controller中获得hibernate的session方法-CSDN问答

controller中获得hibernate的session方法

环境:Spring+Hibernate,事务由org.springframework.orm.hibernate4.HibernateTransactionManager管理
需求是这样的，带有@Transactional注解的Service类中有两个方法:
1. check()----用来验证数据
2. insert()----用来插入数据
我想在controller方法中显式声明一个事物并把check()和insert()放入这个事务中，代码如下

        Session session = transactionManager.getSessionFactory().openSession();//**1**
      //Session session = transactionManager.getSessionFactory().getCurrentSession();//**2**
        Transaction tx = session.beginTransaction();//手动开启事务
            try{
                    check();
                    insert();
                    tx.commit();
            }catch(Exception e){
                    tx.rollback();
            }

现在问题来了，在使用由1标注的方法获取session是可以的，但是用2方法会报
org.springframework.transaction.CannotCreateTransactionException: Could not open Hibernate Session for transaction; nested exception is org.hibernate.TransactionException: nested transactions not supported
这是什么原因呢？难道进入service必须另外开启事务？

编辑于：2016.05.11 08:38 发布于：2016.05.11 08:36

| 评论0 | 收藏 | 浏览1253 |

: javabean12345

声望： 2

1个回答

按赞数排序

你试试HttpSession

发布于：2016.05.11 09:01

评论 1 |

: haikuokuangtu

声望： 79

: javabean12345 hibernate的session,不是一回事。。; 大约 4 年之前回复

: 插入链接

本地上传网络图片

上传中...

浏览

上传图片

插入图片

其他相关推荐

为什么HibernateUtil中的session返回说是空指针，是导包的原因么？？: package com.util; import java.io.File; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; import org.hibernate.Session; public class HibernateUtil { private static SessionFactory sessionFactory; static{ try{ sessionFactory=new Configuration().configure(new File("hibernate.cfg.xml")).buildSessionFactory(); }catch(Exception ex){ ex.printStackTrace(); } } public static SessionFactory getSessionFactory(){ return sessionFactory; } public static Session openSession(){ Session session=null; session=sessionFactory.openSession(); return session; } public static void close(Session session){ if(null!=session){ session.close(); } } }

org.hibernate.HibernateException: No Session found for current thread: <div class="iteye-blog-content-contain" style="font-size: 14px;"> hibernate：4.1.6 spring：4.0.1 工程启动没错，进入getAllUser页面获得数据库用户信息时报如下错误： 严重: Servlet.service() for servlet springMVC threw exception org.hibernate.HibernateException: No Session found for current thread at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:106) at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:941) at com.mlf.web.controller.dao.UserDAO.getAllUser(UserDAO.java:27) at com.mlf.web.controller.service.UserManager.getAllUser(UserManager.java:28) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) at $Proxy19.getAllUser(Unknown Source) at com.mlf.web.controller.UserController.getAllUser(UserController.java:36) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837) at javax.servlet.http.HttpServlet.service(HttpServlet.java:723) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:149) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:879) at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:617) at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1760) at java.lang.Thread.run(Thread.java:619) ----------------------------------------------------------------------------------------------------------------------------------------- hibernate.cfg.test.xml（com.mlf.web.controller.hibernate） <pre name="code" class="xml"><?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <mapping class="com.mlf.web.controller.entity.User"/> </session-factory> </hibernate-configuration></pre> ----------------------------------------------------------------------------------------------------------------------------------------- applicationContext.xml(com.mlf.web.controller.spring) <pre name="code" class="xml"><?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd" [ <!ENTITY contextInclude SYSTEM "org/springframework/web/context/WEB-INF/contextInclude.xml"> ]> <beans> <bean id="userDao" class="com.mlf.web.controller.dao.UserDAO"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <bean id="userManagerBase" class="com.mlf.web.controller.service.UserManager"> <property name="userDao" ref="userDao"></property> </bean> <bean id="userManager" parent="transactionBese"> <property name="target" ref="userManagerBase"></property> </bean> </beans> </pre> ----------------------------------------------------------------------------------------------------------------------------------------- spring-annotation.xml(包：config) <pre name="code" class="xml"><?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">  <context:component-scan base-package="com.mlf.web.controller"></context:component-scan>  <mvc:annotation-driven/>   <mvc:resources location="/img/" mapping="/img/**"/> <mvc:resources location="/js/" mapping="/js/**"/> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"></property> <property name="suffix" value=".jsp"></property> </bean>  <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8"/>  <property name="maxUploadSize" value="10485760000"/>  <property name="maxInMemorySize" value="40960"/> </bean> </beans></pre> ----------------------------------------------------------------------------------------------------------------------------------------- spring-core.xml(包：config) <pre name="code" class="xml"><?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd" [ <!ENTITY contextInclude SYSTEM "org/springframework/web/context/WEB-INF/contextInclude.xml"> ]> <beans> <import resource="classpath:com/mlf/web/controller/spring/applicationContext.xml"/> </beans> </pre> ----------------------------------------------------------------------------------------------------------------------------------------- spring-hibernate.xml(包：config) <pre name="code" class="xml"><?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd" [ <!ENTITY contextInclude SYSTEM "org/springframework/web/context/WEB-INF/contextInclude.xml"> ]> <beans> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver"></property> <property name="url" value="jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncodeing=utf-8"></property> <property name="username" value="root"></property> <property name="password" value="donny2014"></property> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</prop>  <prop key="hibernate.hbm2ddl.auto">update</prop>  <prop key="hibernate.show_sql">true</prop>  <prop key="hibernate.format_sql">true</prop> </props> </property> <property name="configLocations"> <list> <value> classpath:com/mlf/web/controller/hibernate/hibernate.cfg.test.xml </value> </list> </property> </bean> <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean>  <bean id="transactionBese" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" lazy-init="true" abstract="true"> <property name="transactionManager" ref="transactionManager"></property> <property name="transactionAttributes"> <props> <prop key="add*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="update*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="insert*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="modify*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="delete*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="get*">PROPAGATION_NEVER</prop> </props> </property> </bean> </beans> </pre> ----------------------------------------------------------------------------------------------------------------------------------------- UserController.java(包：com.mlf.web.controller) <pre name="code" class="java">package com.mlf.web.controller; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import com.mlf.web.controller.entity.User; import com.mlf.web.controller.service.IUserManager; @Controller @RequestMapping("/user") public class UserController { @Resource(name="userManager") private IUserManager userManager; @RequestMapping("/toAddUser") public String toAddUser(){ return "/addUser"; } @RequestMapping("/addUser") public String addUser(User user){ userManager.addUser(user); return "/success"; } @RequestMapping("/getAllUser") public String getAllUser(HttpServletRequest request){ List<User> user = userManager.getAllUser(); request.setAttribute("user", user); return "/userManager"; } } </pre> </div>

我在实体上定义了一个hibernate filter，在interceptor中开启filter，但是controller中没有应用这个拦截器: 我在实体上定义了一个hibernate filter，在interceptor中开启filter，但是controller中没有应用这个拦截器，请问一下原因是什么，EntityManager中的session在不同的类里是会发生变化的么？

