接口类:

public interface Service {   public void print();}

实现类

package com.tao.proxy;public class ServiceImpl implements Service {    @Override public void print() {        System.out.println("hello"); }}

代理类

public class TaoInvoker implements InvocationHandler {    private Object object ; public TaoInvoker() {    }    public TaoInvoker(Object object) {        this.object = object; }    public Object newProxy(Object target){        this.object = target; return Proxy.newProxyInstance(target.getClass().getClassLoader(),target.getClass().getInterfaces(),this); }    @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {        System.out.println("加强代码"); return method.invoke(object, args); }    public static void main(String[] args) {        Service service = new ServiceImpl(); Service o = (Service) new TaoInvoker().newProxy(new ServiceImpl()); o.print(); }}
加强代码hello