package com.yhouse.modules.daos;

public interface IUserDao {

    public String getUserName();

    public String Say();

}

package com.yhouse.modules.daos;

import java.lang.reflect.InvocationHandler;

import java.lang.reflect.Method;

public class MethodProxy implements InvocationHandler {

    @Override

    public Object invoke(Object proxy, Method method, Object[] args)  throws Throwable {

        //如果传进来是一个已实现的具体类（本次演示略过此逻辑)

        if (Object.class.equals(method.getDeclaringClass())) {

            try {

                return method.invoke(this, args);

            } catch (Throwable t) {

                t.printStackTrace();

            }

        //如果传进来的是一个接口（核心)

        } else {

            System.out.println(method.getName());

            return run(method, args);

        }

        return null;

    }

    /**

     * 实现接口的核心方法

     * @param method

     * @param args

     * @return

     */

    public Object run(Method method,Object[] args){

        //TODO

        //如远程http调用

        //如远程方法调用（rmi)

        //....

       return "method call success!";

    }

}

package com.yhouse.modules.daos;

import java.lang.reflect.Proxy;

public class Test {

    public static void main(String[] args) throws ClassNotFoundException {

        // TODO Auto-generated method stub

         String className = "com.yhouse.modules.daos.IUserDao";

          String methodName = "Say";

          Class clz = Class.forName(className);

          // Object newProxyInstance = Proxy.newProxyInstance(IUserDao.class.getClassLoader(),  new Class[]{IUserDao.class},m);

        MethodProxy m=new MethodProxy();

         Object newProxyInstance = Proxy.newProxyInstance(clz.getClassLoader(),  new Class[]{clz},m);

         IUserDao ud=((IUserDao)newProxyInstance);

        String s= ud.getUserName();

         System.out.println(s);

      String s1=ud.Say();

         System.out.println(s1);

    }

}