day39-Spring 06-Spring的AOP：带有切点的切面

环绕增强功能是最强的,它相当于前置增强和后置增强.

这就是带有切点的切面

---

package cn.itcast.spring3.demo4;

import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;

//import org.springframework.cglib.proxy.MethodInterceptor;

/**
 * 增强的类:
 * 使用的是环绕增强
 * @author zhongzh
 *
 */
/**
 * 环绕增强功能是最强的,它相当于前置增强和后置增强.
 * @author zhongzh
 *
 */
public class MyAroundAdvice implements MethodInterceptor{

    public Object invoke(MethodInvocation methodInvocation) throws Throwable {
        // TODO Auto-generated method stub
        System.out.println("环绕前增强.....");
        Object result = methodInvocation.proceed();//放行,相当于执行你目标对象的方法. 执行目标对象的方法

        System.out.println("环绕后增强.....");

        return result;
    }

}

package cn.itcast.spring3.demo4;
/**
 * 目标对象
 * @author zhongzh
 *
 */
public class OrderDao {
    public void add(){
        System.out.println("添加订单");
    }
    public void update(){
        System.out.println("修改订单");
    }
    public void delete(){
        System.out.println("删除订单");
    }
    public void find(){
        System.out.println("查询订单");
    }
}

package cn.itcast.spring3.demo4;

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;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class SpringTest4 {
   @Autowired
   //@Qualifier("orderDao")
   @Qualifier("orderDaoProxy")
   private OrderDao orderDao;

   @Test
   public void demo1(){
       orderDao.add();
       orderDao.delete();
       orderDao.update();
       orderDao.find();
   }
}

<?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">
    <!-- 不带有切点的切面 -->

    <!-- 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>

  <!-- 带有切点的切面 -->
  <!-- 定义目标对象 -->

 <bean id="orderDao" class="cn.itcast.spring3.demo4.OrderDao"></bean>

  <!-- 定义增强 -->
   <bean id="aroundAdvice" class="cn.itcast.spring3.demo4.MyAroundAdvice"></bean>

   <!-- 定义切点切面: --><!-- 正则的方法切点切面 -->
   <bean id="mypointcutAdvisor" class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
   <!-- 要写一个正则规定它里面哪些方法吧 --><!--定义正则表达式,规定哪些方法执行拦截  -->
   <!-- .任意字符  *  任意个 -->
   <!--
   <property name="pattern" value=".*"></property>
   -->
   <!--
   <property name="pattern" value="cn\.itcast\.spring3\.demo4\.OrderDao\.add\.*"></property>
   -->
   <property name="patterns" value=".*add.*,.*find.*"></property>
   <!-- 应用增强 -->
   <property name="advice" ref="aroundAdvice"></property><!-- 把定义的增强应用上了 -->
   </bean>
   <!-- 定义生成代理对象 -->
   <bean id="orderDaoProxy"  class="org.springframework.aop.framework.ProxyFactoryBean">
            <!-- 配置目标 -->
        <property name="target" ref="orderDao"></property>
         <!-- 针对类的代理 -->
         <property name="proxyTargetClass" value="true"></property>
         <!-- 在目标上应用增强 -->
         <property name="interceptorNames" value="mypointcutAdvisor"></property>
   </bean>

</beans>