package com.spring;

 import java.text.SimpleDateFormat;

 import java.util.Date;

 public class Performer {

     private Instrument ins;

     public Performer(Instrument ins){

         this.ins=ins;            //与Violin紧密耦合

     }

     public void play(){

         ins.play();

     }

 }

 class Record{

     private SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

     public void starttime(){

         System.out.println(df.format(new Date()));

     }

     public void endtime(){

         System.out.println(df.format(new Date()));

     }

 }

 class Violin extends Instrument {

     public void play() {

         System.out.println("Violin music!");

     }

 }

 class Instrument {

     void play(){};

 }

package com.spring;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class PerformerMain {

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        ApplicationContext apc = new ClassPathXmlApplicationContext("spring.xml");

        Performer hello = (Performer) apc.getBean("performer");

        hello.play();

    }

}

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

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

    xmlns:aop="http://www.springframework.org/schema/aop" 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-3.0.xsd

                           http://www.springframework.org/schema/aop

                           http://www.springframework.org/schema/aop/spring-aop.xsd">

    <bean id="performer" class="com.spring.Performer">

        <constructor-arg ref="violin" />

    </bean>

    <bean id="violin" class="com.spring.Violin"></bean>

    <bean id="record" class="com.spring.Record"></bean>

    <aop:config>

        <aop:aspect ref="record">

            <aop:pointcut expression="execution(* com.spring.Performer.play(..))"  id="play"/>

            <aop:before method="starttime" pointcut-ref="play"/>

            <aop:after method="endtime" pointcut-ref="play"/>

        </aop:aspect>

    </aop:config>

</beans>