java写一个简易聊天程序

服务器端

package com.cs;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;

@SuppressWarnings("all")
public class TCPServer {
    private static int port = 6077; //服务器端口

    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(port);
        Socket socket = server.accept();
        InputStream is = socket.getInputStream();
        OutputStream os = socket.getOutputStream();
        Scanner sc = new Scanner(System.in);
        String msg = "";
        do {
            byte[] bytes = new byte[1024];
            int len = is.read(bytes);
            System.out.println("客户端：" + new String(bytes, 0, len));
            System.out.println("服务器端：");
            msg = sc.next();
            os.write(msg.getBytes());
        } while ((msg.equals("退出")) != true);
        socket.close();
        server.close();

    }
}

客户端

package com.mvc.chat;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Scanner;

/**
 * 简易聊天小程序
 *
 * @author liuwenlong
 * @create 2021-04-17 10:25:39
 */
@SuppressWarnings("all")
public class TcpClient {
    private static String host = "这里写服务器的IP";//连接的服务器IP地址
    private static int port = 6077; //服务器端口

    public static void main(String[] args) throws IOException {
        Socket socket = new Socket(host, port); //创建Socket
        OutputStream os = socket.getOutputStream();
        InputStream is = socket.getInputStream();
        Scanner sc = new Scanner(System.in);
        String msg = "";
        do {
            System.out.println("客户端：");
            msg = sc.next(); //输入
            os.write(msg.getBytes());//写入到服务器
            byte[] bytes = new byte[1024];
            int len = is.read(bytes);
            System.out.println("服务器端：" + new String(bytes, 0, len));
        } while ((msg.equals("退出")) != true);
        socket.close();
    }
}