Spring整合hibernate4时出现no session错误: 首先将eclipse抛出的错误贴出来： ``` 严重: Servlet.service() for servlet [springDispatcherServlet] in context with path [/VideoMngSys] threw exception [Request processing failed; nested exception is org.hibernate.HibernateException: No Session found for current thread] with root cause org.hibernate.HibernateException: No Session found for current thread at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:106) at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:988) at com.vincent.videosys.dao.BaseDao.getSession(BaseDao.java:17) at com.vincent.videosys.dao.UserDao.usernameExist(UserDao.java:29) at com.vincent.videosys.service.UserService.usernameExistService(UserService.java:19) at com.vincent.videosys.controller.home.UserController.usernameExist(UserController.java:40) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle (ServletInvocableHandlerMethod.java:104) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod (RequestMappingHandlerAdapter.java:748) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal (RequestMappingHandlerAdapter.java:689) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle (AbstractHandlerMethodAdapter.java:83) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931) .... ``` ![项目工程结构如下：](https://img-ask.csdn.net/upload/201601/02/1451707793_69876.png) 下面依次贴出我的相关文件代码： 1.web.xml ``` <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">  <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>  <filter> <filter-name>HiddenHttpMethodFilter</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>HiddenHttpMethodFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>  <servlet> <servlet-name>springDispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet>  <servlet-mapping> <servlet-name>springDispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>login.jsp</welcome-file> </welcome-file-list> </web-app> ``` 2.spring-mvc.xml ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" ......>  <context:annotation-config />  <context:component-scan base-package="com.vincent.videosys"></context:component-scan>  <context:property-placeholder location="classpath:db.properties"/>  <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="user" value="${jdbc.user}"></property> <property name="password" value="${jdbc.password}"></property> <property name="driverClass" value="${jdbc.driverClass}"></property> <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property> <property name="initialPoolSize" value="${jdbc.initPoolSize}"></property> <property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property> </bean>  <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"></property> <property name="configLocation" value="classpath:hibernate.cfg.xml"></property> <property name="packagesToScan"> <list> <value>com.vincent.videosys.*</value> </list> </property> </bean>  <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean>  <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"></bean>  <tx:annotation-driven transaction-manager="transactionManager"/>  <aop:config> <aop:pointcut expression="execution(* com.vincent.videosys.service.*.*(..))" id="txPointcut"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/> </aop:config> </beans> ``` 4.hibernate.cfg.xml ``` <?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory>     <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>   <property name="hibernate.show_sql">true</property>  <property name="hibernate.format_sql">true</property>  <property name="hibernate.hbm2ddl.auto">update</property> <property name="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</property> </session-factory> </hibernate-configuration> ``` 5.db.properties jdbc.user=root jdbc.password=root jdbc.driverClass=com.mysql.jdbc.Driver jdbc.jdbcUrl=jdbc:mysql://localhost:3306/videomngsys jdbc.initPoolSize=5 jdbc.maxPoolSize=10 6. BaseDao.java ``` package com.vincent.videosys.dao; import javax.annotation.Resource; ..... @Repository("baseDao") public class BaseDao{ @Autowired protected SessionFactory sessionFactory; public Session getSession(){ return this.sessionFactory.getCurrentSession(); } } ``` 7.UserDao.java ``` package com.vincent.videosys.dao; import org.hibernate.Query; import org.hibernate.Session; .... @Repository("userDao") public class UserDao extends BaseDao{ protected SessionFactory sessionFactory; /** * 查看该用户名在数据库中是否存在 * 存在返回true * 不存在返回false * 默认返回true * @param username * @return */ public boolean usernameExist(String username){ boolean exist = true; String hqlString = "from user where username = :username"; Session session = super.getSession(); Query query = session.createQuery(hqlString); query.setParameter("username", username); List<User> list = query.list(); if(list.size() > 0) { exist = false; } return exist; } } ``` 8 UserService.java ``` package com.vincent.videosys.service; import javax.annotation.Resource; import org.springframework.beans.factory.annotation.Autowired; ... @Transactional @Service("userService") public class UserService { @Autowired private UserDao userDao; public boolean usernameExistService(String username){ return userDao.usernameExist(username); } } ``` 9. UserController.java ``` package com.vincent.videosys.controller.home; import java.util.HashMap; import java.util.Map; import javax.annotation.Resource; ..... @RequestMapping("/user") @Controller public class UserController { @Autowired private UserService userService; @ResponseBody @RequestMapping(value="/usernameExist",method=RequestMethod.POST) public Map<String, String> usernameExist(@RequestParam("username")String usernameString ){ Map<String, String> resultMap = new HashMap<String, String>(); System.out.println("username: "+usernameString); if(userService.usernameExistService(usernameString)){ resultMap.put("status", "1");//exits } else{ resultMap.put("status", "0");//not exist } return resultMap; } } ``` 每次程序执行到UserController类中的userNameExist方法时，开始调用userService中的方法时，便开始抛出错误.....

SSH 控制 session 开和关以及线程thread的管理: 问个关于session 和线程thread 的问题： 1、用hibernate 可以控制session 何时开、何时关闭以及事务的开和关，但是使用SSH 之后，用spring 的 HibernateDaoSupport 和事务 TransactionProxyFactoryBean 代替了以前的一些session和 transaction 方面的操作，这样一来是如何控制session的开和关，还是spring自动控制session 开和关？ spring是如何控制事务的开和关？ 2、单独的hibernate 可以用线程ThreadLocal来管理Session，加入使用spring之后如何处理和线程之间的关系？刚弄这方面的东西，不是很了解。哪位推荐一下优化的好策略。

Transaction Session 问题求助！: HibernateUtil.java * * @author Tyler */ public class HibernateUtil { private static final SessionFactory sessionFactory; static { try { // Create the SessionFactory from standard (hibernate.cfg.xml) // config file. Configuration configuration = new Configuration().configure(); ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder() .applySettings(configuration.getProperties()).build(); sessionFactory = configuration .buildSessionFactory(serviceRegistry); // return sessionFactory; } catch (Throwable ex) { // Log the exception. System.err.println("Initial SessionFactory creation failed." + ex); throw new ExceptionInInitializerError(ex); } } public static SessionFactory getSessionFactory() { return sessionFactory; } } ----------------------------------------------------------------- //查询 private List criteriaIUL_get(String key) { Session session = HibernateUtil.getSessionFactory().getCurrentSession(); session.beginTransaction(); // Query q = session.createQuery(UI_BaseOnEquipmentId); Criteria criteria = session.createCriteria(InfosysUserInfo.class); Criterion criterion; switch (key.length()) { case 5: criterion = Restrictions.eq("equipmentId", key); break; case 11: criterion = Restrictions.or(Restrictions.eq("phone1", key), Restrictions.eq("phone2", key)); break; default: criterion = null; break; } if (criterion == null) { return null; } criteria.add(criterion); List<InfosysUserInfo> resultList = criteria.list(); session.getTransaction().commit(); return resultList; } －－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－ hibernate.cfg.xml <property name="hibernate.current_session_context_class">thread</property> 第一次事务没有问题，第二次查询时出现：（这是什么问题） Exception in thread "AWT-EventQueue-0" org.hibernate.TransactionException: nested transactions not supported at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:154) at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1435) at sun.reflect.GeneratedMethodAccessor41.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.hibernate.context.internal.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:356) at com.sun.proxy.$Proxy0.beginTransaction(Unknown Source) at frame.JFrameMain.criteriaIUL_get(JFrameMain.java:51) at frame.JFrameMain.jBqueryUserMouseClicked(JFrameMain.java:617) at frame.JFrameMain.access$12(JFrameMain.java:615) at frame.JFrameMain$13.mouseClicked(JFrameMain.java:507) at java.awt.AWTEventMulticaster.mouseClicked(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$500(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)

jsp中session不一致问题: 场景: 在a.jsp中引入社会化登录,在出来的社会化登录页面中登录成功之后相关的用户信息返回到b.jsp上,在b.jsp上通过ajax将用户信息传回后处理,通过session.put("userId",userId)存到session中.然后,返回操作结果到b.jsp上,通过window.location.href=redirect_url跳转到a.jsp上. 结果:在跳转到a.jsp上后，获取不到session里的userId值。问题： 1、location.href不是在当前标签页中改变url的吗？怎么跳到前面的a.jsp上了？？ 2、对比了前后台的sessionid,发现两个不一致。为毛会session变了的呢？应该怎么解决呢？？

