mybatis已经添加了@Mapper注解,为什么测试的时候报空指针？_course

这个类在com.lb.springcloud.dao层下，并且添加了@Mapper  这是对应的xml文件  测试代码如下  报错  真的是莫名其妙啊，求各路大神看看

为什么调用Mapper或者service时，报空指针错误_course

代码如下 ``` @Autowired InformationMapper mapper; @Test public void test01(){ System.out.println(mapper.selectByPrimaryKey(1)); } ``` 报错信息如下 ``` java.lang.NullPointerException at com.viready.socket.test.test01(test.java:35) 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:606) 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$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) ```

springboot项目启动总是报dao层bean创建异常，但是我已经加了@MapperScan注解也没用_course

2019-04-11 17:40:14.714 WARN 8223 --- o.a.c.loader.WebappClassLoaderBase : The web application appea

使用mybatis时sqlsession总是空指针异常_course

我的xml配置文件如下: ``` <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <properties resource="mysql.properties"/> <settings> <setting name="logImpl" value="LOG4J"></setting> </settings> <typeAliases> <typeAlias alias="User" type="ssm.pojo.User" /> </typeAliases> <environments default="development"> <environment id="development"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="${driver}"/> <property name="url" value="${url}"/> <property name="username" value="${username}"/> <property name="password" value="${password}"/> </dataSource> </environment> </environments> <mappers> <mapper resource="ssm/dao/UserMapper.xml"/> </mappers> </configuration> ``` 获取session代码如下: ``` public class Test { private static SqlSessionFactory sf; static{ try { InputStream inputStream=Resources.getResourceAsStream("mybatis-config.xml"); sf= new SqlSessionFactoryBuilder().build(inputStream); } catch (Exception e) { // TODO: handle exception } } @org.junit.Test public void test() { SqlSession session=sf.openSession(false); List<User> list=session.selectList("ssm.dao.UserMapper.selectAll"); for (User user : list) { System.out.println(user.getUserName()); } } } ```

mybatis service调用dao层方法报空指针异常_course

xml: <context:component-scan base-package="cn.xd.forum.service"/> dao层是接口 service: @Service("userSer

mybatis整合spring mapper注入报空指针_course

今天做mybatis和spring的整合，发现注入的StudentMapper居然没有注入，不知道是什么原因， service层的@Resource(name="studentMapper") 无论是

Spring自动装配时Mapper为空指针_course

各位，使用spring3自动扫描mapper为null。我的配置文件如下 1）application.xml <context:annotation-config /> ... <bean id="s

最近在整一个mybatis的测试，其中一个类报空指针异常，代码及异常如下_course

package com.yihaomen.test; import java.io.Reader; import java.util.List; import org.apache.ibatis.io

Mybatis的一个小DEMO，报空指针异常，新手求教。_course

先说下用到的几个文件 数据库用的表： jeff.zhan.book\src\main\java\bean\Books.java ：（就是一个javabean，设了3个属性） package bean;

SSM的serviceImpl中调用dao接口的方法报空指针异常，求大神支招_course

用SSM写的项目，需要实现的功能是从第三方接口获取数据，然后将数据保存到服务器上的数据库，数据获取正常，但是调用dao接口的方法是报空指针异常，请问是什么原因图片说明](https://img-ask.csdn.net/upload/201709/21/1505956934_524659.png)

springmvc+mybatis service层 空指针错误。。。。。。_course

严重: Servlet.service() for servlet in context with path threw exception with root cause java.lang.Nul

