spring AOP學習總結

spring的AOP是基於接口的動態代理.

1. 定義接口類 Performer

package com.chapter4.inter; public interface Performer { void perform(); }

 

2. 定義目標對象 Jack implements Performer和Duke implements Performer

package com.chapter4.impl; import com.chapter4.inter.Performer; public class Jack implements Performer { public void perform() { System.out.println("I'am Jack,I am going to sing a song for all of you!"); } }

package com.chapter4.impl; import com.chapter4.inter.Performer; public class Duke implements Performer { public void perform() { System.out.println("I'am Duke,I am going to sing a song for all of you!"); } }

3. 定義切面類 Audience

package com.chapter4.aop; public class Audience { public void takeSeats() { System.out.println("audience take seats"); } public void turnOffCellPhones() { System.out.println("audience turn off Cell Phones"); } public void applaud() { System.out.println("sing good!"); } public void demandRefund() { System.out.println("Boo,We want our money back!"); } }

4. 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: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-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"> <bean id="duke" class="com.chapter4.impl.Duke" /> <bean id="jack" class="com.chapter4.impl.Jack" /> <bean id="audience" class="com.chapter4.aop.Audience" /> <aop:config> <aop:aspect ref="audience"><!-- 定義切面 --> <aop:pointcut id="pointCut" expression="execution(* *.perform(..))" /><!-- 定義切點 --> <aop:before method="takeSeats" pointcut-ref="pointCut"/><!-- 定義Advice --> <aop:before method="turnOffCellPhones" pointcut-ref="pointCut"/> <aop:after-returning method="applaud" pointcut-ref="pointCut"/> <aop:after-throwing method="demandRefund" pointcut-ref="pointCut"/> </aop:aspect> </aop:config> </beans>   

 

 

5. 測試

 package com.chapter4.impl; import org.springframework.beans.factory.BeanFactory; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.chapter4.inter.Performer; public class Test { public static void main(String[] args) throws Exception { BeanFactory factory = new ClassPathXmlApplicationContext("springchapter4.xml"); Performer performer = (Performer) factory.getBean("duke"); performer.perform(); System.out.println("-------------------------------------------------"); Performer performer2 = (Performer) factory.getBean("jack"); performer2.perform(); } }