package com.xiaosong.proxy.demo.service;/*** Hello world!**/
public interface IHello {public void sayHello();}

package com.xiaosong.proxy.demo.service.impl;import com.xiaosong.proxy.demo.service.IHello;public class Hello implements IHello {public void sayHello() {// TODO Auto-generated method stubSystem.out.println("Hello KuGou!");}
}

package com.xiaosong.proxy.demo.jdkproxy;import com.xiaosong.proxy.demo.service.IHello;
import com.xiaosong.proxy.demo.service.impl.Hello;public class StaticProxy implements IHello{public Hello hello;public StaticProxy (Hello hello){this.hello=hello;}public void sayHello() {System.out.println("before Hello...");hello.sayHello();System.out.println("after Hello...");}}

package com.xiaosong.proxy.demo.jdkproxy;import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;public class MyInvocationHandler implements InvocationHandler {//代理目标对象public Object object;public MyInvocationHandler(Object object) {// TODO Auto-generated constructor stubthis.object=object;}//获取代理对象工具方法public Object getProxyObject(){//object.getClass().getClassLoader()确保类加载器为代理目标的加载器return Proxy.newProxyInstance(object.getClass().getClassLoader(), object.getClass().getInterfaces(), this);}public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {System.out.println("前置方法...");//这里入参要是object,不能是proxy,否则造成死循环,后续会详细分析原因Object rs = method.invoke(object, args);System.out.println("后置方法...");return rs;}}