设计模式13-代理模式

 
package org.demo.proxy.demo01;

public class Demo03 {
    public static void main(String[] args) {
        IUser user = new UserProxy(new UserImpl()) ;
        user.action() ;
    }

}



interface IUser{
    void action() ;
}


class UserImpl implements IUser{
    @Override
    public void action() {
        System.out.println("被代理的对象");
    }
} 


class UserProxy implements IUser{
    private IUser user ; 
    public UserProxy(IUser user) {
        this.user = user ;
    }
    @Override
    public void action() {
        System.out.println("调用被代理对象");
        user.action() ;
    }
}

调用被代理对象
被代理的对象

/**********************************************************************
 * <pre>
 * FILE : Demo02.java
 * CLASS : Demo02
 *
 * AUTHOR : Liaokailin
 *
 * FUNCTION : TODO
 *
 *
 *======================================================================
 * CHANGE HISTORY LOG
 *----------------------------------------------------------------------
 * MOD. NO.|   DATE   |   NAME  | REASON  | CHANGE REQ.
 *----------------------------------------------------------------------
 *             |2014-3-7|Liaokailin| Created |
 * DESCRIPTION:
 * </pre>
 ***********************************************************************/
package org.demo.proxy.demo01;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class Demo02 {

    /**
     * Function : 
     * @author : Liaokailin
     * CreateDate : 2014-3-7
     * version : 1.0
     * @param args
     */
    public static void main(String[] args) {
        
            Foo prox = (Foo)Proxy.newProxyInstance(Demo01.class.getClassLoader(), new Class[]{Foo.class}, new InvocationHandler(){

            @Override
            public Object invoke(Object proxy, Method method, Object[] args)
                    throws Throwable {
                  System.out.println(args[0]) ;
                System.out.println(  method.getName()) ;
                return null;
            }}) ;
         prox.f("Helll World")     ;  
    }

}


interface Foo{
    void f(String s) ;
    void g(int i) ;
}

Helll World
f