spring注入失败

最近想把以前的项目增加的service托给spring处理
[code="java"]


<bean id="userDao" class="com.*.dao.impl.UserDALImpl">
</bean>

[/code]

UserDALImpl是原先先好的DAO层的类,有自己的查询数据库的一些实现.我现在只想把userDao注入到service层里面处理

[code="java"]
UserBusinessImpl

private UserDAL userDAL;

public void setUserDAL(UserDAL userDAL) {
    this.userDAL = userDAL;
}

[/code]

感觉就是简单的注入,还是失败.
spring不熟,各位指点下.
[b]问题补充:[/b]
*号是我项目的 名称,我没写出来,其实是有路径的

UserDALImpl是实现UserDAL 接口

[b]问题补充:[/b]
没有报错信息.

只是在执行
[code="java"]
UserBusinessImpl.java

private UserDAL userDAL;

public void setUserDAL(UserDAL userDAL) {
    this.userDAL = userDAL;
}

public Person getUserFromEXTNO(String extNo) throws Exception {
    return userDAL.getUserFromEXTNO(extNo);
}

[/code]

[code="java"]
public class UserDALImpl extends BaseDAL implements UserDAL {
// 初始化Log
private Logger logger = Logger.getLogger(UserDALImpl.class);
public UserDALImpl() throws Exception {
}

public Person getUserFromEXTNO(String extNo) throws Exception {

执行SQL
}
[/code]
spring配置文件就这2个
[code="java"]
<?xml version="1.0" encoding="UTF-8"?>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd">


<bean id="userDao" class="com.ccsee.happytrip.dao.impl.UserDALImpl">
</bean>


[/code]

报的异常是在执行getUserFromEXTNO方法时候抛空指针,也就是注入失败,没把dao注入到service层中
[b]问题补充:[/b]
[code="java"]

UserDALImpl对象看看调用时是不是new的呢?? 如果是那就肯定错了 UserDALImpl 也得用spring注入 或者用applicationConexst.getbean取[/code]

UserDALImpl对象我是打算把他注入到UserBusinessImpl中去的,在UserBusinessImpl中是用set接口进去的

至于UserDALImpl本身有自己的JDBC连接池以及一系列的操作.
[b]问题补充:[/b]
[code="java"]
不对吧 你是已经从bean工程里取出来了 然后执行dao的方法时候报的错么? 如果取出来了 就证明你配置没错 。。。。。你把堆栈信息贴过来 我看看是在哪掉用的时候出的空指针
[/code]

配置文件的写法应该是对的,服务器启动正常,
但是没有注入成功.在执行到UserBusinessImpl的时候抛空指针,

[2009-12-04 17:08:18,125]-ERROR (UserLoginAction.java:93)|
java.lang.NullPointerException
at com.ccsee.happytrip.service.impl.UserBusinessImpl.getUserFromEXTNO(Us
erBusinessImpl.java:67)
[b]问题补充:[/b]
[code="java"]
UserBusinessImpl 如果不是通过spring get的 后面的照样无法注入成功 听我的试一下 我过去带的人就有这么错的 估计你的问题也是这个[/code]

没有明白你所说的spring get的
按我的理解就是,在action层,也使用同样的set注入.如果是这样的话,我有尝试过,但是是失败的,也是空指针,只不是报在action层了,也就是注入失败.

[b]问题补充:[/b]
[quote]
的确是没有获得到dao 你获得UserBusinessImpl 的方式应该不对吧 你是如何获得UserBusinessImpl 的? 那句代码贴出来看看
[/quote]
UserBusiness business = new UserBusinessImpl();
我是直接new的,我也尝试过像service层那样注入,一样没效果