Spring事务总是报org.hibernate.HibernateException: No Session found for current thread: <div class="iteye-blog-content-contain" style="font-size: 14px;"> 今天搞了一下spring mvc的注解，弄到数据库的时候，向数据库中存数据没办法存入成功，看一下错误代码是org.hibernate.HibernateException: No Session found for current thread，网上找了一些方法一直没解决，哪位帮忙看一下，代码如下 applicationContext-db.xml代码： <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd" default-lazy-init="true"> <bean id="druid_dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="url" value="jdbc:oracle:thin:@localhost:1521:local" /> <property name="username" value="activity" /> <property name="password" value="activitygc" /> <property name="maxActive" value="20" /> <property name="validationQuery" value="select * from dual" /> <property name="testWhileIdle" value="true" /> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> <property name="dataSource" ref="druid_dataSource" /> <property name="packagesToScan" value="com.mvc.model*"></property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop> <prop key="show_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> <prop key="hibernate.jdbc.batch_size">20</prop>   </props> </property> </bean>  <aop:aspectj-autoproxy expose-proxy="true" />  <tx:annotation-driven transaction-manager="transactionManager" /> <bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> </bean> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="add*" propagation="REQUIRED" /> <tx:method name="create*" propagation="REQUIRED" /> <tx:method name="insert*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="merge*" propagation="REQUIRED" /> <tx:method name="del*" propagation="REQUIRED" /> <tx:method name="remove*" propagation="REQUIRED" /> <tx:method name="put*" propagation="REQUIRED" /> <tx:method name="use*" propagation="REQUIRED" />  <tx:method name="get*" propagation="REQUIRED" read-only="true" /> <tx:method name="count*" propagation="REQUIRED" read-only="true" /> <tx:method name="find*" propagation="REQUIRED" read-only="true" /> <tx:method name="list*" propagation="REQUIRED" read-only="true" /> <tx:method name="is*" propagation="REQUIRED" read-only="true" /> </tx:attributes> </tx:advice> <aop:config expose-proxy="true" proxy-target-class="true">  <aop:pointcut id="txPointcut" expression="execution(* com.mvc.dao..*.*(..))" /> <aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut" /> </aop:config>  <context:component-scan base-package="com.mvc.dao" /> <context:component-scan base-package="com.mvc.service" /> </beans> spring-servlet.xml代码 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd" default-lazy-init="true">  <context:annotation-config />  <context:component-scan base-package="com.mvc.*" />  <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"> <property name="order" value="0"></property> </bean>  <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.StringHttpMessageConverter" /> </list> </property> </bean>  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/test/" p:suffix=".jsp" /> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" p:defaultEncoding="utf-8" /> </beans> web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>s3h3</display-name> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>log4jConfigLocation</param-name> <param-value>/WEB-INF/log4j.properties</param-value> </context-param> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/classes/spring-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <filter> <filter-name>encoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>*.do</url-pattern> </filter-mapping> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>*.jspx</url-pattern> </filter-mapping> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>*.jhtml</url-pattern> </filter-mapping> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>*.html</url-pattern> </filter-mapping> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>*.htm</url-pattern> </filter-mapping> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>*.jsp</url-pattern> </filter-mapping> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app> </div>

SpringMVC和Hibernate的一个冲突点？: Hibernate中，对于某实体的内部实体属性有lazy load功能，可以等到get时才去查询数据库，而不用一开始就join出。 SpringMVC的controller返回JSON格式的数据，一般用Jackson的lib，在实体转换到JSON object时，貌似会激发实体的get方法，而导致了在hibernate session之外调用了查询，结果必然是失败抛异常。网上的做法都是将Lazy load设置为false，感觉这样做不妥，一是lazy load的选择不应该受bug的影响。更主要的是如果实体是folder，内部属性也是folder（上级目录），若不用lazy load岂不是每次查询一个目录，会一连把父级的都查出来？？

hibernate的sessionFactory的问题: <div class="iteye-blog-content-contain" style="font-size: 14px;"> <pre name="code" class="错误信息">2014-8-8 17:29:19 org.hibernate.cfg.Environment <clinit> 信息: Hibernate 3.2.7 2014-8-8 17:29:19 org.hibernate.cfg.Environment <clinit> 信息: hibernate.properties not found 2014-8-8 17:29:19 org.hibernate.cfg.Environment buildBytecodeProvider 信息: Bytecode provider name : cglib 2014-8-8 17:29:19 org.hibernate.cfg.Environment <clinit> 信息: using JDK 1.4 java.sql.Timestamp handling 2014-8-8 17:29:19 org.hibernate.cfg.Configuration configure 信息: configuring from resource: /hibernate.cfg.xml 2014-8-8 17:29:19 org.hibernate.cfg.Configuration getConfigurationInputStream 信息: Configuration resource: /hibernate.cfg.xml 2014-8-8 17:29:19 org.hibernate.cfg.Configuration addResource 信息: Reading mappings from resource : com/bjsxt/hibernate/Student.hbm.xml 2014-8-8 17:29:20 org.hibernate.cfg.Configuration doConfigure 信息: Configured SessionFactory: null 2014-8-8 17:29:20 org.hibernate.cfg.HbmBinder bindRootPersistentClassCommonValues 信息: Mapping class: com.bjsxt.hibernate.Student -> Student 2014-8-8 17:29:20 org.hibernate.connection.DriverManagerConnectionProvider configure 信息: Using Hibernate built-in connection pool (not for production use!) 2014-8-8 17:29:20 org.hibernate.connection.DriverManagerConnectionProvider configure 信息: Hibernate connection pool size: 1 2014-8-8 17:29:20 org.hibernate.connection.DriverManagerConnectionProvider configure 信息: autocommit mode: false 2014-8-8 17:29:20 org.hibernate.connection.DriverManagerConnectionProvider configure 信息: using driver: oracle.jdbc.driver.OracleDriver at URL: jdbc:oracle:thin:@localhost:1521:orcl 2014-8-8 17:29:20 org.hibernate.connection.DriverManagerConnectionProvider configure 信息: connection properties: {user=machanglun, password=****} 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: RDBMS: Oracle, version: Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Production With the Partitioning, OLAP, Data Mining and Real Application Testing options 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: JDBC driver: Oracle JDBC driver, version: 9.2.0.3.0 2014-8-8 17:29:21 org.hibernate.dialect.Dialect <init> 信息: Using dialect: org.hibernate.dialect.OracleDialect 2014-8-8 17:29:21 org.hibernate.dialect.Oracle9Dialect <init> 警告: The Oracle9Dialect dialect has been deprecated; use either Oracle9iDialect or Oracle10gDialect instead 2014-8-8 17:29:21 org.hibernate.dialect.OracleDialect <init> 警告: The OracleDialect dialect has been deprecated; use Oracle8iDialect instead 2014-8-8 17:29:21 org.hibernate.transaction.TransactionFactoryFactory buildTransactionFactory 信息: Using default transaction strategy (direct JDBC transactions) 2014-8-8 17:29:21 org.hibernate.transaction.TransactionManagerLookupFactory getTransactionManagerLookup 信息: No TransactionManagerLookup configured (in JTA environment, use of read-write or transactional second-level cache is not recommended) 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Automatic flush during beforeCompletion(): disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Automatic session close at end of transaction: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: JDBC batch size: 15 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: JDBC batch updates for versioned data: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Scrollable result sets: enabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: JDBC3 getGeneratedKeys(): disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Connection release mode: auto 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Default batch fetch size: 1 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Generate SQL with comments: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Order SQL updates by primary key: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Order SQL inserts for batching: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory createQueryTranslatorFactory 信息: Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory 2014-8-8 17:29:21 org.hibernate.hql.ast.ASTQueryTranslatorFactory <init> 信息: Using ASTQueryTranslatorFactory 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Query language substitutions: {} 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: JPA-QL strict compliance: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Second-level cache: enabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Query cache: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory createCacheProvider 信息: Cache provider: org.hibernate.cache.NoCacheProvider 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Optimize cache for minimal puts: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Structured second-level cache entries: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Echoing all SQL to stdout 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Statistics: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Deleted entity synthetic identifier rollback: disabled 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Default entity-mode: pojo 2014-8-8 17:29:21 org.hibernate.cfg.SettingsFactory buildSettings 信息: Named query checking : enabled 2014-8-8 17:29:21 org.hibernate.impl.SessionFactoryImpl <init> 信息: building session factory Exception in thread "main" org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:110) at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:135) at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:56) at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:323) at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:433) at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:109) at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55) at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:231) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1313) at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:867) at com.bjsxt.hibernate.TeacherTest.main(TeacherTest.java:14) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:107) ... 10 more Caused by: java.lang.NoClassDefFoundError: net/sf/cglib/proxy/CallbackFilter at org.hibernate.bytecode.cglib.BytecodeProviderImpl.getProxyFactoryFactory(BytecodeProviderImpl.java:33) at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactoryInternal(PojoEntityTuplizer.java:208) at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:186) at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:128) at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:78) ... 15 more Caused by: java.lang.ClassNotFoundException: net.sf.cglib.proxy.CallbackFilter at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) ... 20 more </pre> <pre name="code" class="hibernate.cfg.xml"><?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory>  <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property> <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property> <property name="connection.username">xxx</property> <property name="connection.password">xxx</property>  <property name="connection.pool_size">1</property>  <property name="dialect">org.hibernate.dialect.OracleDialect</property>  <property name="current_session_context_class">thread</property>  <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>  <property name="show_sql">true</property>  <property name="hbm2ddl.auto">update</property> <mapping resource="com/bjsxt/hibernate/Student.hbm.xml"/> <mapping class="com.bjsxt.hibernate.Teacher"/> </session-factory> </hibernate-configuration></pre> <pre name="code" class="Teacher.java">package com.bjsxt.hibernate; import javax.persistence.Entity; import javax.persistence.Id; @Entity public class Teacher { private int id; private String name; private String title; @Id public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } } </pre> <pre name="code" class="TeacherTest">package com.bjsxt.hibernate; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.AnnotationConfiguration; public class TeacherTest { public static void main(String[] args) { Teacher t = new Teacher(); t.setId(1); t.setName("t1"); t.setTitle("middle"); SessionFactory sessionFactory = new AnnotationConfiguration().configure().buildSessionFactory(); Session session = sessionFactory.getCurrentSession(); session.beginTransaction(); session.save(t); session.getTransaction().commit(); } } </pre> </div>

