Spring AOP Pre-enhancement, post-enhancement small demo

Waiter Interface Waiter.java

Package Com.paic.zhangqi.spring.aop;public interface Waiter {void Greetto (string name); void Serveto (string name);}

Waiter Interface Implementation class Naivewaiter.java

Package Com.paic.zhangqi.spring.aop;public class Naivewaiter implements waiter {@Overridepublic void Greetto (String Name) {System.out.println ("Greet to" +name+ "...");} @Overridepublic void Serveto (String name) {System.out.println ("serving" +name+ "...");}}

predecessor Enhancement class Greetingbeforeadvice.java executes before the target class method executes

Package Com.paic.zhangqi.spring.aop;import Java.lang.reflect.method;import Org.springframework.aop.methodbeforeadvice;public class Greetingbeforeadvice implements Methodbeforeadvice {@ Overridepublic void Before (method, object[] args, Object obj) throws Throwable {string clientName = (string) args[0] ; System.out.println ("How is you! Mr. "+clientname+". ");}

post-Enhancement classGreetingafteradvice.javaexecutes after the target class method call

Package Com.paic.zhangqi.spring.aop;import Java.lang.reflect.method;import Org.springframework.aop.afterreturningadvice;public class Greetingafteradvice implements Afterreturningadvice {@ overridepublic void Afterreturning (Object arg0, Method arg1, object[] arg2,object arg3) throws Throwable {System.out.prin TLN ("Please enjoy yourself!");}

Test Class Testadvice.java

Package Com.paic.zhangqi.spring.aop;import Org.springframework.aop.afteradvice;import Org.springframework.aop.beforeadvice;import Org.springframework.aop.framework.proxyfactory;public Class Testadvice {public static void main (string[] args) {Waiter target = new Naivewaiter (); Beforeadvice beforeadvice = new Greetingbeforeadvice (); Afteradvice afteradvice = new Greetingafteradvice ();//Spring provides proxy factory proxyfactory PF = new Proxyfactory ();//Set proxy target Pf.set Target (target);//Add Enhanced Pf.addadvice (Beforeadvice);p F.addadvice (Afteradvice) for the proxy target;//Generate proxy instance Waiter proxy = (waiter) Pf.getproxy ();p Roxy.greetto ("John");p Roxy.serveto ("Tomcat");}

Output results

How is you! Mr.John.greet to John ... Please enjoy yourself! How is you! Mr.Tomcat.serving Tomcat ... Please enjoy yourself!

configuring with a configuration file Beans.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:p= "http://www.springframework.org/schema/p" xsi: schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/ Spring-beans-3.0.xsd "><bean id=" Greetingbefore "class=" Com.paic.zhangqi.spring.aop.GreetingBeforeAdvice "/ ><bean id= "Greetingafter" class= "Com.paic.zhangqi.spring.aop.GreetingAfterAdvice"/><bean id= "target" class= "Com.paic.zhangqi.spring.aop.NaiveWaiter"/><bean id= "Waiter" class= " Org.springframework.aop.framework.ProxyFactoryBean "><property name=" proxyinterfaces "value=" Com.paic.zhangqi.spring.aop.Waiter "/><property name=" Interceptornames "value=" Greetingbefore,greetingafter "/><property name=" target "ref=" target "/></bean></beans>

the corresponding test classSpringconfigtest.java

Package Com.paic.zhangqi.spring.aop;import Org.springframework.context.applicationcontext;import Org.springframework.context.support.classpathxmlapplicationcontext;public class Springconfigtest {public static void Main (string[] args) {String Configpath = "Com/paic/zhangqi/spring/aop/beans.xml"; ApplicationContext CTX = new Classpathxmlapplicationcontext (Configpath); Waiter waiter = (waiter) Ctx.getbean ("Waiter"); Waiter.greetto ("John"); Waiter.serveto ("Tomcat");}}

Also get output

How is you! Mr.John.greet to John ... Please enjoy yourself! How is you! Mr.Tomcat.serving Tomcat ... Please enjoy yourself!

Spring AOP Pre-enhancement, post-enhancement small demo