[code="java"]
看你配置看不出有什么问题,有可能是DAO方法里某行报错了。
[/code]
应该还没到dao层,dao层的LOG都没打出来,应该就属于注入失败.
[b]问题补充:[/b]
[quote]
你new ClassPathXmlApplicationContext()的这个过程就是对配置文件的解析 以及按着你所配置的方式通过反射机制自动给你进行装配 如果没有这个过程 你直接new那就相当于在堆内存上开辟一个空的对象 里面没有任何的东西 所以你取出的dao是空 因为你没往里放东西啊,而UserBusinessImpl userBusinessImpl = (UserManager)factory.getBean("UserBusinessImpl ");是从已经放着解析并且装配好的所有对象的大容器里去取 所以你取出来的是装配好的啊
[/quote]
我把UserBusinessImpl改了下就可以了,
[code="java"]
public Person getUserFromEXTNO(String extNo) throws Exception {
BeanFactory factory = new ClassPathXmlApplicationContext("applicationContext.xml");
UserDAL userDal = (UserDAL)factory.getBean("userDao");
return userDal.getUserFromEXTNO(extNo);
}
[/code]
但是为什么使用set注入不行
[b]问题补充:[/b]
非常谢谢各位的解答

现在的结果是,我在action,service层使用getBean都可以获取到实例,但是使用set注入都是失败的.

[code="java"]





<bean id="userDao" class="com.ccsee.happytrip.dao.impl.UserDALImpl">
</bean>

[/code]

action层
[code="java"]
private UserBusiness userBusiness;

public void setUserBusiness(UserBusiness userBusiness) {
    this.userBusiness = userBusiness;
}

            Person user = userBusiness.getUserFromEXTNO(form.getUserName()
                    .trim());

[/code]

如果使用getBean就行,有朋友说必须都使用spring拖管就行了,我现在 action和service的都放在spring托管中,dao没办法托管必须用原来的.

我想问下原因,谢谢.
[b]问题补充:[/b]
我的struts有加载spring

strust-config.xml
[code="java"]



[/code]

30个回答

你误解了 我的这段代码 是然你写在action里 当执行UserBusiness business = new UserBusinessImpl(); 的时候 可以这么写
BeanFactory factory = new ClassPathXmlApplicationContext("applicationContext.xml");

UserBusiness business = factory.getBean("userBusiness");

这样当你再调用 business.getUserFromEXTNO(“”) 这个方法的时候 就不会报空指针了 因为business里的dao已经通过spring容易注入进来了

com.*.service.impl.UserBusinessImpl 那个*能不能写个别的呀 呵呵
UserDALImpl实例化UserDAL了??

应该不至于,一定是你哪个地方搞出点问题,现在这样看是看不出什么问题

UserDALImpl是实现UserDAL 接口的吧

朋友 你把错误贴出来 帮你分析下。。现在看不来啊

如果没报错 是不是你不是用spring的容器获得的实例啊。? 如果你自己new 就不能自动装配了

把代码贴全了吧 这点看不出问题来

应该是用new的多吧,,,把你源代码贴详细点。

UserDALImpl对象看看调用时是不是new的呢?? 如果是那就肯定错了 UserDALImpl 也得用spring注入 或者用applicationConexst.getbean取

sorry 写错了 我想写的是UserBusinessImpl 呵呵

不会吧,我怀疑是调它个方法,这个方法本身报的异常

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![图片说明](https://img-ask.csdn.net/upload/201804/21/1524291637_361310.png) 项目结构应该是正确的。 ``` @Repository public interface UserDao { public User getById(int id); } ``` Dao层的代码,使用接口。 @Service ``` @Service public class UserService { @Autowired UserDao userDao; public User getById(int id) { return userDao.getById(id); } } ``` service层代码。 controller层注入service。 启动spring boot后会提示dao层没有扫描到,如果@ComponentScan dao层的话,会提示service层注入失败,求解。