多数据源springmvc+hibernate 切换问题在一次请求中多次切换不成功: 最近写了一个多数据源的代码，结果在使用的过程中出现了在一个请求中（方法中）两个数据库交替使用的情况，最后情况是数据库切换不过来并且在项目配置中有懒加载和OpenSessionInViewFilter 数据库一个为本地数据库一个为基金数据库要做的事情就是在本地查询到基金代码接着再循环去基金库查询基金数据中间报错为在本地数据库中查询不到某个表（其实是在基金库中） controller层 ``` @RequestMapping(value = "/fundsmatch") public String fundsMatch(HttpServletRequest request, HttpServletResponse response){ BtnHitsCount hits = olService.findByBtnNameAndPage("匹配理财方案", "我的页面"); hits.setHits(hits.getHits()+1); olService.saveHits(hits); if (getAttributeFromSession(Constant.SESSION_KEY_CURRENTUSERID) == null) { return "login"; } String openuid = "c8572f0f-dca3-4b63-aecd-2f32d5510ba3"; Integer userId = (Integer)getAttributeFromSession(Constant.SESSION_KEY_CURRENTUSERID); -------------------在本地库取数据-------------------- JoUser joUser = joUserService.find(userId); PortfolioMatch match = portfolioMatchService.findEntity(userId+""); List<FundsGroupBean> list = new ArrayList<FundsGroupBean>(); if(joUser.getRisklevel()!=null&&match!=null&&match.getPlanId()!=null){ ScoreStandard standard = scoreStandard.findEntity(match.getScoreId()+""); FundPortfolio fundPortfolio = match.getFundPortfolioId(); String[] fundcodes = fundPortfolio.getFundcodes().split(","); for (int i = 0; i < fundcodes.length; i++) { FundsGroupBean fgb = new FundsGroupBean(); try { --------------切换基金库取数据-------------- JSONObject json = JSONObject.fromObject(fundsNavService.findFundsInfo(fundcodes[i])); --------------切换基金库取数据-------------- } catch (Exception e) { e.printStackTrace();--------------在此报错-------------------- } fgb.setFundCode(fundcodes[i]); list.add(fgb); } request.setAttribute("list", list); request.setAttribute("rates", fundPortfolio.getMinIncomeRate()+"~"+fundPortfolio.getMaxIncomeRate()); request.setAttribute("risktest", 1); request.setAttribute("level", joUser.getRisklevel()+" "+standard.getName()); }else{ return "redirect:/questionnaire/plan_questionnaire"; } return "fundsmatch"; } ``` 基金server层内部代码 ``` @Service public class FundsNavServiceImpl implements FundsNavService { @Autowired FundsNavDao dao; public Map<String, Object> findNav(String fundcode, String day) { ContextHolder.setDbType(DBType.dataSource2); Map<String,Object> map = dao.findNav(fundcode, day); ContextHolder.clearDBType(); return map; } public Map<String, Object> findFundsInfo(String fundcode) { ContextHolder.setDbType(DBType.dataSource2); Map<String,Object> retMap = new HashMap<String,Object>(); retMap.put("fundinfo", dao.findFundsInfo(fundcode)); ContextHolder.clearDBType(); return retMap; } public Map<String, Object> searchFunds(String fundcode, String page, String rows) { ContextHolder.setDbType(DBType.dataSource2); Map<String,Object> retMap = new HashMap<String,Object>(); retMap.put("fundList", dao.searchFunds(fundcode, page, rows)); ContextHolder.clearDBType(); return retMap; } } ``` 数据源枚举类 ``` package com.chy.dangaowm.util.fund; public enum DBType { dataSource1, dataSource2 } ``` 继承的AbstractRoutingDataSource类并且在spring中配置 ``` package com.chy.dangaowm.util.fund; import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource; public class DynamicDataSource extends AbstractRoutingDataSource { @Override protected Object determineCurrentLookupKey() { DBType dbType = ContextHolder.getDBType(); return dbType; } } ``` 基金库切换类 ``` package com.chy.dangaowm.util.fund; public class ContextHolder { private static final ThreadLocal<Object> holder = new ThreadLocal<Object>(); public static void setDbType(DBType dbType){ holder.set(dbType); } public static DBType getDBType(){ return (DBType)holder.get(); } public static void clearDBType(){ holder.remove(); } } ``` spring配置文件 ```  <bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driverClassName}" /> <property name="url" value="${jdbc.slave.url}" /> <property name="username" value="${jdbc.slave.username}" /> <property name="password" value="${jdbc.slave.password}" /> <property name="initialSize" value="${jdbc.initialSize}" /> <property name="maxActive" value="${jdbc.maxActive}" /> <property name="maxIdle" value="${jdbc.maxIdle}" /> <property name="minIdle" value="${jdbc.minIdle}" /> <property name="testOnBorrow" value="${jdbc.testOnBorrow}" /> <property name="testWhileIdle" value="${jdbc.testWhileIdle}" /> <property name="validationQuery" value="${jdbc.validationQuery}" />  </bean>  <bean id="dataSource2" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driverClassName}" /> <property name="url" value="${jdbc.master.url}" /> <property name="username" value="${jdbc.master.username}" /> <property name="password" value="${jdbc.master.password}" /> <property name="initialSize" value="${jdbc.initialSize}" /> <property name="maxActive" value="${jdbc.maxActive}" /> <property name="maxIdle" value="${jdbc.maxIdle}" /> <property name="minIdle" value="${jdbc.minIdle}" /> <property name="testOnBorrow" value="${jdbc.testOnBorrow}" /> <property name="testWhileIdle" value="${jdbc.testWhileIdle}" /> <property name="validationQuery" value="${jdbc.validationQuery}" />  </bean> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" p:dataSource-ref="dataSource1" />  <bean id="mysqlDynamicDataSource" class="com.chy.dangaowm.util.fund.DynamicDataSource"> <property name="targetDataSources">  <map key-type="com.chy.dangaowm.util.fund.DBType"> <entry key="dataSource1" value-ref="dataSource1"/> <entry key="dataSource2" value-ref="dataSource2"/> </map> </property> <property name="defaultTargetDataSource" ref="dataSource1"/> </bean>  <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="mysqlDynamicDataSource" /> <property name="namingStrategy"> <bean class="org.hibernate.cfg.ImprovedNamingStrategy" /> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">${hibernate.dialect}</prop> <prop key="hibernate.show_sql">${hibernate.show_sql}</prop> <prop key="hibernate.format_sql">true</prop> <prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</prop> <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop> </props> </property> <property name="packagesToScan"> <array> <value>com.chy.dangaowm.domain</value> </array> </property> </bean>  <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <tx:annotation-driven transaction-manager="transactionManager" /> ```

