利用java的网络编程实现一个小游戏（类似于石头剪刀布）

定义服务器端 

package com.briup.day25.home;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;
import java.util.Map;

public class Home6_CardServer {
    public static void main(String[] args) throws Exception{
        //实例化套接字对象 绑定端口号
        ServerSocket server = new ServerSocket(8080);
        System.out.println("服务器8080即将启动");
        //接收客户端的连接
        Socket socket = server.accept();
        System.out.println("客户端连接成功");
        //从套接字中获取
        InputStream is =socket.getInputStream();
        InputStreamReader isr = new InputStreamReader(is);
        BufferedReader br = new BufferedReader(isr);
        OutputStream os =socket.getOutputStream();
        PrintStream ps = new PrintStream(os);

        //业务实现
        Map<Integer,String> map = new HashMap<>();
        map.put(3,"国王");
        map.put(2,"平民");
        map.put(1,"奴隶");
        //System.out.println(line);
        while (true) {
        String line = br.readLine();

            if ("quit".equals(line))
                break;

            int m = Integer.parseInt(line);
            int n = (int) (Math.random() * 3 + 1);
            //我输入了平民系统输出了平民你赢了
            //请输入您的卡牌
            //我输入了平民系统输出了平民你赢了
            if ((m == 3 && n != 1) || (m == 2 && n != 3) || (m == 1 && n == 3))
                ps.println("我输入了" + map.get(m) + "系统输出了" + map.get(n) + "你赢了");
            if ((m == 3 && n == 1) || (m == 2 && n == 1) || (m == 1 && n != 3))
                ps.println("我出了" + map.get(m) + "系统输出了" + map.get(n) + "你输了");
            if ((m == 3 && n==3) || (m==2 && n==2) || (m==1 && n==1))
                ps.println("我出" + map.get(m) + "系统输出了" + map.get(n) + "平局");

//        String line = null;
//        while ((line = br.readLine())!=null){
//
//        }
       }


        //关闭流
        server.close();
    }

}

 定义客户端

package com.briup.day25.home;

import java.io.*;
import java.net.Socket;
import java.util.Scanner;

public class Home7_CardCilent {
    public static void main(String[] args) throws IOException {
        Socket cilent =new Socket("127.0.0.1",8080);

        InputStream is = cilent.getInputStream();
        BufferedReader bs = new BufferedReader(new InputStreamReader(is));
        OutputStream os = cilent.getOutputStream();
        PrintStream ps = new PrintStream(os);

        Scanner sc = new Scanner(System.in);
        String line;
        int count =0;
        while (true){
            System.out.println( "请输入您的卡牌");
            line = sc.nextLine();
            if (!("1".equals(line)||("2".equals(line)||("3".equals(line))))){
                System.out.println("error");
                continue;
            }
            ps.println(line);
            line = bs.readLine();
            System.out.println(line);
            if (line.contains("赢"))
                count++;
            if (count == 3){
                System.out.println("你已经推平对方水晶，victory");
                break;
            }
        }

        cilent.close();
    }
}