spring 中的<aop:advisor>和<aop:aspect>有什么区别？

时间：2016-06-02 11:40:28 阅读：135 评论：0 收藏：0 [点我收藏+]

标签：spring

在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">

<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>

java中例子1

@Test

public void testSchemaBeforeAdvice() {

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

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

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

helloworldService.sayBefore("before");

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

}

例子2

@Test

public void testSchemaAdvisor() {

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

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

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

helloworldService.sayAdvisorBefore("haha");

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

}

这里说明一下

所以“<aop:aspect>”实际上是定义横切逻辑，就是在连接点上做什么，“<aop:advisor>”则定义了在哪些连接点应用什么<aop:aspect>。Spring这样做的好处就是可以让多个横切逻辑（即<aop:aspect>定义的）多次使用，提供可重用性。