字节码学院之Java socket 控制台聊天室

Posted 2021-12-12

学了个把月基础，终于写出了一个双工通信的控制台版本的聊天室了，废话不说啦，直接上代码：
服务端代码

package com.zijiemaedu.socketdemo;

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

/**
 * @author: Mr-zhang
 * @create: 2019-05-30 09:48
 * @emall: [email protected]
 * @program: thread-demo
 * @ClassName: Server
 * @purpose:
 */
public class Server {
    public final static int PORT = 8888; // 服务端监听端口

    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(PORT); // 服务端对象
        Socket socket = server.accept(); // 等待客户端链接(导致程序阻塞)
        InputStream inputStream = socket.getInputStream();// 获取客户端发送过来的数据流
        OutputStream outputStream = socket.getOutputStream();// 获取客户端发送过来的数据流

        // 将流进行转换
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream));

        // 向客户端输出消息
        new Thread(new Runnable() {
            @Override
            public void run() {
                Scanner scanner = new Scanner(System.in);
                System.out.println("请输入您想发送给客户端的消息:");
                String line = scanner.next();
                while (line != null) {
                    try {
                        writer.write(line);
                        writer.newLine();
                        writer.flush();
                        System.out.println("请输入您想发送给客户端的消息:");
                        line = scanner.next();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();

        String line = null;

        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }

        socket.close();
        server.close();
    }
}

客户端代码：

package com.zijiemaedu.socketdemo;

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

/**
 * @author: Mr-zhangY
 * @create: 2019-05-30 09:57
 * @emall: [email protected]
 * @program: thread-demo
 * @ClassName: Client
 * @purpose:
 */
public class Client {
    private final static String HOST = "localhost";
    private final static int PORT = Server.PORT;

    public static void main(String[] args) throws IOException {
        Socket socket = new Socket(HOST, PORT); // 创建客户端socket
        OutputStream output = socket.getOutputStream();
        InputStream inputStream = socket.getInputStream(); // 获取服务端输入过来的消息流

        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(output));
        BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
        new Thread(() -> {
            try {
                while (true) {
                    String message = reader.readLine();
                    System.out.println("服务端响应了: " + message);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }).start();

        Scanner scanner = new Scanner(System.in);
        String input = scanner.next();

        while (input != null) {
            if ("q".equals(input)) {
                break;
            }

            writer.write(input);
            writer.newLine();
            writer.flush();
            input = scanner.next();
        }

        writer.close();
        socket.close();
    }
}

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