Spring boot 集成mybatisplus basemapper 注入失败

报错信息如下 ``` org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userServiceImpl': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [D:\boot_Video_Barrage\target\classes\com\video\barrage\mapper\UserMapper.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessProperties(CommonAnnotationBeanPostProcessor.java:337) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1429) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) ~[spring-boot-2.2.0.RELEASE.jar:2.2.0.RELEASE] at com.video.barrage.MainApplication.main(MainApplication.java:13) ~[classes/:na] Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userMapper' defined in file [D:\boot_Video_Barrage\target\classes\com\video\barrage\mapper\UserMapper.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1803) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:207) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveBeanByName(AbstractAutowireCapableBeanFactory.java:454) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.autowireResource(CommonAnnotationBeanPostProcessor.java:543) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor.java:513) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(CommonAnnotationBeanPostProcessor.java:653) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.annotation.InjectionMetadata$InjectedElement.inject(InjectionMetadata.java:224) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:116) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessProperties(CommonAnnotationBeanPostProcessor.java:334) ~[spring-context-5.2.0.RELEASE.jar:5.2.0.RELEASE] ... 17 common frames omitted Caused by: java.lang.IllegalArgumentException: Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required at org.springframework.util.Assert.notNull(Assert.java:198) ~[spring-core-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.mybatis.spring.support.SqlSessionDaoSupport.checkDaoConfig(SqlSessionDaoSupport.java:122) ~[mybatis-spring-2.0.2.jar:2.0.2] at org.mybatis.spring.mapper.MapperFactoryBean.checkDaoConfig(MapperFactoryBean.java:73) ~[mybatis-spring-2.0.2.jar:2.0.2] at org.springframework.dao.support.DaoSupport.afterPropertiesSet(DaoSupport.java:44) ~[spring-tx-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1862) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1799) ~[spring-beans-5.2.0.RELEASE.jar:5.2.0.RELEASE] ... 30 common frames omitted Disconnected from the target VM, address: '127.0.0.1:50473', transport: 'socket' Process finished with exit code 1 ``` @MapperScan @Mapper 都加了 但还是不管用 求大佬解决

Spring Boot 整合mybatis-plus注入失败

启动失败,注入BaseMapper错误,之前模块正常,新增的模块DAO报错 ``` Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2020-03-19 21:44:39.481 ERROR 2545 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceController': Unsatisfied dependency expressed through field 'invoiceService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceService': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'inputInvoiceDao': FactoryBean threw exception on object creation; nested exception is java.lang.ExceptionInInitializerError at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:744) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:391) at org.springframework.boot.SpringApplication.run(SpringApplication.java:312) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1204) at com.pwc.AdminApplication.main(AdminApplication.java:18) Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'invoiceService': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'inputInvoiceDao': FactoryBean threw exception on object creation; nested exception is java.lang.ExceptionInInitializerError at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596) at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1251) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ... 19 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'inputInvoiceDao': FactoryBean threw exception on object creation; nested exception is java.lang.ExceptionInInitializerError at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:178) at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:101) at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1674) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getObjectForBeanInstance(AbstractAutowireCapableBeanFactory.java:1249) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:330) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1251) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593) ... 32 common frames omitted Caused by: java.lang.ExceptionInInitializerError: null at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at com.sun.proxy.$Proxy174.<clinit>(Unknown Source) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:739) at com.baomidou.mybatisplus.core.override.MybatisMapperProxyFactory.newInstance(MybatisMapperProxyFactory.java:52) at com.baomidou.mybatisplus.core.override.MybatisMapperProxyFactory.newInstance(MybatisMapperProxyFactory.java:57) at com.baomidou.mybatisplus.core.MybatisMapperRegistry.getMapper(MybatisMapperRegistry.java:53) at com.baomidou.mybatisplus.core.MybatisConfiguration.getMapper(MybatisConfiguration.java:128) at org.mybatis.spring.SqlSessionTemplate.getMapper(SqlSessionTemplate.java:318) at org.mybatis.spring.mapper.MapperFactoryBean.getObject(MapperFactoryBean.java:95) at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:171) ... 41 common frames omitted Caused by: java.lang.IllegalStateException: Toolkit not initialized at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:273) at com.sun.javafx.application.PlatformImpl.runLater(PlatformImpl.java:268) at com.sun.javafx.application.PlatformImpl.setPlatformUserAgentStylesheet(PlatformImpl.java:550) at com.sun.javafx.application.PlatformImpl.setDefaultPlatformUserAgentStylesheet(PlatformImpl.java:512) at javafx.scene.control.Control.<clinit>(Control.java:87) ... 56 common frames omitted Disconnected from the target VM, address: '127.0.0.1:51914', transport: 'socket' Process finished with exit code 1 ``` 下面是项目结构,input是新增的,和其他的结构都一样,其他的都正常,报错的信息也是input里面的dao。 ![项目结构](https://img-ask.csdn.net/upload/202003/20/1584638699_358112.png)

