编写Java服务器以并发(同时)处理多个客户端

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class ConcurrentServer {

    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(8080);
        System.out.println("Server started.");

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

            // 创建一个新的线程来处理客户端请求
            ClientHandler clientHandler = new ClientHandler(clientSocket);
            Thread thread = new Thread(clientHandler);
            thread.start();
        }
    }

    private static class ClientHandler implements Runnable {
        private final Socket clientSocket;

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

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

                String inputLine;
                while ((inputLine = reader.readLine()) != null) {
                    System.out.println("Received from client: " + inputLine);
                    // 在这里进行业务处理，根据客户端请求返回相应的结果
                    String response = "Hello, client!";
                    writer.println(response);
                }

                clientSocket.close();
                System.out.println("Client disconnected.");

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}