AspectJ的五大通知核心配置和註解實現

配置實現 

<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"/> -->
   		<!-- 後置通知 -->
   		<!-- <aop:after-returning method="afterReturning" pointcut="execution(* com.spring.test6_aopAspectJ.UserServiceImpl.*(..))"/> -->
   		<!-- 環繞通知 -->
   		<!-- <aop:around method="arount" pointcut-ref="myPointCut" arg-names="pjp"/> -->
   		<!-- 異常通知 -->
   		<!-- <aop:after-throwing method="afterThrowing" pointcut-ref="myPointCut"/> -->
   		<!-- 最終通知 -->
   		<aop:after method="after" pointcut-ref="myPointCut"/>
   	</aop:aspect>
   </aop:config>

 在環繞通知方法的中必須要傳入參數，而且這個參數必須是org.aspectj.lang.JoinPoint的實現類ProceedingJoinPoint,並且參數如果不是myJoinPoint的情況下，在xml配置環繞通知時，需要知道參數名arg-names="參數名"，並且環繞通知方法必須返回一個Object對象。在方法體通過proceed方法放行目標方法。

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");
	}
}

註解實現

<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");
	}
}