<!-- 手动生成代理太麻烦了.Spring支持配置生成代理: -->

  <!-- 代理对象 -->

  <bean id="customerDaoProxy" class="org.springframework.aop.framework.ProxyFactoryBean">

      <!-- 设置目标对象 -->

      <property name="target" ref="customerDao"></property>

      <!-- 设置实现的接口,value中写接口的全路径 -->

      <!-- 类实现的接口的全路径 -->

      <property name="proxyInterfaces" value="cn.itcast.spring3.demo3.CustomerDao"></property>

      <!-- 需要使用value:要的名称 使用beforeAdvice对它进行增强 -->

      <property name="interceptorNames" value="beforeAdvice"></property><!--interceptorNames要拦截的名称  -->

      <!-- 这个是针对类的所有方法进行拦截的,你还没到配置方法的那一步呢 -->

  </bean>

<?xml version="1.0" encoding="UTF-8"?>

<!-- 引入beans的头 -->

<beans xmlns="http://www.springframework.org/schema/beans"

       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.xsd">

    <!-- 定义目标对象 -->

     <bean id="customerDao" class="cn.itcast.spring3.demo3.CustomerDaoImpl">

  </bean>

<!-- 定义增强  增强对象-->

  <bean id="beforeAdvice" class="cn.itcast.spring3.demo3.MyBeforeAdvice">

  </bean>

  <!-- 手动生成代理太麻烦了.Spring支持配置生成代理: -->

  <!-- 代理对象 -->

  <bean id="customerDaoProxy" class="org.springframework.aop.framework.ProxyFactoryBean">

      <!-- 设置目标对象 -->

      <property name="target" ref="customerDao"></property>

      <!-- 设置实现的接口,value中写接口的全路径 -->

      <!-- 类实现的接口的全路径 -->

      <property name="proxyInterfaces" value="cn.itcast.spring3.demo3.CustomerDao"></property>

      <!-- 需要使用value:要的名称 使用beforeAdvice对它进行增强 -->

      <property name="interceptorNames" value="beforeAdvice"></property><!--interceptorNames要拦截的名称  -->

      <!-- 这个是针对类的所有方法进行拦截的,你还没到配置方法的那一步呢 -->

  </bean>

</beans>

package cn.itcast.spring3.demo3;

public interface CustomerDao {

public void add();

public void delete();

public void update();

public void find();

}

package cn.itcast.spring3.demo3;

public class CustomerDaoImpl implements CustomerDao {

    public void add() {

        // TODO Auto-generated method stub

        System.out.println("添加客户");

    }

    public void delete() {

        // TODO Auto-generated method stub

        System.out.println("删除客户");

    }

    public void update() {

        // TODO Auto-generated method stub

        System.out.println("修改客户");

    }

    public void find() {

        // TODO Auto-generated method stub

        System.out.println("查询客户");

    }

}

package cn.itcast.spring3.demo3;

import java.lang.reflect.Method;

import org.springframework.aop.MethodBeforeAdvice;

/**

 * 前置增强

 * @author zhongzh

 *

 */

public class MyBeforeAdvice implements MethodBeforeAdvice{

    /*

     * method:执行的方法

     * args:参数

     * target:目标对象

     * 要对目标对象的某一方法增强

     * (non-Javadoc)

     * @see org.springframework.aop.MethodBeforeAdvice#before(java.lang.reflect.Method, java.lang.Object[], java.lang.Object)

     */

    public void before(Method method, Object[] args, Object target)

            throws Throwable {

        // TODO Auto-generated method stub

        System.out.println("前置增强.....");

    }

}

package cn.itcast.spring3.demo3;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Qualifier;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@ContextConfiguration("classpath:applicationContext.xml")

@RunWith(SpringJUnit4ClassRunner.class)

public class SpringTest3 {

    @Autowired

    //@Qualifier("customerDao")//和applicationContext.xml中配置的id=customerDao对应 注入的是真实的对象,必须注入代理对象.

    @Qualifier("customerDaoProxy")

    private CustomerDao customerDao;

    @Test

    public void demo1(){

        customerDao.add();

        customerDao.delete();

        customerDao.update();

        customerDao.find();

    }

}