mybaitis springmvc整合空指针异常_course

这是我的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"> <!-- spring mvc 配置 --> <servlet> <servlet-name>mvcdemo</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>mvcdemo</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- spring 配置 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 指定spring bean配置文件所在位置 --> <context-param> <!-- 这个是固定写法contextConfigLocation --> <param-name>contextConfigLocation</param-name> <param-value>classpath:config/applicationContext.xml</param-value> </context-param> </web-app> applicationContex.xml文件 <context:property-placeholder location="classpath:config/db.properties" /> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${driver}" p:url="${url}" p:username="${username}" p:password="${password}" p:maxActive="10" p:maxIdle="10"> </bean> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- dataSource属性指定要用到的连接池 --> <property name="dataSource" ref="dataSource" /> <!-- configLocation属性指定mybatis的核心配置文件 --> <property name="configLocation" value="classpath:config/Configuration.xml" /> <!-- 所有配置的mapper文件 --> <property name="mapperLocations" value="classpath:mapper/*.xml"></property> </bean> <bean id="propertyMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"> <property name="mapperInterface" value="wang.dao.IPropertyDao"></property> <property name="sqlSessionFactory" ref="sqlSessionFactory"></property> </bean> 这里是mvcdemo-servlet.xml文件 <context:annotation-config/> <!-- spring扫描器，用于实现bean自动载入UserController中 --> <context:component-scan base-package="wang.controller"/> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/property/"/> <property name="suffix" value=".jsp"/> </bean> IPropertyDao层 package wang.dao; import java.util.List; import wang.model.Property; public interface IPropertyDao { public List<Property> selectProperty(); } property.xml文件 <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="wang.dao.IPropertyDao"> <select id="selectProperty" resultType="wang.model.Property"> select * from property </select> </mapper> 最后是controller层 package wang.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import wang.dao.IPropertyDao; import wang.model.Property; @Controller @RequestMapping("/property") public class PropertyController { private IPropertyDao propertyDao; private Property property; @RequestMapping("/show") public String show(Model model){ System.out.println(propertyDao.selectProperty()); // property = propertyDao.selectProperty(); // model.addAttribute("property", property); return "/list"; } public IPropertyDao getPropertyDao() { return propertyDao; } public void setPropertyDao(IPropertyDao propertyDao) { this.propertyDao = propertyDao; } public Property getProperty() { return property; } public void setProperty(Property property) { this.property = property; } } 运行后错误500， debug发现propertyDao.selectProperty()是空的，请问大神，是哪里错啦？

myBatis中的莫名其妙的java.lang.NullPointerException，求指教_course

xml： <sql id="querywheresrlnodate"> <!-- ognl访问静态方法的表达式 为@class@method(args),以下为调用Ognl.isNotEmpty()方法,还有其它方法如isNotBlank()可以使用，具体请查看Ognl类 --> <where> <if test="@Ognl@isNotEmpty(h_srlno)"> AND SRLNO = '${h_srlno}' </if> <if test="@Ognl@isNotEmpty(h_date)"> AND URGEDATE = '${h_date}' </if> </where> </sql> <select id="findBySrlnoDate" parameterType="java.util.HashMap" resultType="com.mf.cntrtmng.entity.BsnsOverdueUrge"> SELECT <include refid="selectId" /> FROM bsns_overdue_urge <include refid="querywheresrlnodate"/> </select> DAO： public BsnsOverdueUrge findBySrlnoDate(Map params) throws DataAccessException; Serviceimpl： public boolean exist(Map params) { System.out.println("=====搜索出来的"); System.out.println(params); if(bsnsOverdueUrgeDao.findBySrlnoDate(params)==null) return true; else return false; } 错误日志： =====搜索出来的 {h_srlno=JH201505281535107052, h_date=20150601} 2015-06-01 15:19:42,922 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - Creating a new SqlSession 2015-06-01 15:19:42,922 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - Registering transaction synchronization for SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d41567b] 2015-06-01 15:19:42,924 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - JDBC Connection [jdbc:mysql://localhost:3306/microfinance?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true, UserName=root@localhost, MySQL-AB JDBC Driver] will be managed by Spring 2015-06-01 15:19:42,925 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - ooo Using Connection [jdbc:mysql://localhost:3306/microfinance?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true, UserName=root@localhost, MySQL-AB JDBC Driver] 2015-06-01 15:19:42,928 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - ==> Preparing: select count(1) from (SELECT NO, SRLNO, CLNTNO, URGEID, URGENAME, URGEDATE FROM bsns_overdue_urge WHERE SRLNO = 'JH201505281535107052' AND URGEDATE = '20150601') tmp_count 2015-06-01 15:19:42,929 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - ==> Parameters: 2015-06-01 15:19:42,930 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d41567b] 2015-06-01 15:19:42,930 DEBUG [http-bio-8080-exec-3] (AbstractPlatformTransactionManager.java:843) - Initiating transaction rollback 2015-06-01 15:19:42,931 DEBUG [http-bio-8080-exec-3] (DataSourceTransactionManager.java:279) - Rolling back JDBC transaction on Connection [jdbc:mysql://localhost:3306/microfinance?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true, UserName=root@localhost, MySQL-AB JDBC Driver] 2015-06-01 15:19:42,932 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - Transaction synchronization rolling back SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d41567b] 2015-06-01 15:19:42,932 DEBUG [http-bio-8080-exec-3] (JakartaCommonsLoggingImpl.java:46) - Transaction synchronization closing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@6d41567b] 2015-06-01 15:19:42,933 DEBUG [http-bio-8080-exec-3] (DataSourceTransactionManager.java:322) - Releasing JDBC Connection [jdbc:mysql://localhost:3306/microfinance?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&autoReconnect=true, UserName=root@localhost, MySQL-AB JDBC Driver] after transaction org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.lang.NullPointerException ### The error may exist in file [E:\SpringSource\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\microfinance20150203\WEB-INF\classes\com\mf\cntrtmng\entity\mapper\bsnsoverdueurge-mapper.xml] ### The error may involve com.mf.cntrtmng.dao.BsnsOverdueUrgeDao.findBySrlnoDate-Inline ### The error occurred while setting parameters ### Cause: java.lang.NullPointerException 2015-06-01 15:19:42,933 DEBUG [http-bio-8080-exec-3] (DataSourceUtils.java:332) - Returning JDBC Connection to DataSource at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:365) at com.sun.proxy.$Proxy11.selectOne(Unknown Source) at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:160) at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:63) at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:43) at com.sun.proxy.$Proxy114.findBySrlnoDate(Unknown Source) at com.mf.cntrtmng.service.impl.BsnsOverdueUrgeServiceImpl.exist(BsnsOverdueUrgeServiceImpl.java:128) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:319) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at com.sun.proxy.$Proxy115.exist(Unknown Source) at com.mf.aftrmng.controller.LoanWarnController.showUrgeInfo(LoanWarnController.java:310) 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: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.doGet(FrameworkServlet.java:778) at javax.servlet.http.HttpServlet.service(HttpServlet.java:620) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.mf.interceptor.HeadInterceptor.doFilter(HeadInterceptor.java:43) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918) at java.lang.Thread.run(Thread.java:662) 从日志里面打印的SQL，可以在数据库中搜索，怎么返回值变成了count（），我不是在xml中配置的返回值类型为一个对象类型么“resultType="com.mf.cntrtmng.entity.BsnsOverdueUrge"？”然后包了莫名其妙的空指针错误，求大神帮忙看看，小弟感激不尽~~

