基于Annotation的Spring AOP: @AfterReturning

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AfterReturning 增强处理将在目标方法正常完成后被织入。

使用@AfterReturning可指定如下两个属性：

① pointcut / value : 两者都用于指定该切入点对应的切入表达式

② returning : 指定一个返回值形参名，增强处理定义的方法可通过该行参名来访问目标方法的返回值。

Person.java :

public interface Person {public String sayHello(String name);public void eat(String food);}

Chinese.java :

import org.springframework.stereotype.Component;@Componentpublic class Chinese implements Person {@Overridepublic void eat(String food) {System.out.println("我正在吃:"+food);}@Overridepublic String sayHello(String name) {System.out.println("sayHello方法被执行了");return name+"Hello,Spring AOP";}}

AfterReturningAdviceTest.java :

import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.Aspect;/** * 定义一个切面 * @author Administrator * */@Aspectpublic class AfterReturningAdviceTest {@AfterReturning(returning="rvt",pointcut="execution(* com.bean.*.*(..))")public void log(Object rvt){System.out.println("获取目标方法返回值："+rvt);System.out.println("模拟记录日志的功能...");}}

bean.xml :

<?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"        xmlns:tx="http://www.springframework.org/schema/tx"        xsi:schemaLocation="http://www.springframework.org/schema/beans                 http://www.springframework.org/schema/beans/spring-beans-2.5.xsd                http://www.springframework.org/schema/context                 http://www.springframework.org/schema/context/spring-context-2.5.xsd                http://www.springframework.org/schema/tx                http://www.springframework.org/schema/tx/spring-tx-2.5.xsd                http://www.springframework.org/schema/aop                http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">            <context:component-scan base-package="com.bean">        <context:include-filter type="annotation"                  expression="org.aspectj.lang.annotation.Aspect"/>    </context:component-scan>       <aop:aspectj-autoproxy/>     </beans>

Test.java :

public class Test {public static void main(String[] args) {ApplicationContext ctx=new ClassPathXmlApplicationContext("bean.xml");Person p=(Person) ctx.getBean("chinese");System.out.println(p.sayHello("张三"));p.eat("西瓜");}}

运行控制台输出：