我正在尝试使用 AspectJ,我的项目运行正常。但是当我尝试使用 AspectJ 时,注入无法正常工作。如果我不使用 AspectJ,它会再次起作用。
我包含在我的 pom.xml 中
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.6.11</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.11</version>
</dependency>
我的配置文件:
<aop:aspectj-autoproxy />
<tx:annotation-driven />
<!-- Database Configuration -->
<import resource="../database/DataSource.xml"/>
<!-- Auto scan the components -->
<context:component-scan base-package="es.rooms.db.spring.dao" />
<context:component-scan base-package="es.rooms.util" />
<!-- Aspect -->
<bean id="logAspect" class="es.rooms.util.LoggingAspect" />
我正在对我的课程使用注释:
@Repository("RoomDAO")
public class RoomDAO extends JdbcDaoSupport implements IRoomDAO{
@Autowired
private PlayerDAO playerDAO;
我不知道我是否必须扫描我的 AspectJ 课程,反正我做了。我试图将 PlayerDAO 标记为 required=false,并且我可以检查是否调用了 LoggingAspect,但是当 RoomDAO 将调用 PlayerDAO 时,我得到了 NullPointException。为什么我使用 AspectJ 时不能 spring 注入 PlayerDAO?
@Aspect
public class LoggingAspect {
@Before("execution(* es.rooms.db.spring.dao.*.*(..))")
public void logBefore(JoinPoint joinPoint) {
System.out.println("!!!!!!!!!!!!!!logBefore() is running! ->" + joinPoint.getSignature().getName());
System.out.println("******");
}
这是错误:
04-jun-2013 11:36:46 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry destroySingletons
INFO: Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@61acfa31: defining beans [org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource,playerDAO,RoomDAO,userDAO,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,manageRooms,messagesGcm,transactionManager,logAspect,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; root of factory hierarchy
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'RoomDAO': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private es.rooms.db.spring.dao.PlayerDAO es.rooms.db.spring.dao.RoomDAO.playerDAO; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [es.rooms.db.spring.dao.PlayerDAO] 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:287)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
at es.rooms.server.RoomsServer.<init>(RoomsServer.java:23)
at es.rooms.server.RoomsServer.main(RoomsServer.java:61)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private es.rooms.db.spring.dao.PlayerDAO es.rooms.db.spring.dao.RoomDAO.playerDAO; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [es.rooms.db.spring.dao.PlayerDAO] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:506)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
... 14 more
谢谢你。
更新:
我修复了它添加
<aop:aspectj-autoproxy proxy-target-class="true"/>
但是,我不知道为什么会这样,如果有人可以解释我,我很感激。