Spring boot JdbcTemplate 自动注入失败

``` @Repository public class UserDataImpl implements UserData { @Autowired JdbcTemplate jdbcTemplate; } ``` ``` 2017-07-06 17:37:20.523 ERROR 2990 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause java.lang.NullPointerException: null at com.marnon.service.UserService.userCheck(UserService.java:30) ~[classes/:na] at com.marnon.controller.MyController.logIn(MyController.java:45) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_91] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_91] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_91] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_91] at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1426) ~[springloaded-1.2.6.RELEASE.jar:1.2.6.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.9.RELEASE.jar:4.3.9.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.9.RELEASE.jar:4.3.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) [tomcat-embed-core-8.5.15.jar:8.5.15] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.15.jar:8.5.15] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_91] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_91] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.15.jar:8.5.15] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_91] ```

spring mvc @Autowired 注入失败

配置如下: application-context.xml <?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd" default-autowire="byName"> <context:annotation-config/> <import resource="classpath:spring-mvc/dispatcherContext-servlet.xml"/> </beans> dispatcherContext-servlet.xml <?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:mvc="http://www.springframework.org/schema/mvc" 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-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> <!-- 使Controller中的@RequestMapping 生效--> <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <!-- 解决ajax调用中文乱码问题 --> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/> </list> </property> </bean> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />--> <property name="suffix" value=".jsp" /> </bean> </beans> 被调用的类 package com.webservice.common; import java.util.List; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.HttpVersion; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpRequestBase; import org.apache.http.conn.scheme.PlainSocketFactory; import org.apache.http.conn.scheme.Scheme; import org.apache.http.conn.scheme.SchemeRegistry; import org.apache.http.conn.ssl.SSLSocketFactory; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.impl.conn.PoolingClientConnectionManager; import org.apache.http.params.BasicHttpParams; import org.apache.http.params.CoreConnectionPNames; import org.apache.http.params.HttpParams; import org.apache.http.params.HttpProtocolParams; import org.apache.http.util.EntityUtils; import org.springframework.beans.factory.annotation.Autowired; import com.base.core.log4j.ILog4jManager; public class LocalHttpClient { private static HttpParams httpParams; private static PoolingClientConnectionManager connectionManager; /** * 最大连接数 */ public final static int MAX_TOTAL_CONNECTIONS = 100; /** * 每个路由最大连接数 */ public final static int MAX_ROUTE_CONNECTIONS = 20; /** * 连接超时时间 */ public final static int CONNECT_TIMEOUT = 10000; /** * 读取超时时间 */ public final static int READ_TIMEOUT = 10000; @Autowired private ILog4jManager log4jManager; static { // 设置组件参数, HTTP协议的版本,1.1/1.0/0.9 httpParams = new BasicHttpParams(); HttpProtocolParams.setVersion(httpParams, HttpVersion.HTTP_1_0); HttpProtocolParams.setUserAgent(httpParams, "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0)"); HttpProtocolParams.setUseExpectContinue(httpParams, true); //设置连接超时时间 httpParams.