aop-后置通知

1、Class MyAfterRetuningAdvice

package com.aop02;

import java.lang.reflect.Method;

import org.springframework.aop.AfterReturningAdvice;
//后置通知:可以获取目标方法的返回结果，但无法改变目标方法的结果
public class MyAfterReturningAdvice implements AfterReturningAdvice {

//在目标方法执行之后执行
//returnValue:目标方法的返回值
@Override
public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable {
	System.out.println("执行后置通知方法 returnValue = " + returnValue);
	String resultString;
	if (returnValue != null) {
		resultString = ((String) returnValue).toUpperCase();
		System.out.println("修改之后的返回值returnValue = " + resultString);
	}
}

}

2、Class MyTest

package com.aop02;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest {

public static void main(String[] args) {
	
	String resource = "com/aop02/applicationContext.xml";
	ApplicationContext ac = new ClassPathXmlApplicationContext(resource);
	
	ISomeService service = (ISomeService) ac.getBean("serviceProxy");
	service.doFirst();
	System.out.println("------------------------------------");
	String result = service.doSecond();
	System.out.println(result);
}

}

3、applicationContext.xml

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

<!-- 注册目标对象 -->
<bean id="someService" class="com.aop02.SomeServiceImpl"/>
<!-- 注册切面 -->
<bean id="myAdvice" class="com.aop02.MyAfterReturningAdvice"/>
<!-- 生成代理对象 -->
<bean id="serviceProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
	<!-- 指定目标对象 -->
	<property name="target" ref="someService"/>
	<!-- 指定切面 -->
	<property name="interceptorNames" value="myAdvice"/>
</bean>