1、后置通知
需求:调用相应业务方法后,完成资源的关闭。
a、 在beans.xml中配置
1 .... 2 3 <beans> 4 5 <!--配置被代理对象--> 6 <bean id="test1Service" class="com.huawei.aop.Test1Service"> 7 <property name="name" value="spring"/> 8 </bean> 9 10 <!--配置后置通知--> 11 <bean id="myAfterServiceAdvice" class="com.huawei.aop.MyAfterServiceAdvice"/> 12 13 <!--配置代理对象--> 14 <bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"> 15 16 <!--配置代理接口集--> 17 <property name="proxyInterfaces"> 18 <list> 19 <value>com.huawei.aop.Test1ServiceInter</value> 20 <value>com.huawei.aop.Test2ServiceInter</value> 21 </list> 22 </property > 23 24 <!--将通知织入代理--> 25 <property name="interceptorNames"> 26 <list> 27 <value>myAfterServiceAdvice</value> 28 </list> 29 </property> 30 31 <!--配置被代理对象--> 32 <property rel="target" name="test1Service"/> 33 </bean> 34 </beans>
b、实现 AfterReturningAdvice 接口
1 package com.huawei.aop; 2 3 import java.lang.reflect.Method; 4 5 import org.springframework.aop.AfterReturningAdvice; 6 7 public class MyAfterServiceAdvice implements AfterReturningAdvice 8 { 9 10 @Override 11 public void afterReturning(Object arg0, Method arg1, Object[] arg2, 12 Object arg3) throws Throwable 13 { 14 15 System.out.println("关闭资源"); 16 } 17 18 }
3.测试类
1 package com.huawei.aop; 2 3 import org.springframework.context.ApplicationContext; 4 import org.springframework.context.support.ClassPathXmlApplicationContext; 5 6 public class AopTest { 7 8 /** 9 * aop 编程测试类 10 */ 11 public static void main(String[] args) 12 { 13 //获取应用上下文对象 14 ApplicationContext ac = new ClassPathXmlApplicationContext("com/huawei/aop/beans.xml"); 15 16 //获取实例对象 17 Test1ServiceInter ti = (Test1ServiceInter) ac.getBean("proxyFactoryBean"); 18 19 //调用实例方法 20 ti.sayHello(); 21 22 ((Test2ServiceInter) ti).sayBye(); 23 } 24 25 }