Spring AOP配置 动态代理

ProxyInter借口：

package com.aspect;public interface ProxyInter {//租房public void rent();//退房public void cancelHouse();}

Owner类实现ProxyInter接口

package com.aspect;public class Owner implements ProxyInter {public void rent() {System.out.println("租房");}public void cancelHouse(){System.out.println("退房");}}

代理类Proxy也实现ProxyInter接口

package com.aspect;public class Proxy implements ProxyInter {public void rent() {ProxyInter proxy = new Owner();proxy.rent();}public void cancelHouse(){ProxyInter proxy = new Owner();proxy.cancelHouse();}}

客户Client

package com.aspect;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Client {public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");//给ProxyInter接口的所有方法+通知ProxyInter proxy = (ProxyInter)context.getBean("proxyFactoryBean");//只给rent方法+通知//ProxyInter proxy = (ProxyInter)context.getBean("owner");proxy.rent();//proxy.cancelHouse();}}

环绕通知SurroundAdvice

package com.aspect;import org.aopalliance.intercept.MethodInterceptor;import org.aopalliance.intercept.MethodInvocation;public class SurroundAdvice implements MethodInterceptor{public Object invoke(MethodInvocation invocation) throws Throwable {System.out.println("欢迎您,请喝茶");Object object = invocation.proceed();System.out.println("加钱");return object;}}

前置通知BeforeAdvice

package com.aspect;import java.lang.reflect.Method;import org.springframework.aop.MethodBeforeAdvice;public class BeforeAdvice implements MethodBeforeAdvice{public void before(Method arg0, Object[] arg1, Object arg2)throws Throwable {System.out.println("租房之前");}}

后置通知AfterAdvice

package com.aspect;import java.lang.reflect.Method;import org.springframework.aop.AfterReturningAdvice;public class AfterAdvice implements AfterReturningAdvice{public void afterReturning(Object arg0, Method arg1, Object[] arg2,Object arg3) throws Throwable {System.out.println("租房之后");}}

web.xml如下

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"><context-param><param-name>contextConfigLoaction</param-name><param-value>classpath:applicationContext.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>  <welcome-file-list>    <welcome-file>index.jsp</welcome-file>  </welcome-file-list></web-app>

 

applicationContext.xml配置文件如下

<?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: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.xsd      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">       <bean id="surroundAdvice" class="com.aspect.SurroundAdvice"/><bean id="beforeAdvice" class="com.aspect.BeforeAdvice"/><bean id="afterAdvice" class="com.aspect.AfterAdvice"/><bean id="owner" class="com.aspect.Owner"/><bean id="proxyFactoryBean" class="org.springframework.aop.framework.ProxyFactoryBean"><property name="proxyInterfaces" value="com.aspect.ProxyInter"/><property name="target" ref="owner"/><property name="interceptorNames"><list><value>surroundAdvice</value><value>beforeAdvice</value><value>afterAdvice</value></list></property></bean></beans>

在Client中
ProxyInter proxy = (ProxyInter)context.getBean("proxyFactoryBean");得到代理对象执行

结果如下：

欢迎您,请喝茶租房之前租房租房之后加钱

 

如果想要只给接口的rent方法加环绕通知,如下操作：

修改applicationContext.xml配置文件如下:

<?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: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.xsd      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">       <bean id="surroundAdvice" class="com.aspect.SurroundAdvice"/><bean id="beforeAdvice" class="com.aspect.BeforeAdvice"/><bean id="afterAdvice" class="com.aspect.AfterAdvice"/><bean id="owner" class="com.aspect.Owner"/><aop:config><aop:pointcut id="serviceMethod"expression="execution(* com.aspect.ProxyInter.rent(..))"/><aop:advisor advice-ref="surroundAdvice" pointcut-ref="serviceMethod"/></aop:config></beans>

在Client中
ProxyInter proxy = (ProxyInter)context.getBean("owner");得到代理对象执行即可

结果如下在Client中
ProxyInter proxy = (ProxyInter)context.getBean("proxyFactoryBean");得到代理对象执行

结果如下:

欢迎您,请喝茶租房加钱

而执行proxy.cancelHouse()方法则没有环绕通知

上面这种配置需要导入的4个jar包如下：

aspectjrt.jar

aspectjweaver.jar

commons-logging-1.0.4.jar

spring.jar