Spring+Hibernate 在getCurrentSession的时候报错: 以下是我的配置： spring-mvc.xml: ```  <context:property-placeholder location="WEB-INF/config/db.config.properties" />  <context:component-scan base-package="com.cherry.mall" />  <mvc:annotation-driven>  <mvc:message-converters register-defaults="true"> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> <value>application/json;charset=UTF-8</value> </list> </property> </bean> </mvc:message-converters> </mvc:annotation-driven>  <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/pages/" /> <property name="suffix" value=".jsp" /> </bean>   ``` srping-hibernate： ``` <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd">  <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> <property name="driverClass" value="${jdbc.driver}" /> <property name="jdbcUrl" value="${jdbc.url}" /> <property name="user" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" />  <property name="checkoutTimeout" value="30000" />  <property name="idleConnectionTestPeriod" value="30" />  <property name="maxIdleTime" value="30" />  <property name="initialPoolSize" value="5" /> <property name="minPoolSize" value="5" /> <property name="maxPoolSize" value="20" />  <property name="acquireIncrement" value="5" /> </bean>  <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">  <property name="dataSource" ref="dataSource" />  <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">${hibernate.dialect}</prop> <prop key="hibernate.show_sql">${hibernate.show_sql}</prop> <prop key="hibernate.format_sql">${hibernate.format_sql}</prop> <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>   </props> </property>  <property name="packagesToScan" value="com.cherry.mall.**.model" /> </bean>  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="/WEB-INF/config/mybatis-config.xml"></property> <property name="mapperLocations" value="classpath*:com/cherry/mall/**/mapping/*.xml"></property> </bean>  <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> </bean>  <tx:advice id="transactionAdvice" transaction-manager="transactionManager">  <tx:attributes> <tx:method name="insert*" propagation="REQUIRED" /> <tx:method name="create*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="alter*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> <tx:method name="get*" propagation="SUPPORTS" read-only="true" /> <tx:method name="query*" propagation="SUPPORTS" read-only="true" /> <tx:method name="find*" propagation="SUPPORTS" read-only="true" /> <tx:method name="select*" propagation="SUPPORTS" read-only="true" /> <tx:method name="load*" propagation="SUPPORTS" read-only="true" />  <tx:method name="*" /> </tx:attributes> </tx:advice>  <aop:config>  <aop:pointcut id="transactionPointcut" expression="execution(* com.cherry.mall..*.service..*.*(..))" />  <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" /> </aop:config> </beans> ``` 报错信息： ``` org.hibernate.HibernateException: Could not obtain transaction-synchronized Session for current thread at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:134) at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:1014) at com.cherry.mall.common.dao.CommonDAO.getHBSession(CommonDAO.java:29) at com.cherry.mall.common.dao.CommonDAO.create(CommonDAO.java:48) at com.cherry.mall.common.service.CommonServiceImpl.create(CommonServiceImpl.java:72) at com.cherry.mall.message.service.impl.MessageServiceImpl.create(MessageServiceImpl.java:30) at com.cherry.mall.message.service.impl.MessageServiceImpl.create(MessageServiceImpl.java:1) at com.cherry.mall.message.controller.MessageController.save(MessageController.java:42) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1653) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) at java.lang.Thread.run(Thread.java:722) ``` 报错地点： ![图片说明](https://img-ask.csdn.net/upload/201708/17/1502946641_931733.png) 求大神指教

整合Spring+SpringMVC+Hibernate时，无法进入控制层: 整合Spring+SpringMVC+Hibernate时，启动正常，可以打开登录页面，但是进行登录时，无法进入controller层，而且不报错，只输出三行日志。 DispatcherServlet with name 'springMVC' processing POST request for [/SSH/user/login.do] No mapping found for HTTP request with URI [/SSH/user/login.do] in DispatcherServlet with name 'springMVC' Successfully completed request 意思大概是找不到路径，但应该不是路径的问题，如果路径有问题，页面上message会显示有问题的路径，而不是什么都没有。 HTTP Status 404 - type Status report message description The requested resource is not available. Apache Tomcat/7.0.82 spring-context.xml配置是这样的  <context:component-scan base-package="service,dao,entity,controller"/>  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" > <property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver" /> <property name="url" value="jdbc:sqlserver://localhost:1433;database=user_role" /> <property name="username" value="sa"/> <property name="password" value="123456"/> </bean>  <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop>  <prop key="hibernate.hbm2ddl.auto">update</prop>  <prop key="hibernate.show_sql">true</prop>  <prop key="hibernate.format_sql">true</prop>  </props> </property> <property name="annotatedClasses"> <list> <value>entity</value> </list> </property> </bean>   <tx:annotation-driven transaction-manager="transactionManager"/>  <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> </bean>  <bean id="transactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true"> <property name="transactionManager" ref="transactionManager"></property> <property name="transactionAttributes"> <props> <prop key="add*">PROPAGATION_REQUIRED,-Exception</prop> <prop key="modify*">PROPAGATION_REQUIRED,-myException</prop> <prop key="del*">PROPAGATION_REQUIRED</prop> <prop key="*">PROPAGATION_REQUIRED</prop> </props> </property> </bean> spring-mvc.xml配置  <mvc:annotation-driven />  <context:component-scan base-package="controller" />  <mvc:resources location="/js/" mapping="/js/**"/>  <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/jsp/"></property> <property name="suffix" value=".jsp"></property> </bean> web配置 <display-name>SSH</display-name> <welcome-file-list> <welcome-file>login.jsp</welcome-file> </welcome-file-list>  <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:config/spring-context.xml</param-value> </context-param>  <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>  <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener>  <servlet> <servlet-name>springMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:config/spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>  <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>   <filter> <filter-name>openSession</filter-name> <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> <init-param> <param-name>sessionFactoryBeanName</param-name> <param-value>sessionFactory</param-value> </init-param> </filter> <filter-mapping> <filter-name>openSession</filter-name> <url-pattern>/</url-pattern> </filter-mapping>

getSession出现空指针异常: ActionContext.getContext().getSession()；直接报空指针异常查资料好像是说session必须在Action里使用，因为我是做串口监听，查到数据准备保存到session里，所以报错了（ActionContext.getContext().getSession().put("screwObj",screwObj);报错），screwObj对象有值。有大神知道具体是什么原因吗？要怎样弄才能存到session？我是想把获取到的数据显示到页面上，准备用轮询读取session的值，有其它方法传值也行啊！！！

