关于Aop切面中的@Before @Around等操作顺序的说明

Posted 2020-09-07 草帽boy

【转】http://www.cnblogs.com/softidea/p/6123307.html

话不多说，直接上代码：

package com.cdms.aop.aspectImpl;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.List;

/**
 * 创建 by 草帽boy on 2017/4/1.
 */
@Aspect
@Component
public class ICacheAopAction {
    @Pointcut("@annotation(com.cdms.aop.ICache)")
    private void controllerAspect(){}

    @Before("controllerAspect()")
    public void Before(JoinPoint joinPoint){
        String classname = joinPoint.getTarget().getClass().getSimpleName();
        String methodName = joinPoint.getSignature().getName();
        List<Object> args = Arrays.asList(joinPoint.getArgs());
        System.out.println("@before Execute! --class name: " + classname + ", method name: " + methodName + " " + args );
    }

    @Around("controllerAspect()")
    public Object Around(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        System.out.println("@Around：执行目标方法之前...");
        Object obj= proceedingJoinPoint.proceed();
        System.out.println("@Around：执行目标方法之后...");
        System.out.println("@Around：被织入的目标对象为：" + proceedingJoinPoint.getTarget());
        System.out.println( "@Around：原返回值：" + obj + "，这是返回结果的后缀");
        return obj;
    }

    @AfterThrowing("controllerAspect()")
    public void AfterThrowing(){
        System.out.println("异常通知....");
    }

    @After("controllerAspect()")
    public void After(JoinPoint point){
        System.out.println("@After：模拟释放资源...");
        System.out.println("@After：目标方法为：" +
                point.getSignature().getDeclaringTypeName() +
                "." + point.getSignature().getName());
        System.out.println("@After：参数为：" + Arrays.toString(point.getArgs()));
        System.out.println("@After：被织入的目标对象为：" + point.getTarget());
    }

    @AfterReturning("controllerAspect()")
    public void AfterReturning(JoinPoint point){
        System.out.println("@AfterReturning：模拟日志记录功能...");
        System.out.println("@AfterReturning：目标方法为：" +
                point.getSignature().getDeclaringTypeName() +
                "." + point.getSignature().getName());
        System.out.println("@AfterReturning：参数为：" +
                Arrays.toString(point.getArgs()));
        System.out.println("@AfterReturning：返回值为：" );
        System.out.println("@AfterReturning：被织入的目标对象为：" + point.getTarget());
    }

}

  测试的结果是：

这样就很清楚的看出各种方法是在什么时候调用的啦