[网络协议]黑马JAVA P183 TCP通信实现：多发多收消息、实现可以同时接收多个客户端

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package com.itheima.d7_socket3;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.Socket;

public class ServerReaderThread extends Thread{
    private Socket socket;
    public ServerReaderThread(Socket socket){
        this.socket = socket;
    }
    @Override
    public void run() {
        try {
            //3.从socket通信管道中得到一个字节输入流
            InputStream is = socket.getInputStream();
            //4.把字节输入流包装成缓冲字符输入流进行消息的接收
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            //5.按照行读取消息
            String msg;
            while ((msg = br.readLine()) != null){
                System.out.println(socket.getRemoteSocketAddress() + "说了：" + msg);
            }
        } catch (Exception e) {
            System.out.println(socket.getRemoteSocketAddress() + "下线了！！！！");
        }
    }
}

package com.itheima.d7_socket3;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * 目标：实现服务端可以同时处理多个客户端的消息。
 */
public class ServeDemo2 {
    public static void main(String[] args) {
        try {
            System.out.println("======服务端启动成功=========");
            //1.注册端口
            ServerSocket serverSocket = new ServerSocket(7777);
            //a.定义一个死循环由主线程负责不断的接收客户端的Socket管道连接。
           while(true){
                //2.每接收到一个客户端的Socket管道，交给一个独立的子线程负责读取消息
               Socket socket = serverSocket.accept();
               System.out.println(socket.getRemoteSocketAddress() + "他来了，上线了！");
               //3.开始创建独立线程处理socket
               new ServerReaderThread(socket).start();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

package com.itheima.d7_socket3;

import java.io.OutputStream;
import java.io.PrintStream;
import java.net.Socket;
import java.util.Scanner;

/**
 * 目标：实现多发多收
 */
public class ClientDemo1 {
    public static void main(String[] args) {
        try {
            System.out.println("====客户端启动====");
            //1.创建Socket通信管道请求有服务端的连接
            //public Socket(String host, int port)
            //参数一：服务端的IP地址
            //参数二：服务端的端口
            Socket socket = new Socket("127.0.0.1",7777);

            //2.从socket通信管道中得到一个字节输出流  负责发送数据
            OutputStream os = socket.getOutputStream();

            //3.把低级的字节流包装成打印流
            PrintStream ps = new PrintStream(os);

            Scanner sc  = new Scanner(System.in);
            while (true){
                System.out.println("请说：");
                String msg = sc.nextLine();
                //4.发送消息
                ps.println(msg);
                ps.flush();
            }

            //关闭资源。
//            socket.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

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