spring注入失败，报空指针异常，网上搜了很多方法没解决，路过的大神请帮个忙_course

以下是我自己做的例子：使用全注解的形式 DAO层： package Impl.DAOImpl; import javax.annotation.Resource; import org.springf

SpringMVC+Mybatis调用后台报空指针异常，代码没查出错误，页面也有参数传进来，求解答_course

[DEBUG]2015-08-12 11:07:30,234 org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver Resolving exception from handler [public java.util.Map<java.lang.String, java.lang.Object> cn.sg.controller.BackStageController.QueStoreList(javax.servlet.http.HttpServletRequest)]: java.lang.NullPointerException [DEBUG]2015-08-12 11:07:30,236 org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver Resolving exception from handler [public java.util.Map<java.lang.String, java.lang.Object> cn.sg.controller.BackStageController.QueStoreList(javax.servlet.http.HttpServletRequest)]: java.lang.NullPointerException [DEBUG]2015-08-12 11:07:30,236 org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver Resolving exception from handler [public java.util.Map<java.lang.String, java.lang.Object> cn.sg.controller.BackStageController.QueStoreList(javax.servlet.http.HttpServletRequest)]: java.lang.NullPointerException [DEBUG]2015-08-12 11:07:30,236 org.springframework.web.servlet.DispatcherServlet Could not complete request java.lang.NullPointerException at cn.sg.controller.BackStageController.QueStoreList(BackStageController.java:45) 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:219) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:100) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:604) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:565) 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.doGet(FrameworkServlet.java:778) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) 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:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) 八月 12, 2015 11:07:30 上午 org.apache.catalina.core.StandardWrapperValve invoke 严重: Servlet.service() for servlet [sasmvc] in context with path [/CUPBOARD] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException at cn.sg.controller.BackStageController.QueStoreList(BackStageController.java:45) 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:219) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:100) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:604) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:565) 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.doGet(FrameworkServlet.java:778) at javax.servlet.http.HttpServlet.service(HttpServlet.java:621) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) 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:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)