AOP日志DEMO1：

实体类：

package com.etc.entity;

import org.aspectj.lang.annotation.Pointcut;

public class User implements IUser

{

	public static int NORMAL = 1;//普通用户角色

	public static int ADMIN = 2;    //管理员角色

	private int role;  //所属的角色

	public int getRole() {

		return role;

	}

	public void setRole(int role) {

		this.role = role;

	}

	public void login() {

		System.out.println("执行登录了！");

	}

	public void reg() {

		System.out.println("执行注册了！");

	//throw new RuntimeException("注册过程发生异常！");

	}

}

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实体类需实现的接口：

package com.etc.entity;

//定义用户接口

public interface IUser

{

	void login(); //登录

	void reg(); //注册

}

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通知类：

package com.etc.advice;

import org.aspectj.lang.ProceedingJoinPoint;

//自定义通知类

public class MyAdvice

{

	public  void beforelog()

	{

		System.out.println("这是前置通知的日志！");

	}

	public  void afterlog()

	{

		System.out.println("这是后置通知的日志！");

	}

	public  void aroundlog(ProceedingJoinPoint point) throws Throwable

	{

		System.out.println("这是环绕前通知的日志！");

		point.proceed();//原来代码的位置

		System.out.println("这是环绕后通知的日志！");

	}

	public void throwlog()

	{

		System.out.println("这是抛出异常后通知的日志");

	}

}

=================================================================

配置文件：

<?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:p="http://www.springframework.org/schema/p"

	xmlns:aop="http://www.springframework.org/schema/aop"

	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

	http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

  <!-- 定义1个业务类对象 -->

  <bean id="user" class="com.etc.entity.User">

    <property name="role" value="2"></property>

  </bean>

<!-- 定义1个通知类对象 -->

	<bean id="myadv" class="com.etc.advice.MyAdvice">

  	</bean>

  <aop:config>

   <!-- 配置切点的集合、即切线 -->

     <aop:pointcut expression="execution(* com.etc.entity.User.*(..))" id="mypc"/>

   <!-- 配置切入的方向 ，即切面-->

   	  <aop:aspect ref="myadv">

   	     <!-- 前置通知

   	  	<aop:before method="beforelog" pointcut-ref="mypc"/>

   	  	-->

   	  	 <!-- 后置通知

   	  	 <aop:after method="afterlog" pointcut-ref="mypc"/>

   	  	  -->

   	  	  <!-- 环绕通知

   	  	  <aop:around method="aroundlog" pointcut-ref="mypc"/>

   	  	  -->

   	  	   <!-- 异常通知

   	  	  <aop:after-throwing method="throwlog" pointcut-ref="mypc"/>

   	  	    -->

   	  </aop:aspect>

  </aop:config>

</beans>

===============================================

测试类：

package com.etc.test;

import org.springframework.beans.factory.BeanFactory;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.etc.entity.IUser;

public class Test {

	public static void main(String[] args)

	{

		BeanFactory fac = new ClassPathXmlApplicationContext("applicationContext.xml");

		IUser u = (IUser) fac.getBean("user");

		//执行业务方法

		u.login();

		System.out.println("=====");

		try

		{

			u.reg();

		} catch (Exception e)

		{

		}

	}

}

======================================================================