快捷導(dǎo)航

詳解Spring 基于 Aspect 注解的增強(qiáng)實現(xiàn)

更新時間：2017年04月27日 08:43:16 作者：多多2017

本篇文章主要介紹了詳解Spring 基于 Aspect 注解的增強(qiáng)實現(xiàn)，非常具有實用價值，需要的朋友可以參考下

整理文檔，搜刮出一個Spring 基于 Aspect 注解的增強(qiáng)實現(xiàn)的代碼，稍微整理精簡一下做下分享

定義基本實體類

package com.advice;

/**
 * @author Duoduo
 * @version 1.0
 * @date 2017/4/25 23:41
 */
public class Performer {

  public void doPerform() {
    System.out.println("Performer do perform ....................... ");
  }
}

定義基于注解的增強(qiáng)類

package com.advice;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;

/**
 * @author Duoduo
 * @version 1.0
 * @date 2017/4/25 23:42
 */

@Aspect//定義切面
public class Audience {

  //定義切點(diǎn)
  @Pointcut("execution(* com.advice.Performer.doPerform(..))")
  public void doPerform(){}

  @Before("doPerform()")
  public void takeSeas() {
    System.out.println("The audience is taking their seats.");
  }

  @Before("doPerform()")
  public void turnOffPhone() {
    System.out.println("The audience is turn off their cellphone.");
  }

  @AfterReturning("doPerform()")
  public void applaund() {
    System.out.println("CLAP CLAP CLAP CLAP ...");
  }

  @AfterThrowing("doPerform()")
  public void demandRefund() {
    System.out.println("Boo! we want our money back!");
  }

  @Around("doPerform()")
  public void watchPerfomance(ProceedingJoinPoint joinPoint) {

    try {
      Long start = System.currentTimeMillis();

      joinPoint.proceed();

      long end = System.currentTimeMillis();

      System.out.println("The performance took "+(end-start)+" milliseconds");

    } catch (Throwable throwable) {
      throwable.printStackTrace();
    }


  }
}

Spring 自動代理配置

<!-- aop 增強(qiáng)自動代理 -->
<aop:aspectj-autoproxy/>
<bean id="audience" class="com.advice.Audience"/>
<bean id="performer" class="com.advice.Performer"/>

Junit測試

@Test
  public void testDoPerform() throws Exception {
    ApplicationContext context = new ClassPathXmlApplicationContext("classpath:smart-context.xml");
    //代理為指向Interface的代理
    Performer performer = (Performer) context.getBean("performer");

    System.out.println("+++++++++++++++++++++++++++++++++");
    performer.doPerform();
  }

測試結(jié)果

+++++++++++++++++++++++++++++++++
2017-04-26 20:51:16,980 DEBUG [main] (AbstractBeanFactory.java:251) - Returning cached instance of singleton bean 'audience'
The audience is taking their seats.
The audience is turn off their cellphone.
Performer do perform ....................... 
The performance took 91 milliseconds
CLAP CLAP CLAP CLAP ...

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

您可能感興趣的文章: