So implementieren Sie die Chat-Funktion mithilfe von TCP in der Java-Netzwerkprogrammierung

package com.kuang.lesson02;

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;

//客户端
public class TcpClientDemo01 {
    public static void main(String[] args) {
        Socket socket = null;
        OutputStream os = null;

        try {
            //1、要知道服务器的地址、端口号
            InetAddress serverIP = InetAddress.getByName("127.0.0.1");
            int port = 9999;

            //2、创建一个socket连接
            socket = new Socket(serverIP, port);

            //3、发送消息IO流
            os = socket.getOutputStream();
            os.write("你好，Java".getBytes());
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}