Java Hibernate运行问题: 错误信息 ``` java.lang.NoClassDefFoundError: javax/transaction/SystemException at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at org.jboss.logging.Logger$1.run(Logger.java:2554) at java.security.AccessController.doPrivileged(Native Method) at org.jboss.logging.Logger.getMessageLogger(Logger.java:2529) at org.jboss.logging.Logger.getMessageLogger(Logger.java:2516) at org.hibernate.internal.CoreLogging.messageLogger(CoreLogging.java:28) at org.hibernate.internal.CoreLogging.messageLogger(CoreLogging.java:24) at org.hibernate.cfg.Configuration.<clinit>(Configuration.java:86) at com.lee.hibernate.HibernateTest.test(HibernateTest.java:23) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) Caused by: java.lang.ClassNotFoundException: javax.transaction.SystemException at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ... 33 more ``` hibernate.cfg.xml ``` <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory>  <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">root</property> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate</property>   <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>  <property name="show_sql">true</property>  <property name="format_sql">true</property>  <property name="hibernate.hbm2ddl.auto">create</property>  <mapping resource="/com/lee/hibernate/News.hbm.xml"/> </session-factory> </hibernate-configuration> ``` News.hbm.xml ``` <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">  <hibernate-mapping> <class name="com.lee.hibernate.News" table="NEWS"> <id name="id" type="java.lang.Integer"> <column name="ID" /> <generator class="native" /> </id> <property name="title" type="java.lang.String"> <column name="TITLE" /> </property> <property name="author" type="java.lang.String"> <column name="AUTHOR" /> </property> <property name="date" type="java.sql.Date"> <column name="DATE" /> </property> </class> </hibernate-mapping> ``` News.java ``` package com.lee.hibernate; import java.sql.Date; public class News { private Integer id; private String title; private String author; private Date date; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getAuthor() { return author; } public void setAuthor(String author) { this.author = author; } public Date getDate() { return date; } public void setDate(Date date) { this.date = date; } public News() { super(); } public News(String title, String author, Date date) { super(); this.title = title; this.author = author; this.date = date; } @Override public String toString() { return "News [id=" + id + ", title=" + title + ", author=" + author + ", date=" + date + "]"; } } ``` HibernateTest.java ``` package com.lee.hibernate; import java.sql.Date; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; //import org.hibernate.boot.registry.StandardServiceRegistryBuilder; import org.hibernate.cfg.Configuration; //import org.hibernate.service.ServiceRegistry; import org.junit.Test; public class HibernateTest { @Test public void test() { //1 创建一个SessionFactory对象 SessionFactory sessionFactory = null; //1) 创建Configuration对象: 对应hibernate的基本配置信息和对象映射信息 Configuration configuration = new Configuration().configure(); sessionFactory = configuration.buildSessionFactory(); //2)创建sessionRegistry对象: hibernate 4.x新添加的对象 //hibernate的任何配置和服务都需要在该对象注册后才能有效. // ServiceRegistry serviceRegistry = // new StandardServiceRegistryBuilder(). // applySettings(configuration.getProperties()) // .build(); //3) // sessionFactory = configuration.buildSessionFactory(sessionRegistry); //2 创建一个Session对象 Session session = sessionFactory.openSession(); //3 开启事务 Transaction transaction = session.beginTransaction(); //4 执行保存操作 News news = new News("Java", "Lee", new Date(new java.util.Date().getTime())); session.save(news); //5 提交事务 transaction.commit(); //6 关闭Session session.close(); //7 关闭SessionFactory对象 sessionFactory.close(); } } ``` hibernate框架是5.0.0.Final版本 mysql-jdbc驱动是5.1.37-bin版本 JUnit是4.10版本 Java8 Eclipse Version: Mars.1 Release (4.5.1) Windows10 Configuration错误, 但不了解, 麻烦解答

hibernate错误: [b]TEST CODE[/b]:package Hexample; import java.util.Date; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; public class HibernateTest { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Guestbook gb=new Guestbook(); gb.setName("abc"); gb.setEmail("habn@hotmail.com"); gb.setPhone("142341"); gb.setTitle("hello"); gb.setContent("sfdsfsdfdsfsd"); gb.setCreatedTime(new Date()); Configuration config=new Configuration(); config.configure(); SessionFactory sessionFactory=config.buildSessionFactory(); Session session=sessionFactory.getCurrentSession(); Transaction tx=session.beginTransaction(); session.save(gb); tx.commit(); }} [b]GUESTBOOK.HBM.XML[/b] <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="Hexample"> <class name="Guestbook" table="GUESTBOOK" lazy="true"> <comment>Users may bid for or sell auction items.</comment> <id name="id"> <generator class="sequence"> <param name="sequence" >gb_seq</param> </generator> </id> <property name="name" column="name" type="java.lang.String"></property> <property name="email" column="email" type="java.lang.String"></property> <property name="title" column="title" type="java.lang.String"></property> <property name="content" column="content" type="java.lang.String"></property> <property name="phone" column="phone" type="java.lang.String"></property> <property name="createdTime" column="created_time" type="java.util.Date"></property> </class> </hibernate-mapping> [b]配置文件[/b] <?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory>  <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property> <property name="connection.url">jdbc:oracle:thin:@localhost:1521:XE</property> <property name="connection.username">xuanyuanjian</property> <property name="connection.password">shixiaochen</property>  <property name="connection.pool_size">2</property>  <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>  <property name="current_session_context_class">org.hibernate.context.ManagedSessionContext</property>  <property name="cache.provider_class">thread</property>  <property name="show_sql">true</property> <mapping resource="Hexample/Guestbook.hbm.xml"></mapping> </session-factory> </hibernate-configuration> Exception in thread "main" org.hibernate.HibernateException: could not instantiate RegionFactory [org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge] at org.hibernate.cfg.SettingsFactory.createRegionFactory(SettingsFactory.java:412) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:271) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325) at Hexample.HibernateTest.main(HibernateTest.java:30) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.hibernate.cfg.SettingsFactory.createRegionFactory(SettingsFactory.java:407) ... 4 more Caused by: org.hibernate.cache.CacheException: could not instantiate CacheProvider [thread] at org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge.<init>(RegionFactoryCacheProviderBridge.java:66) ... 9 more Caused by: java.lang.ClassNotFoundException: thread at java.net.URLClassLoader$1.run(URLClassLoader.java:200) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:252) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:123) at org.hibernate.cache.impl.bridge.RegionFactoryCacheProviderBridge.<init>(RegionFactoryCacheProviderBridge.java:63) ... 9 more 这个错误。。baidu无果请各位大大帮小弟寻找解决之道谢谢大家了

hibernate保存数据报错: org.springframework.dao.DataIntegrityViolationException: Could not execute JDBC batch update; SQL [insert into ORC_T_BUSINESS_TRACK (BUSI_NUM, BUSI_TYPE, CREATE_DATE, CREATE_USER_NAME, CREATE_USER_NUM, REMARK, ID) values (?, ?, ?, ?, ?, ?, ?)]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:643) at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:104) at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:516) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754) at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723) at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:394) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:90) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622) at com.bsteel.shdc.service.OrcTBusinessTrackServiceImpl$$EnhancerByCGLIB$$416c9ca9.saveOrcTBusinessTrack(<generated>) at com.bsteel.shdc.bankservice.finance.redeem.controller.AuditController.signaTure1(AuditController.java:642) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:96) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:617) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:578) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:789) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221) at com.bsteel.shdc.manager.permission.filter.AuthFilter.doFilter(AuthFilter.java:101) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399) at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766) at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:945) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:756) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410) at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582) Caused by: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:96) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:262) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:178) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1206) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:375) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:137) at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:76) at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:512) ... 47 more Caused by: java.sql.BatchUpdateException: ORA-01401: inserted value too large for column at oracle.jdbc.driver.DatabaseError.throwBatchUpdateException(DatabaseError.java:345) at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:10844) at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:70) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:268) ... 56 more [color=red][/color]

请问,hibernate 与oracle 11g 链接的配置这样写哪里有问题?: 这是我的配置文件: [code="xml"]<hibernate-configuration> <session-factory> <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property> <property name="hibernate.connection.url">jdbc:oracle:thin:@LOCALHOST:1521:ORCL</property> <property name="hibernate.connection.username">SCOTT</property> <property name="hibernate.connection.password">tiger</property> <property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property> <property name="hibernate.show_sql">true</property> <property name="hibernate.hbm2ddl.auto">update</property> <mapping resource="user.hbm.xml"/> <mapping resource="friend.hbm.xml"/> <mapping resource="userinfo.hbm.xml"/> <mapping resource="offlinemessage.hbm.xml"/> </session-factory> </hibernate-configuration>[/code] 下面是报错信息: [code="java"]org.hibernate.HibernateException: Hibernate Dialect must be explicitly set at org.hibernate.dialect.DialectFactory.determineDialect(DialectFactory.java:57) at org.hibernate.dialect.DialectFactory.buildDialect(DialectFactory.java:39) at org.hibernate.cfg.SettingsFactory.determineDialect(SettingsFactory.java:426) at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:128) at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2090) at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2086) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1311) at org.fw.utils.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:32) at org.fw.qq.server.QQServer$1.actionPerformed(QQServer.java:46) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) at java.awt.Component.processMouseEvent(Component.java:6505) at javax.swing.JComponent.processMouseEvent(JComponent.java:3320) at java.awt.Component.processEvent(Component.java:6270) at java.awt.Container.processEvent(Container.java:2229) at java.awt.Component.dispatchEventImpl(Component.java:4861) at java.awt.Container.dispatchEventImpl(Container.java:2287) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422) at java.awt.Container.dispatchEventImpl(Container.java:2273) at java.awt.Window.dispatchEventImpl(Window.java:2719) at java.awt.Component.dispatchEvent(Component.java:4687) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735) at java.awt.EventQueue.access$200(EventQueue.java:103) at java.awt.EventQueue$3.run(EventQueue.java:694) at java.awt.EventQueue$3.run(EventQueue.java:692) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) at java.awt.EventQueue$4.run(EventQueue.java:708) at java.awt.EventQueue$4.run(EventQueue.java:706) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76) at java.awt.EventQueue.dispatchEvent(EventQueue.java:705) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138) at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)[/code] 请教正确的配置方法,google 搜索的很多还是没有解决.

