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自动布线依赖项的注入失败;嵌套的例外是org.springframework.beans.factory.BeanCreationException：

2014-02-15 76 views
2

我想创建例如从用的Apache Tomcat和PostgreSQL Spring的事务而获得自动装配依赖的错误注入失败自动布线依赖项的注入失败;嵌套的例外是org.springframework.beans.factory.BeanCreationException：

异常

javax.servlet.ServletException: Servlet.init() for servlet dispatcher threw exception 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    java.lang.Thread.run(Thread.java:724) 

root cause 

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loginController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private DAO.TblUserManager_DAO Controllers.LoginController.user; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [DAO.TblUserManager_DAO] is defined: expected single matching bean but found 2: [tblUserManager_DAOImpl, TblUserManager_DAOImpl] 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) 
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) 
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) 
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) 
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585) 
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) 
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) 
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645) 
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508) 
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449) 
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133) 
    javax.servlet.GenericServlet.init(GenericServlet.java:212) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    java.lang.Thread.run(Thread.java:724) 

root cause 

org.springframework.beans.factory.BeanCreationException: Could not autowire field: private DAO.TblUserManager_DAO Controllers.LoginController.user; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [DAO.TblUserManager_DAO] is defined: expected single matching bean but found 2: [tblUserManager_DAOImpl, TblUserManager_DAOImpl] 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:506) 
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) 
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) 
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) 
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) 
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585) 
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) 
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) 
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645) 
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508) 
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449) 
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133) 
    javax.servlet.GenericServlet.init(GenericServlet.java:212) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    java.lang.Thread.run(Thread.java:724) 

root cause 

org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [DAO.TblUserManager_DAO] is defined: expected single matching bean but found 2: [tblUserManager_DAOImpl, TblUserManager_DAOImpl] 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:800) 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:707) 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478) 
    org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) 
    org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517) 
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) 
    org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) 
    org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) 
    org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) 
    org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) 
    org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585) 
    org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) 
    org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) 
    org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:631) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:588) 
    org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:645) 
    org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:508) 
    org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:449) 
    org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:133) 
    javax.servlet.GenericServlet.init(GenericServlet.java:212) 
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    java.lang.Thread.run(Thread.java:724)

我dispacher-servlet.xml中

<?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:aop="http://www.springframework.org/schema/aop" 
     xmlns:mvc="http://www.springframework.org/schema/mvc" 
     xmlns:context="http://www.springframework.org/schema/context" 
     xmlns:tx="http://www.springframework.org/schema/tx" 
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd 
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd 
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd 
     http://www.springframework.org/schema/mvc 
     http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd   
     http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context-2.5.xsd"> 

    <context:annotation-config /> 
    <context:component-scan base-package="Controllers" /> 
    <context:component-scan base-package="DAO" /> 
    <mvc:annotation-driven /> 
    <tx:annotation-driven transaction-manager="transactionManager"/> 


    <bean id="viewResolver" 
      class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
      p:prefix="/WEB-INF/jsp/" 
      p:suffix=".jsp" /> 

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> 
     <property name="driverClassName" value="org.postgresql.Driver" /> 
     <property name="url" value="jdbc:postgresql://localhost:5432/car" /> 
     <property name="username" value="----" /> 
     <property name="password" value="-----" /> 
    </bean> 

    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 
     <property name="annotatedClasses" > 
      <list> 
       <value>DAOModel.Tblusers</value> 
       <value>DAOModel.Tblcars</value> 
      </list> 
     </property> 
     <property name="dataSource" ref="dataSource" /> 
     <property name="packagesToScan" value="DAOModel" /> 
     <property name="hibernateProperties"> 
      <props> 
       <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop> 
       <prop key="hibernate.show_sql">true</prop> 
      </props> 
     </property> 
     <!-- <property name="configurationClass" value="org.hibernate.cfg.AnnotationConfiguration" /> --> 
    </bean> 

    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" > 
     <property name="sessionFactory" ref="sessionFactory"/> 
    </bean> 
    <bean id = "Tblusers_DAOImpl" class="DAO.Tblusers_DAOImpl"> 
     <property name="sessionFactory" ref="sessionFactory"/> 
    </bean> 
    <bean id = "TblUserManager_DAOImpl" class="DAO.TblUserManager_DAOImpl"> 

