Java如何让服务器向每个连接的客户端发送消息

import java.io.IOException;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

public class Server {
    private List<Socket> clientSockets;

    public Server() {
        clientSockets = new ArrayList<>();
    }

    public void start(int port) {
        try {
            ServerSocket serverSocket = new ServerSocket(port);
            System.out.println("Server started on port " + port);

            while (true) {
                Socket clientSocket = serverSocket.accept();
                clientSockets.add(clientSocket);
                System.out.println("New client connected: " + clientSocket.getInetAddress().getHostAddress());

                // 创建一个新的线程处理客户端连接
                Thread clientThread = new Thread(new ClientHandler(clientSocket));
                clientThread.start();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void sendMessageToAllClients(String message) {
        for (Socket clientSocket : clientSockets) {
            try {
                OutputStream outputStream = clientSocket.getOutputStream();
                outputStream.write(message.getBytes());
                outputStream.flush();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    private class ClientHandler implements Runnable {
        private Socket clientSocket;

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

        @Override
        public void run() {
            try {
                while (true) {
                    // 接收客户端消息
                    // ...

                    // 处理客户端消息
                    // ...

                    // 向客户端发送消息
                    // ...
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        Server server = new Server();
        server.start(8080);
    }
}