java jdk 8 帮助文档中文文档 chm 谷歌翻译: JDK1.8 API 中文谷歌翻译版 java帮助文档 JDK API java 帮助文档谷歌翻译 JDK1.8 API 中文谷歌翻译版 java帮助文档 Java最新帮助文档本帮助文档是使用谷

软件测试2小时入门: 本课程内容系统、全面、简洁、通俗易懂，通过2个多小时的介绍，让大家对软件测试有个系统的理解和认识，具备基本的软件测试理论基础。主要内容分为5个部分： 1 软件测试概述，了解测试是什么、测试的对象、原则、流程、方法、模型；  2.常用的黑盒测试用例设计方法及示例演示；  3 常用白盒测试用例设计方法及示例演示；  4.自动化测试优缺点、使用范围及示例‘；  5.测试经验谈。

汽车行驶工况构建2019 D题.zip: 1. 标记0与0之间的片段位置 2.标记所之间的毛刺数的位置 3.去掉毛刺数据速度并生成新的数组 4.标记时间段 5. 0与0之间如果有不连续的时间片段置零先找到时间间隔再看间隔时间对应

Python+OpenCV计算机视觉: Python+OpenCV计算机视觉系统全面的介绍。

面试了一个 31 岁程序员，让我有所触动，30岁以上的程序员该何去何从？: 最近面试了一个31岁8年经验的程序猿，让我有点感慨，大龄程序猿该何去何从。

专为程序员设计的数学课: 限时福利限时福利，15000+程序员的选择！ 1、原价 115 元，限时特价仅需 49 元！ 2、购课后添加学习助手（微信号：csdnxy68），按提示消息领取编程大礼包！并获取讲师答疑服务！ 套餐中一共包含5门程序员必学的数学课程（共47讲） 课程1：《零基础入门微积分》 课程2：《数理统计与概率论》 课程3：《代码学习线性代数》 课程4：《数据处理的最优化》 课程5：《马尔可夫随机过程》 哪些人适合学习这门课程？ 1）大学生，平时只学习了数学理论，并未接触如何应用数学解决编程问题； 2）对算法、数据结构掌握程度薄弱的人，数学可以让你更好的理解算法、数据结构原理及应用； 3）看不懂大牛代码设计思想的人，因为所有的程序设计底层逻辑都是数学； 4）想学习新技术，如：人工智能、机器学习、深度学习等，这门课程是你的必修课程； 5）想修炼更好的编程内功，在遇到问题时可以灵活的应用数学思维解决问题。 在这门「专为程序员设计的数学课」系列课中，我们保证你能收获到这些: ①价值300元编程课程大礼包 ②应用数学优化代码的实操方法 ③数学理论在编程实战中的应用 ④程序员必学的5大数学知识 ⑤人工智能领域必修数学课 备注：此课程只讲程序员所需要的数学，即使你数学基础薄弱，也能听懂，只需要初中的数学知识就足矣。 如何听课？ 1、登录CSDN学院 APP 在我的课程中进行学习； 2、登录CSDN学院官网。 购课后如何领取免费赠送的编程大礼包和加入答疑群？ 购课后，添加助教微信： csdnxy68，按提示领取编程大礼包，或观看付费视频的第一节内容扫码进群答疑交流！ <img src="https://img-bss.csdn.net/201912251155398753.jpg" alt="">

微信公众平台开发入门: 本套课程的设计完全是为初学者量身打造，课程内容由浅入深，课程讲解通俗易懂，代码实现简洁清晰。通过本课程的学习，学员能够入门微信公众平台开发，能够胜任企业级的订阅号、服务号、企业号的应用开发工作。通过本课程的学习，学员能够对微信公众平台有一个清晰的、系统性的认识。例如，公众号是什么，它有什么特点，它能做什么，怎么开发公众号。其次，通过本课程的学习，学员能够掌握微信公众平台开发的方法、技术和应用实现。例如，开发者文档怎么看，开发环境怎么搭建，基本的消息交互如何实现，常用的方法技巧有哪些，真实应用怎么开发。

4小时玩转微信小程序——基础入门与微信支付实战: 这是一个门针对零基础学员学习微信小程序开发的视频教学课程。课程采用腾讯官方文档作为教程的唯一技术资料来源。杜绝网络上质量良莠不齐的资料给学员学习带来的障碍。视频课程按照开发工具的下载、安装、使用、程序结构、视图层、逻辑层、微信小程序等几个部分组织课程，详细讲解整个小程序的开发过程

Java基础知识面试题（2020最新版）: 文章目录Java概述何为编程什么是Javajdk1.5之后的三大版本JVM、JRE和JDK的关系什么是跨平台性？原理是什么Java语言有哪些特点什么是字节码？采用字节码的最大好处是什么什么是Java程序的主类？应用程序和小程序的主类有何不同？Java应用程序与小程序之间有那些差别？Java和C++的区别Oracle JDK 和 OpenJDK 的对比基础语法数据类型Java有哪些数据类型switc...

IE主页被篡改修复: IE主页修复。IE主页被篡改修复。一键修复IE主页

我说我不会算法，阿里把我挂了。: 不说了，字节跳动也反手把我挂了。

土豆SDK(Java版)-非官方: 由于土豆SDK一直建设中，最近几天抽空写了一套java的SDK。包含了现有的所有请求协议。本套SDK中仅提供了oAuth的方式(引用oAuth.net的java版示例)，并没有在框架中实现，涉及到登录

Java8零基础入门视频教程: 这门课程基于主流的java8平台，由浅入深的详细讲解了java SE的开发技术，可以使java方向的入门学员，快速扎实的掌握java开发技术！

【数据结构与算法综合实验】欢乐连连看(C++ & MFC)案例: 这是武汉理工大学计算机学院数据结构与算法综合实验课程的第三次项目：欢乐连连看(C++ & MFC)迭代开发代码。运行环境：VS2017。已经实现功能：开始游戏、消子、判断胜负、提示、重排、计时、帮助。

数学建模竞赛D题“汽车行驶工况构建: 第十六届“华为杯”数学建模竞赛D题“汽车行驶工况构建”论文。论文获得比赛国家二等奖，论文为原创，仅供参考。关键词：数据处理；降维；聚类。

Vue.js 2.0之全家桶系列视频课程: 基于新的Vue.js 2.3版本，目前新全的Vue.js教学视频，让你少走弯路，直达技术前沿！ 1. 包含Vue.js全家桶（vue.js、vue-router、axios、vuex、vue-cli、webpack、ElementUI等） 2. 采用笔记+代码案例的形式讲解，通俗易懂

Android音视频开发全套: Android平台音视频开发全套，涉及：FFmpeg软解码解码、Mediacodec硬解码编码、Openssl音频播放、OpenGL ES视频渲染、RTMP推流等核心重要知识点。

设计模式（JAVA语言实现）--20种设计模式附带源码: 课程亮点：课程培训详细的笔记以及实例代码，让学员开始掌握设计模式知识点课程内容：工厂模式、桥接模式、组合模式、装饰器模式、外观模式、享元模式、原型模型、代理模式、单例模式、适配器模式策略模式、模板方法模式、观察者模式、迭代器模式、责任链模式、命令模式、备忘录模式、状态模式、访问者模式课程特色：笔记设计模式，用笔记串连所有知识点，让学员从一点一滴积累，学习过程无压力笔记标题采用关键字标识法，帮助学员更加容易记住知识点笔记以超链接形式让知识点关联起来，形式知识体系采用先概念后实例再应用方式，知识点深入浅出提供授课内容笔记作为课后复习以及工作备查工具部分图表（电脑PC端查看）：

