12月20日

今天继续学习网络编程
多线程服务器
在实际应用中，服务器通常需要同时处理多个客户端连接。多线程服务器可以通过为每个客户端连接创建一个新线程来实现。例如：

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

public class MultiThreadedServer {
public static void main(String[] args) {
try (ServerSocket serverSocket = new ServerSocket(12345)) {
System.out.println("Server is listening on port 12345");

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

            Thread thread = new ClientHandler(clientSocket);
            thread.start();
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

static class ClientHandler extends Thread {
    private final Socket clientSocket;

    public ClientHandler(Socket socket) {
        this.clientSocket = socket;
    }

    @Override
    public void run() {
        try (PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
             BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()))) {

            String request = in.readLine();
            System.out.println("Client request: " + request);
            out.println("Hello, Client!");
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                clientSocket.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

}
在这个例子中，服务器为每个客户端连接创建一个ClientHandler线程，处理客户端请求并发送响应。
通过今天的学习，我对Java网络编程有了较为深入的了解。