我正在尝试使用Spring和Hibernate编写应用程序，而且我是一个完整的新手 . 无法摆脱此错误消息：
SEVERE：异常将上下文初始化事件发送到类的监听器实例org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanCreationException：创建名为'commentService'的bean时出错：注入自动连接的依赖项失败;嵌套异常是org.springframework.beans.factory.BeanCreationException：无法自动装配字段：private com.fiskin.comm.server.dao.CommentDAO com.fiskin.comm.server.services.CommentServiceImpl.commentDAO;嵌套异常是org.springframework.beans.factory.NoSuchBeanDefinitionException：找不到类型为[com.fiskin.comm.server.dao.CommentDAO]的匹配bean依赖：预期至少有1个bean符合此依赖关系的autowire候选资格 . 依赖注释：{@ org.springframework.beans.factory.annotation.Autowired（required = true）}
这是我的评论DAO：
package com.fiskin.comm.server.dao;
@Repository("commentDAO")
public class CommentDAO extends JpaDAO<Long, Comment> {
@Autowired
EntityManagerFactory entityManagerFactory;
@PostConstruct
public void init() {
super.setEntityManagerFactory(entityManagerFactory);
}
}
CommentServiceImpl：
package com.fiskin.comm.server.services;
@Service("commentService")
public class CommentServiceImpl implements CommentService {
@Autowired
private CommentDAO commentDAO;
@PostConstruct
public void init() throws Exception {
}
@PreDestroy
public void destroy() {
}
@Override
@Transactional(propagation=Propagation.REQUIRED, rollbackFor=Exception.class)
public void addComment(Date d, String t) {
Comment c = new Comment(d, t);
commentDAO.add(c);
}
@Override
public List<Comment> allComments() {
return commentDAO.all();
}
@Override
public List<Comment> getCommentsByDate(Date from, Date to) {
return commentDAO.getByDate(from, to);
}
}
和applicationContext的一个片段：
<context:component-scan base-package="com.fiskin.comm" >
<context:include-filter type="aspectj" expression="com.fiskin.comm.*" />
</context:component-scan>
<tx:annotation-driven />
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
<property name="persistenceUnitName" value="MyPersistenceUnit" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
任何帮助，将不胜感激 .
UPD：完成堆栈跟踪
ноя 23, 2013 4:21:28 PM org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext
ноя 23, 2013 4:21:30 PM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextInitialized()
ноя 23, 2013 4:21:30 PM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextInitialized()
ноя 23, 2013 4:21:30 PM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLocationsCache', 'org.apache.jasper.compiler.TldLocationsCache@100b6ba')
ноя 23, 2013 4:59:27 PM org.apache.catalina.core.ApplicationContext log
INFO: SessionListener: contextDestroyed()
ноя 23, 2013 4:59:27 PM org.apache.catalina.core.ApplicationContext log
INFO: ContextListener: contextDestroyed()
ноя 23, 2013 5:00:20 PM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring root WebApplicationContext
ноя 23, 2013 5:00:23 PM org.apache.catalina.core.StandardContext listenerStart
SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'commentService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.fiskin.comm.server.dao.CommentDAO com.fiskin.comm.server.services.CommentServiceImpl.commentDAO; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.fiskin.comm.server.dao.CommentDAO] 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)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:286)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1055)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:871)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:272)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:196)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:983)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1660)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.fiskin.comm.server.dao.CommentDAO com.fiskin.comm.server.services.CommentServiceImpl.commentDAO; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.fiskin.comm.server.dao.CommentDAO] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:507)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:84)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:283)
... 27 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.fiskin.comm.server.dao.CommentDAO] 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)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:901)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:770)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:685)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:478)
... 29 more