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, CONNECT_TIMEOUT); httpParams.setParameter(CoreConnectionPNames.SO_TIMEOUT, READ_TIMEOUT); //设置访问协议 SchemeRegistry schreg = new SchemeRegistry(); schreg.register(new Scheme("http", 80, PlainSocketFactory.getSocketFactory())); schreg.register(new Scheme("https", 443, SSLSocketFactory.getSocketFactory())); //多连接的线程安全的管理器 connectionManager = new PoolingClientConnectionManager(schreg); connectionManager.setDefaultMaxPerRoute(MAX_ROUTE_CONNECTIONS); //每个主机的最大并行链接数 connectionManager.setMaxTotal(MAX_TOTAL_CONNECTIONS); //客户端总并行链接最大数 } /** * 获取httpClient * * @return */ public static HttpClient getHttpClient() { return new DefaultHttpClient(connectionManager, httpParams); } public String postMethod(String url,List<NameValuePair> list) throws Exception{ HttpPost httppost = new HttpPost(url); UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "utf-8"); entity.toString(); httppost.setEntity(entity); HttpClient client = LocalHttpClient.getHttpClient(); HttpResponse httpResponse = client.execute(httppost); String xmlContent=EntityUtils.toString(httpResponse.getEntity()); String tex = new String(xmlContent.getBytes("ISO-8859-1"),"UTF-8"); //这个地方异常 log4jManager.infoCustomLog(getClass().getName(),"postMethod", tex);**** return tex; } } 单元测试类 package com.base.junit4support; import java.util.ArrayList; import java.util.List; import org.apache.http.NameValuePair; import org.apache.http.message.BasicNameValuePair; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.test.context.ContextConfiguration; import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests; import org.springframework.test.context.junit4.SpringJUnit4ClassRunner; import com.base.core.Constants; import com.base.core.log4j.ILog4jManager; import com.webservice.common.LocalHttpClient; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration(locations = { "classpath:applicationConfiguration-context.xml" }) public class AbstractSpringJUnit4Support extends AbstractJUnit4SpringContextTests { @Autowired protected ILog4jManager log4jManager;; @Test public void say(){ System.out.println("000000"); //这个地方正常 log4jManager.debugCustomLog(getClass().getName(),"say", "正确"); LocalHttpClient localHttpClient = new LocalHttpClient(); List<NameValuePair> list = new ArrayList<NameValuePair>(); try { String xml = localHttpClient.postMethod(Constants.MOBILE_RECHARGE_URL, list); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("wwww"); } 求解。。。。

spring注入自动连接的依赖项失败,注解以及扫描都配好了,为什么 无法注入service?

![图片说明](https://img-ask.csdn.net/upload/201811/12/1542037550_716940.png)![图片说明](https://img-ask.csdn.net/upload/201811/12/1542037902_844706.png)![图片说明](https://img-ask.csdn.net/upload/201811/12/1542037921_69389.png)![图片说明](https://img-ask.csdn.net/upload/201811/12/1542037935_198421.png) ## service实现类 Controller调用service注入失败

spring mvc注入controller失败找不到原因

运行不报错,根目录下的文件可以访问。但是访问不了Controller,打断点运行也进不去, 访问http://localhost:8081/rest/itemcat/list就404找不到页面,求大神解救。 这是springMVC配置文件 ``` <?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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="com.taotao.rest.controller" /> <mvc:annotation-driven /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans> ``` 这是Controller层 ``` package com.taotao.rest.controller; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.MediaType; import org.springframework.http.converter.json.MappingJacksonValue; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.taotao.common.utils.JsonUtils; import com.taotao.rest.pojo.CatResult; import com.taotao.rest.service.ItemCatService; /** * 商品分类列表 * <p>Title: ItemCatController</p> * <p>Description: </p> * <p>Company: www.itcast.com</p> */ @Controller public class ItemCatController { @Autowired private ItemCatService itemCatService; /*@RequestMapping(value="/itemcat/list", produces=MediaType.APPLICATION_JSON_VALUE + ";charset=utf-8") @ResponseBody public String getItemCatList(String callback) { CatResult catResult = itemCatService.getItemCatList(); //把pojo转换成字符串 String json = JsonUtils.objectToJson(catResult); //拼装返回值 String result = callback + "(" + json + ");"; return result; }*/ @RequestMapping("/itemcat/list") @ResponseBody public Object getItemCatList(String callback) { CatResult catResult = itemCatService.getItemCatList(); MappingJacksonValue mappingJacksonValue = new MappingJacksonValue(catResult); mappingJacksonValue.setJsonpFunction(callback); return mappingJacksonValue; } } ``` 这是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="taotao" version="2.5"> <display-name>taotao-portal</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <!-- 加载spring容器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/applicationContext-*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 解决post乱码 --> <filter> <filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- springmvc的前端控制器 --> <servlet> <servlet-name>taotao-portal</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- contextConfigLocation不是必须的, 如果不配置contextConfigLocation, springmvc的配置文件默认在:WEB-INF/servlet的name+"-servlet.xml" --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>taotao-portal</servlet-name> <!-- 伪静态化 --> <url-pattern>*.html</url-pattern> </servlet-mapping> </web-app> ```

