Spring面向切面编程(AOP)方式二

使用注解进行实现：减少xml文件的配置。

1 建立切面类

不需要实现任何特定接口，按照需要自己定义通知。

 package org.guangsoft.utils;
 import java.util.Date;
 import org.aspectj.lang.ProceedingJoinPoint;
 import org.aspectj.lang.annotation.AfterReturning;
 import org.aspectj.lang.annotation.AfterThrowing;
 import org.aspectj.lang.annotation.Around;
 import org.aspectj.lang.annotation.Aspect;
 import org.aspectj.lang.annotation.Before;
 import org.springframework.stereotype.Component;
 /***
  * 定义用户的切面类
  * ***/
 @Component
 @Aspect
 public class UsersAdvice
 {
     // 前置的通知
     @Before("execution(* com.bjsxt.service.impl.*.*(..))")
     public void before()
     {
         System.out.println("before-------------" + new Date());
     }
     // 后置通知
     // @After("execution(* com.bjsxt.service.impl.*.*(..))")
     @AfterReturning(pointcut = "execution(* com.bjsxt.service.impl.*.*(..))", returning = "rv")
     public void after(Object rv)
     {
         System.out.println("after-------------" + new Date() + "--------------"
                 + rv);
     }
     /****
      * 环绕通知
      * **/
     @Around("execution(* com.bjsxt.service.impl.*.*(..))")
     public void around(ProceedingJoinPoint jp)
     {
         System.out.println("aroun.---------before-------------" + new Date());
         try
         {
             jp.proceed();// 调用目标方法
         }
         catch (Throwable e)
         {
             e.printStackTrace();
         } // 调用目标方法
         System.out.println("around---------after--------------" + new Date());
     }
     /***
      * 异常通知
      * **/
     @AfterThrowing(pointcut = "execution(* com.bjsxt.service.impl.*.*(..))", throwing = "ex")
     public void exception(Throwable ex)
     {
         System.out.println("exception-------------------" + ex.getMessage());
     }
 }

2xml文件配置

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- 到入xml文件的约束 -->
 <beans
     xmlns="http://www.springframework.org/schema/beans"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:aop="http://www.springframework.org/schema/aop"
     xmlns:p="http://www.springframework.org/schema/p"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-4.1.xsd
      ">
     <!-- 开启扫描注解 -->
     <context:component-scan
         base-package="org.guangsoft.service.impl,org.guangsoft.utils">
     </context:component-scan>
     <!-- 开启切面的自动代理 -->
     <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
 </beans>

在开发中是方式二。减少xml配置，实现灵活