aop 環繞通知 可以計算機 程式執行的時間

1、java代碼

   @Test

    public void testSchemaAroundAdvice() {

        System.out.println("======================================");

        long start = System.currentTimeMillis();

        ApplicationContext ctx = new ClassPathXmlApplicationContext("chapter6/advice.xml");

        IHelloWorldService helloworldService = ctx.getBean("helloWorldService", IHelloWorldService.class);

        helloworldService.sayAround("haha");

        long end = System.currentTimeMillis();

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

    }

2、advice.xml中

<?xml version="1.0" encoding="UTF-8"?>

<beans  xmlns="http://www.springframework.org/schema/beans"

        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

        xmlns:context="http://www.springframework.org/schema/context"

        xmlns:aop="http://www.springframework.org/schema/aop"

        xsi:schemaLocation="

           http://www.springframework.org/schema/beans

           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

           http://www.springframework.org/schema/context

           http://www.springframework.org/schema/context/spring-context-3.0.xsd

           http://www.springframework.org/schema/aop

           http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

   <bean id="helloWorldService" class="cn.javass.spring.chapter6.service.impl.HelloWorldService"/>

   <bean id="aspect" class="cn.javass.spring.chapter6.aop.HelloWorldAspect"/>

   <bean id="beforeAdvice" class="cn.javass.spring.chapter6.aop.BeforeAdviceImpl"/>

    <aop:config>

         <aop:advisor pointcut="execution(* cn.javass..*.sayAdvisorBefore(..))"

                     advice-ref="beforeAdvice"/> 

        <aop:aspect ref="aspect">

             <aop:before pointcut="execution(* cn.javass..*.sayBefore(..)) and args(param)" 

                         method="beforeAdvice(java.lang.String)" 

                         arg-names="param"/>

             <aop:after-returning pointcut="execution(* cn.javass..*.sayAfterReturning(..))" 

                                  method="afterReturningAdvice" 

                                  arg-names="retVal"

                                  returning="retVal"/>

             <aop:after-throwing pointcut="execution(* cn.javass..*.sayAfterThrowing(..))" 

                                  method="afterThrowingAdvice" 

                                  arg-names="exception"

                                  throwing="exception"/>

             <aop:after pointcut="execution(* cn.javass..*.sayAfterFinally(..))" 

                       method="afterFinallyAdvice"/>

             <aop:around pointcut="execution(* cn.javass..*.sayAround(..))" 

                         method="aroundAdvice"/>

            <aop:declare-parents types-matching="cn.javass..*.IHelloWorldService+" 

                                 implement-interface="cn.javass.spring.chapter6.service.IIntroductionService"

                                 default-impl="cn.javass.spring.chapter6.service.impl.IntroductiondService"/>

        </aop:aspect>

    </aop:config>

</beans>

3、切面中的 方法 

   public Object aroundAdvice(ProceedingJoinPoint pjp) throws Throwable {

        System.out.println("===========around before advice");

        Object retVal = pjp.proceed(new Object[] {"replace"});

        System.out.println("===========around after advice");