Struts和Spring整合后访问Action注入失败

如题,刚刚接触SSH,不知道是哪配置出问题了, 蛋疼的是单元测试中用ClassPathXmlApplicationContext读取spring配置文件却通过了- - Struts2配置: <struts> <!-- 设置浏览器是否缓存静态内容,默认值为true(生产环境下使用),开发阶段最好关闭 --> <constant name="struts.serve.static.browserCache" value="false" /> <!-- 当struts的配置文件修改后,系统是否自动重新加载该文件,默认值为false(生产环境下使用),开发阶段最好打开 --> <constant name="struts.configuration.xml.reload" value="true" /> <!-- 开发模式下使用,这样可以打印出更详细的错误信息 --> <constant name="struts.devMode" value="true" /> <!-- <constant name="struts.action.extension" value="do,app" /> --> <constant name="struts.objectFactory" value="org.apache.struts2.spring.StrutsSpringObjectFactory" /> <!-- Configuration for the default package. --> <package name="default" extends="struts-default,json-default"> <action name="*_*" method="{2}" class="org.crush.mlms.action.{1}Action"> <result type="json"> <param name="success">responseJson</param> </result> </action> </package> </struts> Spring配置: <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"> <property name="url" value="jdbc:mysql://localhost:3306/mlms"></property> <property name="username" value="root"></property> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource"> <ref bean="dataSource" /> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> org.hibernate.dialect.MySQLDialect </prop> </props> </property> <property name="mappingResources"> <list> <value>org/crush/mlms/domain/Test.hbm.xml</value> </list> </property> </bean> <bean id="testAction" class="org.crush.mlms.action.TestAction"> <property name="testService"> <ref bean="TestService" /> </property> <property name="testDao"> <ref bean="testDAO" /> </property> <property name="factory"> <ref bean="sessionFactory" /> </property> </bean> <bean id="testDAO" class="org.crush.mlms.domain.TestDAO"> <property name="sessionFactory"> <ref bean="sessionFactory" /> </property> </bean> <bean id="TestService" class="org.crush.mlms.service.TestService"> <property name="testDao"> <ref bean="testDAO" /> </property> </bean> web.xml配置: <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_3_0.xsd" version="3.0"> <display-name>MLMS</display-name> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:Bean.xml</param-value> </context-param> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file> index.html </welcome-file> </welcome-file-list> </web-app>

Spring整合Mybatis关于Dao注入失败的问题求解

抛出异常 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'adminService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private pers.zww.grad.dao.IAdminDao pers.zww.grad.service.impl.AdminServiceImpl.adminDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [pers.zww.grad.dao.IAdminDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value=adminDao)} 此为自动生成的Mapper,我加了注解@Repository package pers.zww.grad.dao; import org.springframework.stereotype.Repository; import pers.zww.grad.vo.Admin; @Repository("adminDao") public interface IAdminDao { int deleteByPrimaryKey(String id); int insert(Admin record); int insertSelective(Admin record); Admin selectByPrimaryKey(String id); int updateByPrimaryKeySelective(Admin record); int updateByPrimaryKey(Admin record); Integer getCountByName(String name); Integer getCountByNameAndPass(String name,String password); } 这是Service里面注入 package pers.zww.grad.service.impl; 、、、 @Service("adminService") public class AdminServiceImpl implements IAdminService { @Autowired @Qualifier("adminDao") private IAdminDao adminDao; @Override public int deleteByPrimaryKey(String id) { // TODO Auto-generated method stub return 0; } 配置文件都已扫描过了,而且相关mybatis的如下: <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 自动扫描mapping.xml文件 --> <property name="mapperLocations" value="classpath:pers/zww/grad/mapping/*.xml"></property> </bean> <!-- DAO接口所在包名,Spring会自动查找其下的类 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="pers.zww.grad.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean>

