java 聊天源码

以下是一个简单的 Java 聊天室的源码，基于 Java Socket 实现：

服务端代码：

import java.io.*;
import java.net.*;

public class Server {
    static final int PORT = 5000;

    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(PORT);
        System.out.println("Server started.");

        while (true) {
            Socket socket = server.accept();
            System.out.println("New client connected.");

            BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

            out.println("Welcome to the chat room.");

            String inputLine;
            while ((inputLine = in.readLine()) != null) {
                System.out.println("Message from client: " + inputLine);
                out.println("You said: " + inputLine);
            }

            in.close();
            out.close();
            socket.close();
        }
    }
}

客户端代码：

import java.io.*;
import java.net.*;

public class Client {
    static final String HOST = "localhost";
    static final int PORT = 5000;

    public static void main(String[] args) throws IOException {
        Socket socket = new Socket(HOST, PORT);

        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);

        BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
        String userInput;
        while ((userInput = stdIn.readLine()) != null) {
            out.println(userInput);
            System.out.println(in.readLine());
        }

        in.close();
        out.close();
        stdIn.close();
        socket.close();
    }
}

运行 Server 类，然后运行多个 Client 类进行模拟多人聊天。