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详解Spring 基于 Aspect 注解的增强实现

2024-02-24 22:43:04 56

整理文档，搜刮出一个Spring基于Aspect注解的增强实现的代码，稍微整理精简一下做下分享

定义基本实体类

packagecom.advice;

/**
*@authorDuoduo
*@version1.0
*@date2017/4/2523:41
*/
publicclassPerformer{

publicvoiddoPerform(){
System.out.println("Performerdoperform.......................");
}
}

定义基于注解的增强类

packagecom.advice;

importorg.aspectj.lang.ProceedingJoinPoint;
importorg.aspectj.lang.annotation.*;

/**
*@authorDuoduo
*@version1.0
*@date2017/4/2523:42
*/

@Aspect//定义切面
publicclassAudience{

//定义切点
@Pointcut("execution(*com.advice.Performer.doPerform(..))")
publicvoiddoPerform(){}

@Before("doPerform()")
publicvoidtakeSeas(){
System.out.println("Theaudienceistakingtheirseats.");
}

@Before("doPerform()")
publicvoidturnOffPhone(){
System.out.println("Theaudienceisturnofftheircellphone.");
}

@AfterReturning("doPerform()")
publicvoidapplaund(){
System.out.println("CLAPCLAPCLAPCLAP...");
}

@AfterThrowing("doPerform()")
publicvoiddemandRefund(){
System.out.println("Boo!wewantourmoneyback!");
}

@Around("doPerform()")
publicvoidwatchPerfomance(ProceedingJoinPointjoinPoint){

try{
Longstart=System.currentTimeMillis();

joinPoint.proceed();

longend=System.currentTimeMillis();

System.out.println("Theperformancetook"+(end-start)+"milliseconds");

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


}
}

Spring自动代理配置

Junit测试

@Test
publicvoidtestDoPerform()throwsException{
ApplicationContextcontext=newClassPathXmlApplicationContext("classpath:smart-context.xml");
//代理为指向Interface的代理
Performerperformer=(Performer)context.getBean("performer");

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

测试结果

+++++++++++++++++++++++++++++++++
2017-04-2620:51:16,980DEBUG[main](AbstractBeanFactory.java:251)-Returningcachedinstanceofsingletonbean'audience'
Theaudienceistakingtheirseats.
Theaudienceisturnofftheircellphone.
Performerdoperform.......................
Theperformancetook91milliseconds
CLAPCLAPCLAPCLAP...

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详解Spring 基于 Aspect 注解的增强实现

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