AspectJ的五大通知核心配置和注解实现

配置实现 

<bean id="userService" class="com.spring.test6_aopAspectJ.UserServiceImpl"></bean>
   
   <bean id="myAspect" class="com.spring.test6_aopAspectJ.MyAspect"></bean>
   <aop:config>
   	<aop:aspect ref="myAspect">
   		<aop:pointcut expression="execution(* com.spring.test6_aopAspectJ.UserServiceImpl.*(..))" id="myPointCut"/>
   		<!-- 前置通知配置 -->
   		<!-- <aop:before method="myBefore" pointcut-ref="myPointCut"/> -->
   		<!-- 后置通知 -->
   		<!-- <aop:after-returning method="afterReturning" pointcut="execution(* com.spring.test6_aopAspectJ.UserServiceImpl.*(..))"/> -->
   		<!-- 环绕通知 -->
   		<!-- <aop:around method="arount" pointcut-ref="myPointCut" arg-names="pjp"/> -->
   		<!-- 异常通知 -->
   		<!-- <aop:after-throwing method="afterThrowing" pointcut-ref="myPointCut"/> -->
   		<!-- 最终通知 -->
   		<aop:after method="after" pointcut-ref="myPointCut"/>
   	</aop:aspect>
   </aop:config>

 在环绕通知方法的中必须要传入参数，而且这个参数必须是org.aspectj.lang.JoinPoint的实现类ProceedingJoinPoint,并且参数如果不是myJoinPoint的情况下，在xml配置环绕通知时，需要知道参数名arg-names="参数名"，并且环绕通知方法必须返回一个Object对象。在方法体通过proceed方法放行目标方法。

public class MyAspect {

	public void myBefore(JoinPoint jp){
		System.out.println("before:"+jp.getSignature().getName());
	}
	
	public void afterReturning(JoinPoint jp){
		System.out.println("afterReturning:"+jp.getSignature().getName());
	}
	
	public Object arount(ProceedingJoinPoint pjp) throws Throwable{
		System.out.println("around:1");
		Object obj = pjp.proceed();
		System.out.println("around:2");
		return obj;
	}
	
	public void afterThrowing(){
		System.out.println("afterThrowing");
	}
	
	public void after(JoinPoint jp){
		System.out.println("after");
	}
}

注解实现

<context:component-scan base-package="com.spring.test7_aopAspectJAnno"></context:component-scan>
   <!-- <context:annotation-config></context:annotation-config> -->
   <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

 

@Component
@Aspect
public class MyAspect {

	@Pointcut("execution(* com.spring.test7_aopAspectJAnno.UserService.*(..))")
	private void myPointCut(){
		
	}
	
//	@Before("execution(* com.spring.test7_aopAspectJAnno.UserService.*(..))")
	public void myBefore(JoinPoint jp){
		System.out.println("before:"+jp.getSignature().getName());
	}
	
	@AfterReturning(value="myPointCut()",returning="obj")
	public void afterReturning(JoinPoint jp,Object obj){
		System.out.println("afterReturning:"+jp.getSignature().getName());
	}
	
//	@Around("execution(* com.spring.test7_aopAspectJAnno.UserService.*(..))")
	public Object arount(ProceedingJoinPoint pjp) throws Throwable{
		System.out.println("around:1");
		Object obj = pjp.proceed();
		System.out.println("around:2");
		return obj;
	}
	
//	@AfterThrowing(value="execution(* com.spring.test7_aopAspectJAnno.UserService.*(..))",throwing="e")
	public void afterThrowing(JoinPoint jp,Throwable e){
		System.out.println("afterThrowing"+e.getMessage());
	}
	
//	@After("execution(* com.spring.test7_aopAspectJAnno.UserService.*(..))")
	public void after(JoinPoint jp){
		System.out.println("after");
	}
}