AOP快速入门案例（三）

一 通知类型

二 后置通知

package com.hsp.aop;import java.lang.reflect.Method;import org.springframework.aop.AfterReturningAdvice;public class MyAfterReturningAdvice implements AfterReturningAdvice {    @Override    public void afterReturning(Object arg0, Method arg1, Object[] arg2,            Object arg3) throws Throwable {        // TODO Auto-generated method stub        System.out.println("关闭资源...");    }}

三 环绕通知

package com.hsp.aop;import org.aopalliance.intercept.MethodInterceptor;import org.aopalliance.intercept.MethodInvocation;public class MyMethodInterceptor implements MethodInterceptor {    @Override    public Object invoke(MethodInvocation arg0) throws Throwable {        // TODO Auto-generated method stub        System.out.println("调用方法前");        Object  obj = arg0.proceed();        System.out.println("调用方法后");        return obj;    }}

四 异常通知

package com.hsp.aop;import java.lang.reflect.Method;import org.springframework.aop.ThrowsAdvice;public class MyThrowsAdvice implements ThrowsAdvice {        public void afterThrowing(Method m,Object[] os,Object target,Exception e)        {                System.out.println("出大事了"+e.getMessage());        }}

五 配置文件

<?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:tx="http://www.springframework.org/schema/tx";                xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-2.5.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.5.xsd";                                ><!-- 配置被代理的对象 --><bean id="test1Service" class="com.hsp.aop.Test1Service"><property name="name" value="顺平" /></bean><!-- 配置前置通知        proxyFactoryBean implements TestServiceInter,TestServiceInter2{                public void sayHello();        }                思考        interface Inter1{};        class A implements Inter1,Inter2{        }        Inter1 a=new A();        Inter2 b=(Inter2)a;--><bean id="MyMethodBeforeAdvice" class="com.hsp.aop.MyMethodBeforeAdvice" /><bean id="myAfterReturningAdvice" class="com.hsp.aop.MyAfterReturningAdvice" /><bean id="myMethodInterceptor" class="com.hsp.aop.MyMethodInterceptor" /><bean id="myThrowsAdvice" class="com.hsp.aop.MyThrowsAdvice "/><!-- 配置代理对象 --><bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"><!-- 代理接口集 --><property name="proxyInterfaces">        <list>                <value>com.hsp.aop.TestServiceInter</value>                <value>com.hsp.aop.TestServiceInter2</value>        </list></property><!-- 把通知织入到代理对象  --><property name="interceptorNames">        <!-- 相当于包MyMethodBeforeAdvice前置通知和代理对象关联,我们也        可以把通知看出拦截器,struts2核心拦截器 -->        <list>                <value>MyMethodBeforeAdvice</value>                <value>myAfterReturningAdvice</value>                <value>myMethodInterceptor</value>                <value>myThrowsAdvice</value>        </list></property><!-- 配置被代理对象,可以指定 --><property name="target" ref="test1Service"/></bean></beans>

六 运行结果

记录日志...sayHello

调用方法前

hi 顺平

调用方法后

关闭资源...

记录日志...sayBye

调用方法前

bye 顺平

调用方法后

关闭资源...