Spring 开发第一步（二）

<aop:aspect ref="audience">
        <aop:pointcut id="performance" expression="execution(* com.springinaction.springidol.Performer.perform(..))" />
        <aop:before pointcut-ref="performance" method="takeSeats"/>
        <aop:before pointcut-ref="performance" method="turnOffCellphone"/>
        <aop:after-returning pointcut-ref="performance" method="applaud"/>
        <aop:after-throwing pointcut-ref="performance" method="demandRefund"/>
    </aop:aspect>

package com.springinaction.springidol;

public class Audience {
    public void takeSeats(){
        System.out.println("The audience is taking their seats.");
    }
    public void turnOffCellphone(){
        System.out.println("The audience is turning off their cellphones.");
    }
    public void applaud(){
        System.out.println("CLAP CLAP CLAP CLAP.");
    }
    public void demandRefund(){
        System.out.println("Boo! We want out money back!");
    }
}