Spring4 In Action-4.2-@AspectJ-切面

源码下载地址：http://download.csdn.net/download/poiuy1991719/9993015

Spring4 In Action-4.2-@AspectJ-切面

bean接口：

package com.zte.sound.service.bean;
/**
 * 光盘 
 */
public interface CompactDisc {
    public void play();
}

Bean接口实现类：

package com.zte.sound.service.bean.imp;

import org.springframework.stereotype.Component;

import com.zte.sound.service.bean.CompactDisc;

//@Component注解会告诉Spring创建这个类的实例bean（注意，启动Component注解功能需要在xml里面配置）
//@Component("newName")//这里，配置类已经创建了
public class SgtPeppers implements CompactDisc {

    private String title;
    private String artist;
    
    public SgtPeppers(String title,String artist){
        this.title=title;
        this.artist=artist;
        System.out.println("SgtPeppers类实例化");
    }
    
    public void play() {
        System.out.println("Sgt Playing:title="+title+" artist="+artist);
    }

}

切面类：

package com.zte.sound.service.bean;

import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class Audience {
    
    //这样就可以在后面调用简化（例如：takeSet()方法）
    @Pointcut("execution(** com.zte.sound.service.bean.CompactDisc.play(..))")
    public void perfomanceRef(){}

    //表演前
    @Before("execution(** com.zte.sound.service.bean.CompactDisc.play(..))")
    public void silenceCellPhones(){
        System.out.println("silenceCellPhones：@Before:0：请把手机静音");
    }
    
    @Before("perfomanceRef()")
    public void takeSet(){
        System.out.println("takeSet：@Before:1：找一个位置坐下");
    }

    //表演后
    @AfterReturning("execution(** com.zte.sound.service.bean.CompactDisc.play(..))")
    public void applause(){
        System.out.println("applause：@AfterReturning：鼓掌");
    }
    
    @AfterThrowing("execution(** com.zte.sound.service.bean.CompactDisc.play(..))")
    public void demandRefund(){
        System.out.println("demandRefund：@AfterThrowing：唱错了重唱");
    }
}

配置类：

package configs;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.context.annotation.Import;

import com.zte.sound.service.bean.Audience;
import com.zte.sound.service.bean.CompactDisc;
import com.zte.sound.service.bean.imp.SgtPeppers;

@Configuration
@ComponentScan(basePackageClasses={SgtPeppers.class,Audience.class})
@EnableAspectJAutoProxy   //启动AspectJ自动代理
public class CDPlayerConfig {

    @Bean
    public CompactDisc returnSgtPeppers(){//播放SgtPeppers
        return new SgtPeppers("title","artist");
    }
    
    //申明切入点Audience对象
    @Bean
    public Audience audience(){
        return new Audience();
    }
    
}

测试类：

package test;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.zte.sound.service.bean.CompactDisc;
import org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator;
import configs.CDPlayerConfig;

@RunWith(SpringJUnit4ClassRunner.class)//Spring的Junit测试，会在测试开始时，创建Spring的应用上下文
@ContextConfiguration(classes=CDPlayerConfig.class)//表明配置类
public class SpringTest1 {

    //自动装配
    @Autowired
    private CompactDisc sp;
    
    @Test 
    public void instanceSpring(){
        //自动装配
        sp.play();
    }
}