关于springMVC注解注入失败的问题

注解都写了,没发现哪有遗漏,个人认为是环境配置的问题,求解答 dao ``` package dao; import java.util.List; import org.springframework.orm.hibernate4.support.HibernateDaoSupport; import org.springframework.stereotype.Repository; import entity.Food; @Repository public class FoodDao extends HibernateDaoSupport{ ``` service ``` package Logic; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import dao.FoodDao; import entity.Food; @Service public class FoodLogic { ``` controller ``` import entity.Food; @Controller @RequestMapping("") public class AddFoodController extends AbstractController{ @RequestMapping("/list") public ModelAndView getList(HttpServletRequest request, HttpServletResponse response) { List<Food> foodlist = this.foodLogic.selectAllFood(); response.setCharacterEncoding("UTF-8"); try { PrintWriter write = response.getWriter(); write.write(getJson(foodlist)); write.flush(); write.close(); } catch (IOException e) { e.printStackTrace(); } return this.listView(); } @ResponseBody public String getJson(List list) { JSONObject jsonDate = new JSONObject(); jsonDate.put("list", list); return jsonDate.toString(); } } package Controller.foodController; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.servlet.ModelAndView; import Logic.FoodLogic; public class AbstractController { @Autowired public FoodLogic foodLogic; public ModelAndView listView() { return new ModelAndView("food/list"); } public ModelAndView editView() { return new ModelAndView("food/edit"); } public ModelAndView viewView() { return new ModelAndView("food/view"); } } ``` xml ``` <?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: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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <!-- 加载Spring的全局配置文件 --> <!-- scan the package and the sub package --> <context:component-scan base-package="Controller"/> <!-- don't handle the static resource --> <mvc:default-servlet-handler /> <!-- if you use annotation you must configure following setting --> <mvc:annotation-driven /> <!-- configure the InternalResourceViewResolver --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver"> <!-- 前缀 --> <property name="prefix" value="/htm/" /> <!-- 后缀 --> <property name="suffix" value=".html" /> </bean> ``` 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_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>OrderMealManager</display-name> <!-- <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> --> <!-- 监听spring上下文容器 --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <!--configure the setting of springmvcDispatcherServlet and configure the mapping--> <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:springmvc-servlet.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> ``` 错误信息 ``` 八月 08, 2017 12:59:18 下午 org.springframework.context.support.AbstractApplicationContext refresh 警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'addFoodController': Unsatisfied dependency expressed through field 'foodLogic': No qualifying bean of type [Logic.FoodLogic] found for dependency [Logic.FoodLogic]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [Logic.FoodLogic] found for dependency [Logic.FoodLogic]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 八月 08, 2017 12:59:18 下午 org.springframework.web.servlet.FrameworkServlet initServletBean 严重: Context initialization failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'addFoodController': Unsatisfied dependency expressed through field 'foodLogic': No qualifying bean of type [Logic.FoodLogic] found for dependency [Logic.FoodLogic]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [Logic.FoodLogic] found for dependency [Logic.FoodLogic]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} ```

大学四年自学走来,这些私藏的实用工具/学习网站我贡献出来了

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程序员请照顾好自己,周末病魔差点一套带走我。

程序员在一个周末的时间,得了重病,差点当场去世,还好及时挽救回来了。

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