package concert;
public interface Performance{
  public void perform();
}

package concert;

@Aspect//表示Audience的实例是一个切面
public class Audience{
  @Before("execution(**concert.Performance.perform(..))")
  public void silenceCellPhones(){
  //在perfrom方法执行之前
  }
  @Before("execution(**concert.Performance.perform(..))")
  public void takeSeats(){
  //在perfrom方法执行之前
  }
  @AfterReturning("execution(**concert.Performance.perform(..))")
  public void silenceCellPhones(){
  //在perfrom方法执行之后
  }
  @AfterThrowing("execution(**concert.Performance.perform(..))")
  public void silenceCellPhones(){
  //在perfrom方法抛出异常之后
  }
}

@Aspect//表示Audience的实例是一个切面
public class Audience{
  @Pointcut("execution(**concert.Performance.perform(..))")
  public void performance(){}
  @Before("performance()")
  public void silenceCellPhones(){
  //在perfrom方法执行之前
  }
  @Before("performance()")
  public void takeSeats(){
  //在perfrom方法执行之前
  }
  @AfterReturning("performance()")
  public void silenceCellPhones(){
  //在perfrom方法执行之后
  }
  @AfterThrowing("performance()")
  public void silenceCellPhones(){
  //在perfrom方法抛出异常之后
  }
}

@Configuration
@EnableAspectJAutoProxy//启动AspectJ自动代理
@ComponentScan
public class ConcertConfig{
}
//或者在配置文件中配置中添加
<aop:aspectj-autoproxy />

@Aspect//表示Audience的实例是一个切面
public class Audience{
  @Pointcut("execution(**concert.Performance.perform(..))")
  public void performance(){}
  
  @Before("performance()")
  public void watchPerformance(ProceedingJoinPoint jp){
    //在方法之前执行
    System.out.println(" beform the method is invoked");
    jp.proceed()//控制权交给目标方法
    //在方法之后执行
    System.out.println(" after the method is invoked");
  }
  
}

public class Audience{
  @Pointcut("execution(**concert.Performance.perform(int))&&args(trackNumber)")
  public void performance(){}
  
  @Before("performance(trackNumber)")
  public void watchPerformance(int trackNumber){
    //截获传递给目标方法的参数并传递给切面中处理方法
    System.out.println(trackNumber);
  }
  
}

<aop:config>
  <aop:aspect ref="audience">
    <aop:before
     pointcut="execution(**concert.Performance.perform())" method="silenceCellPhones"/>
     <aop:before
     pointcut="execution(**concert.Performance.perform())" method="takeSeats"/>
     <aop:after-returning
     pointcut="execution(**concert.Performance.perform())" method="applause"/>
     <aop:after-throwing
     pointcut="execution(**concert.Performance.perform())" method="demandRefund"/>

  </aop:aspect>
</aop config>

<aop:config>
  <aop:aspect ref="audience">
    <aop:pointcut id="performance" expression="execution(**concert.Performance.perform())">
    <aop:before
     pointcut-ref="performance" method="silenceCellPhones"/>
     <aop:before
     pointcut="performance" method="takeSeats"/>
     <aop:after-returning
     pointcut="performance" method="applause"/>
     <aop:after-throwing
     pointcut="performance" method="demandRefund"/>

  </aop:aspect>
</aop config>