spring2.5 AOP学习

aop所需jar包

asm.jar 

asm-attrs.jar

asm-commons-2.2.3.jar

asm-util-2.2.3.jar

aspectjlib.jar

aspectjrt.jar

aspectjweaver.jar

Demo

                 ===============dao层=============

       

package org.dao.interfaces;

/**
 *@author:张 
 *2009-6-10 下午08:35:19
 */
public interface IUser {
  
 public void save(String userName);
}

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

package org.dao;

import org.dao.interfaces.IUser;
import org.springframework.stereotype.Repository;

/**
 *@author:张 
 *2009-6-10 下午08:38:12
 */
@Repository
public class UserImpl implements IUser {

 public void save(String userName) {
         System.out.println("用户"+userName+"保存成功！");
 }

}

==========================service层=============================

package org.dao;

import org.dao.interfaces.IUser;
import org.springframework.stereotype.Repository;

/**
 *@author:张奇峰
 *2009-6-10 下午08:38:12
 */
@Repository
public class UserImpl implements IUser {

 public void save(String userName) {
         System.out.println("用户"+userName+"保存成功！");
 }

}

==============切面================================

package org.aop;

import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

/**
 *@author:张奇峰
 *2009-6-24 下午08:36:46
 */

//设置为一个切面 
@Aspect
@Component
public class AopDemoClass {
   
 //切点表达式
 /**第一个* 表示切点返回值得类型 *表示任何类型
 * ..*表示拦截org.service包下的类及其子包下的类  如要拦截某类可直接.ClassName
 *后面的.*要拦截的方法  
 *(..)方法的参数 此表示任何参数
 */
 @Pointcut("execution(* org.service.UserService.*(..))")
 public void anyMethod()  //切点名称
 {}
 
 @Before("anyMethod()")
 public void beforeAdvice()
 {
  System.out.println("执行前置通知！");
 }
 
 @AfterReturning("anyMethod()")//名称也要加括号
 public void afterAdvice()
 {
  System.out.println("执行后置通知!");
 }

 @Around("anyMethod()")
 public Object doAction(ProceedingJoinPoint pjp)throws Throwable
 {   
  System.out.println("环绕执行开始");
  Object resultObject=pjp.proceed();//这个方法就是执行业务方法  一般都要执行这个方法
  System.out.println("环绕执行完毕");
  return resultObject;
 }
}

======================beans.xml===========================

<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:aop="http://www.springframework.org/schema/aop"
 xmlns:tx="http://www.springframework.org/schema/tx"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-2.5.xsd    
     http://www.springframework.org/schema/context    
     http://www.springframework.org/schema/context/spring-context-2.5.xsd
     http://www.springframework.org/schema/aop
     http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
    ">

     <context:component-scan base-package="org"/>
     <context:annotation-config/>
     <aop:aspectj-autoproxy/>

 </beans>

 ==========================TEST============================

package org.test;

import org.service.UserService;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 *@author:张奇峰
 *2009-6-24 下午08:41:43
 */

public class AopTestClass {

 @org.junit.Test
 public void Test()
 {
  AbstractApplicationContext context=new ClassPathXmlApplicationContext("bean.xml");
  UserService service=(UserService)context.getBean("userService");
  service.save("zhanqsan");
   context.close();
 }
}

输出：

 执行前置通知！
环绕执行开始
用户zhanqsan保存成功！
执行后置通知!
环绕执行完毕