极简JAVA学习营第四期（报名以后加助教微信：eduxy-1）: 想学好JAVA必须要报两万的培训班吗？ Java大神勿入如果你：零基础想学JAVA却不知道从何入手看了一堆书和视频却还是连JAVA的环境都搭建不起来囊中羞涩面对两万起的JAVA培训班不忍直视在职没有每天大块的时间专门学习JAVA 那么恭喜你找到组织了，在这里有： 1. 一群志同道合立志学好JAVA的同学一起学习讨论JAVA 2. 灵活机动的学习时间完成特定学习任务+每日编程实战练习 3. 热心助人的助教和讲师及时帮你解决问题，不按时完成作业小心助教老师的家访哦上一张图看看前辈的感悟：     大家一定迫不及待想知道什么是极简JAVA学习营了吧，下面就来给大家说道说道：什么是极简JAVA学习营？ 1. 针对Java小白或者初级Java学习者； 2. 利用9天时间，每天1个小时时间； 3.通过每日作业 / 组队PK / 助教答疑 / 实战编程 / 项目答辩 / 社群讨论 / 趣味知识抢答等方式让学员爱上学习编程，最终实现能独立开发一个基于控制台的‘库存管理系统’ 的学习模式极简JAVA学习营是怎么学习的？   如何报名？只要购买了极简JAVA一：JAVA入门就算报名成功！  本期为第四期极简JAVA学习营，我们来看看往期学员的学习状态：作业看这里~   助教的作业报告是不是很专业不交作业打屁屁助教答疑是不是很用心   有奖抢答大家玩的很嗨啊     项目答辩终于开始啦   优秀者的获奖感言   这是答辩项目的效果     这么细致的服务，这么好的氛围，这样的学习效果，需要多少钱呢？不要1999，不要199，不要99，只要9.9 是的你没听错，只要9.9以上所有就都属于你了如果你： 1、 想学JAVA没有基础 2、 想学JAVA没有整块的时间 3、 想学JAVA没有足够的预算还等什么？赶紧报名吧，抓紧抢位，本期只招300人，错过只有等时间待定的下一期了   报名请加小助手微信：eduxy-1

2019 AI开发者大会: 2019 AI开发者大会(AI ProCon 2019)是由中国IT社区CSDN主办的AI技术与产业年度盛会。多年经验淬炼，如今蓄势待发：2019年9月6-7日，大会将有近百位中美顶尖AI专家、知名企业代表以及千余名AI开发者齐聚北京，进行技术解读和产业论证。我们不空谈口号，只谈技术，诚挚邀请AI业内人士一起共铸人工智能新篇章！

web网页制作期末大作业: 分享思维,改变世界. web网页制作,期末大作业. 所用技术:html css javascript 分享所学所得

手把手实现Java图书管理系统（附源码）: 【超实用课程内容】本课程演示的是一套基于Java的SSM框架实现的图书管理系统，主要针对计算机相关专业的正在做毕设的学生与需要项目实战练习的java人群。详细介绍了图书管理系统的实现，包括：环境搭建、系统业务、技术实现、项目运行、功能演示、系统扩展等，以通俗易懂的方式，手把手的带你从零开始运行本套图书管理系统，该项目附带全部源码可作为毕设使用。【课程如何观看？】 PC端：https://edu.csdn.net/course/detail/27513 移动端：CSDN 学院APP（注意不是CSDN APP哦）本课程为录播课，课程2年有效观看时长，大家可以抓紧时间学习后一起讨论哦~ 【学员专享增值服务】源码开放课件、课程案例代码完全开放给你，你可以根据所学知识，自行修改、优化下载方式：电脑登录https://edu.csdn.net/course/detail/27513，点击右下方课程资料、代码、课件等打包下载

MySQL数据库面试题（2020最新版）: 文章目录数据库基础知识为什么要使用数据库什么是SQL？什么是MySQL?数据库三大范式是什么mysql有关权限的表都有哪几个MySQL的binlog有有几种录入格式？分别有什么区别？数据类型mysql有哪些数据类型引擎MySQL存储引擎MyISAM与InnoDB区别MyISAM索引与InnoDB索引的区别？InnoDB引擎的4大特性存储引擎选择索引什么是索引？索引有哪些优缺点？索引使用场景（重点）...

2019 Python开发者日-培训: 本次活动将秉承“只讲技术，拒绝空谈”的理念，邀请十余位身处一线的Python技术专家，重点围绕Web开发、自动化运维、数据分析、人工智能等技术模块，分享真实生产环境中使用Python应对IT挑战的真知灼见。此外，针对不同层次的开发者，大会还安排了深度培训实操环节，为开发者们带来更多深度实战的机会。

C++语言基础视频教程: C++语言基础视频培训课程：本课与主讲者在大学开出的程序设计课程直接对接，准确把握知识点，注重教学视频与实践体系的结合，帮助初学者有效学习。本教程详细介绍C++语言中的封装、数据隐藏、继承、多态的实现等入门知识；主要包括类的声明、对象定义、构造函数和析构函数、运算符重载、继承和派生、多态性实现等。课程需要有C语言程序设计的基础（可以利用本人开出的《C语言与程序设计》系列课学习）。学习者能够通过实践的方式，学会利用C++语言解决问题，具备进一步学习利用C++开发应用程序的基础。

零基础学C#编程—C#从小白到大咖: 本课程从初学者角度出发，提供了C#从入门到成为程序开发高手所需要掌握的各方面知识和技术。【课程特点】 1 由浅入深，编排合理； 2 视频讲解，精彩详尽； 3 丰富实例，轻松易学； 4 每章总结配有难点解析文档。 15大章节，228课时，1756分钟与你一同进步！

编程实现学生基本信息管理程序: 编程实现学生基本信息管理程序。学生基本信息包括：学号、姓名、性别、年龄、班级、学院、专业等。具体实现的管理功能如下：（1）输入并显示多个学生的基本信息；（2）可根据需要实现学生信息的添加；（

android 漂亮的UI界面完整的界面设计: 声明：这也是我学习时在网上下载的，鉴于分享精神，并且觉得很不错才上传上来的。。。。。 android 漂亮的UI界面完整的界面设计这是一个完整的UI设计，但是没写动作，这是一个公司程序员的公司任务

Anaconda详细安装及使用教程（带图文）: Anacond的介绍 Anaconda指的是一个开源的Python发行版本，其包含了conda、Python等180多个科学包及其依赖项。因为包含了大量的科学包，Anaconda 的下载文件比较大（约 531 MB），如果只需要某些包，或者需要节省带宽或存储空间，也可以使用Miniconda这个较小的发行版（仅包含conda和 Python）。 Conda是一个开源的包、环境管理器，可以用于...

DirectX修复工具V4.0增强版: DirectX修复工具(DirectX Repair)是一款系统级工具软件，简便易用。本程序为绿色版，无需安装，可直接运行。本程序的主要功能是检测当前系统的DirectX状态，如果发现异常则进行修复

几率大的Redis面试题（含答案）: 本文的面试题如下： Redis 持久化机制缓存雪崩、缓存穿透、缓存预热、缓存更新、缓存降级等问题热点数据和冷数据是什么 Memcache与Redis的区别都有哪些？单线程的redis为什么这么快 redis的数据类型，以及每种数据类型的使用场景，Redis 内部结构 redis的过期策略以及内存淘汰机制【～】 Redis 为什么是单线程的，优点如何解决redis的并发竞争key问题 Red...

相关热词 c# 按行txt c#怎么扫条形码 c#打包html c# 实现刷新数据 c# 两个自定义控件重叠 c#浮点类型计算 c#.net 中文乱码 c# 时间排序 c# 必备书籍 c#异步网络通信

我要提问

javabean12345

haikuokuangtu