JAVA自定义AOP编程_java怎么写aop

JAVA 自定义AOP编程

package com.king.aspect;

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

import java.util.HashMap;
import java.util.Map;

/**
 * Created by Administrator on 2017/9/6.
 */
@Aspect
@Component
public class LogAspect {
    /**
     * 切点
     */
    @Pointcut("execution(* com.king.controller.*.*(..))")
    public static void poingCat(){}

    @After(value = "poingCat()")
    public void after(JoinPoint joinPoint){
        System.out.println("==============后置通知start===============");
    }

    @Before(value = "poingCat()")
    public void before(JoinPoint joinPoint){
        System.out.println("==============前置通知start===============");
    }

    @AfterThrowing(value = "poingCat()")
    public void afterThrowing(JoinPoint joinPoint){
        System.out.println("===============方法抛出异常执行=============");
    }

    @AfterReturning(value = "poingCat()",returning="result")
    public void afterReturning(JoinPoint joinPoint,Object result){
        System.out.println("===============方法返回正常执行=============");
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("code","SUCCESS");
        map.put("msg","成功");
        map.put("data",result);
    }

    //@Around(value = "poingCat()")
    public Object around(ProceedingJoinPoint joinPoint)throws Throwable{
        System.out.println("================环绕通知start==================");
        Object retVal = null;
        String method = joinPoint.getSignature().getName();
        System.out.println("请求方法=="+method+"==");
        Object[] args = joinPoint.getArgs();
        for (Object o:args){
            System.out.println("环绕请求参数=="+o+"==");
        }
        Object obj = joinPoint.proceed();
        Map<String, Object> map = null;
        if(obj instanceof java.util.Map){
            System.out.println("返回类型为Map");
            //接口返回的数据
            map = (Map)obj;
            map.put("code","SUCCESS");
            map.put("msg","成功");
            System.out.println("环绕通知返回=="+map+"==");
        } else if(obj instanceof java.util.List){
            System.out.println("返回类型为List");
        }
        return map;
    }
}

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