基于spring@aspect注解的aop实现过程代码实例

package com.dascom.hawk.app.web.tool;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class AnnotationAspectJ {

  //定义切面（"execution(* com.dascom.common.aop.*.*(..))）
  //当前配置的意思是所有添加了SuiteMessage的注解的方法作为切点
  @Pointcut("@annotation(com.dascom.common.annotation.SuiteMessage)")
  public void logPointCut() {
  }
  
  //前置通知
  @Before("logPointCut()")
  public void before(JoinPoint point) {
    String calssName = point.getTarget().getClass().getName();
    String method = point.getSignature().getName();
    System.out.println(calssName + " : " + method);
  }
  
  //后置通知
  @After("logPointCut()")
  public void after(JoinPoint point) {
    String method = point.getSignature().getName();
    System.out.println(method + ": end----");
  }
  
  //环绕通知
  @Around("logPointCut()")
  public Object around(ProceedingJoinPoint point) throws Throwable {
    long beginTime = System.currentTimeMillis();
    // 执行方法
    Object result = point.proceed();
    // 执行时长(毫秒)
    long time = System.currentTimeMillis() - beginTime;
    //异步保存日志
    System.out.println(time);
    return result;
  }
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:aop="http://www.springframework.org/schema/aop"
  xmlns:context="http://www.springframework.org/schema/context"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
  <!-- 配置自动扫描的包 -->
  <context:component-scan base-package="com.dascom.hawk.app.web.tool"></context:component-scan>
  <!-- 自动为切面方法中匹配的方法所在的类生成代理对象。
    proxy-target-class="true" 这个的作用是struts的控制类都基础的actionSupport，必须添加这个，不然会报错
   -->
  <aop:aspectj-autoproxy proxy-target-class="true" />
  
</beans>