javasocket编程实现聊天程序

Java Socket编程可以实现基于网络的聊天程序。下面是一个简单的示例代码：

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

public class ChatServer {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(8888);
        System.out.println("服务器已启动，等待客户端连接...");

        Socket socket = serverSocket.accept();
        System.out.println("客户端已连接，IP地址为：" + socket.getInetAddress().getHostAddress());

        BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        PrintWriter writer = new PrintWriter(socket.getOutputStream(), true);

        String line;
        while ((line = reader.readLine()) != null) {
            System.out.println("客户端说：" + line);
            writer.println("服务器回应：" + line);
        }

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

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

public class ChatClient {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("localhost", 8888);
        System.out.println("已连接服务器，IP地址为：" + socket.getInetAddress().getHostAddress());

        BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        PrintWriter writer = new PrintWriter(socket.getOutputStream(), true);

        BufferedReader consoleReader = new BufferedReader(new InputStreamReader(System.in));

        String line;
        while ((line = consoleReader.readLine()) != null) {
            writer.println(line);
            System.out.println("服务器回应：" + reader.readLine());
        }

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

以上代码实现了一个简单的聊天程序，客户端和服务器端通过Socket建立连接，通过输入输出流进行通信。