    </bean> 
</beans>

我的仓库，服务组件

@Component 
    public interface Tblusers_DAO { 
     public void adduser(Tblusers user); 
    } 


    @Repository 
    public class Tblusers_DAOImpl implements Tblusers_DAO{ 

     @Autowired 
     private SessionFactory sessionFactory; 

     @Override 
     public void adduser(Tblusers user) { 
      this.getSessionFactory().getCurrentSession().saveOrUpdate(user); 
     } 


     public SessionFactory getSessionFactory() { 
      return sessionFactory; 
     } 


     public void setSessionFactory(SessionFactory sessionFactory) { 
      this.sessionFactory = sessionFactory; 
     } 
    } 



@Component 
public interface TblUserManager_DAO { 
    public void adduser(Tblusers user); 
} 



@Service 
public class TblUserManager_DAOImpl implements TblUserManager_DAO{ 

    @Autowired 
    private TblUserManager_DAO dao; 

    @Override 
    @Transactional 
    public void adduser(Tblusers user) { 
     dao.adduser(user); 
    } 

    public void setDao(TblUserManager_DAO dao) { 
     this.dao = dao; 
    } 

}

和控制器

public class LoginController { 

    @Autowired 
    private TblUserManager_DAO user; 
    @RequestMapping(value = "/Login", method = RequestMethod.POST) 
    public ModelAndView setLgin(@ModelAttribute("LoginModel") LoginModel login) { 
     ModelAndView model = new ModelAndView(); 
     Tblusers user2=new Tblusers(); 
     user2.setTblusersId(3); 
     user2.setTblusersFamily(login.getUsername()); 
     user2.setTblusersPassword(login.getPassword()); 
     user.adduser(user2); 
     model.addObject("Hello", login.getUsername()); 
     return model; 
    } 
public void setUser(TblUserManager_DAO user) { 
     this.user = user; 
    } 

}

来源

2014-02-15 ATJVS

+0

[Spring自动装配中的BeanCreationException]的可能重复（http://stackoverflow.com/questions/9408721/beancreationexception-in-spring-autowiring） –

回答

3

当组件扫描类与@Component，@Repository，@Service，@Configuration等注释，春隐式创建为它的bean。当你显式声明一个bean时，它也为它创建一个bean，即。这

<bean id = "Tblusers_DAOImpl" class="DAO.Tblusers_DAOImpl"> 
    <property name="sessionFactory" ref="sessionFactory"/> 
</bean> 
<bean id = "TblUserManager_DAOImpl" class="DAO.TblUserManager_DAOImpl">

所以现在，你有两个豆TblUserManager_DAOImpl和Tblusers_DAOImpl。春天不知道哪一个注入像

@Autowired 
private TblUserManager_DAO user;

因为有两个候选人。要么删除<bean>声明，要么使用类似@Qualified的资格来限定注入目标，以选择合适的bean。

Here's the documentation.通过它来了解组件扫描的全过程。

由于JB Nizet stated below，你应该只用@Component或任何其专业化的注释实际的实现类。从语义上考虑，接口不是组件，不能为接口创建bean。只有实际的类，接口的实现可以是一个组件。

来源

2014-02-15 16:43:18

+1

+1。并且不要使用@Component注释bean的接口。只有实现应该注释。 –

+0

当我在Controller中添加@Qualifier（“user”）时，此解决方案不起作用。 – ATJVS

+0

@ATJVS向我解释为什么你会用'用户'值来限定它。你为什么认为这应该起作用？ –

2

无论是通过xml文件beandefenition条目，或通过像@零部件，@库，@ Service.Moreover注解注册您的豆类，

<context:annotation-config/> and <context:component-scan/>

这些元素无论是在你的code.You使用可以简单地使用<context:component-scan/>适当，因为它会做与其他同样的事情，也为了避免模糊

来源

2014-04-12 16:50:20 Magesh

0

无论何时注入任何对象，您都必须提供setter和getter方法。它会解决你的问题。

来源

2015-07-14 22:00:47

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