用java写一个多人聊天室项目 要求包含网络编程、IO流、读线程、GUI

好的，下面是一个简单的多人聊天室项目的代码示例，它包含了网络编程、I/O流、读线程和GUI。这个项目使用Java的Swing库来创建GUI的用户界面，使用Socket和ServerSocket类来实现网络编程。这个项目的主要思路是，客户端连接到服务器后，可以向服务器发送消息并接收其他客户端发送的消息。以下是代码示例：

### 服务端代码

import java.io.IOException;
import java.io.InputStream;
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<ClientThread> clients = new ArrayList<>();

    public void start() throws IOException {
        ServerSocket serverSocket = new ServerSocket(8888);
        while (true) {
            Socket socket = serverSocket.accept();
            ClientThread clientThread = new ClientThread(socket);
            clients.add(clientThread);
            clientThread.start();
        }
    }

    private void broadcast(String message, ClientThread sender) throws IOException {
        for (ClientThread client : clients) {
            if (client != sender) {
                client.sendMessage(message);
            }
        }
    }

    private class ClientThread extends Thread {
        private Socket socket;
        private InputStream inputStream;
        private OutputStream outputStream;

        public ClientThread(Socket socket) throws IOException {
            this.socket = socket;
            this.inputStream = socket.getInputStream();
            this.outputStream = socket.getOutputStream();
        }

        public void sendMessage(String message) throws IOException {
            outputStream.write(message.getBytes());
        }

        @Override
        public void run() {
            try {
                while (true) {
                    byte[] buffer = new byte[1024];
                    int length = inputStream.read(buffer);
                    if (length == -1) {
                        clients.remove(this);
                        break;
                    }
                    String message = new String(buffer, 0, length);
                    broadcast(message, this);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

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

### 客户端代码

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

public class Client extends JFrame {
    private JTextField textField;
    private JTextArea textArea;
    private JButton sendButton;
    private Socket socket;
    private InputStream inputStream;
    private OutputStream outputStream;

    public Client() {
        setTitle("多人聊天室");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        setLayout(new BorderLayout());

        textArea = new JTextArea();
        textArea.setEditable(false);
        add(new JScrollPane(textArea), BorderLayout.CENTER);

        JPanel inputPanel = new JPanel(new BorderLayout());
        add(inputPanel, BorderLayout.SOUTH);

        textField = new JTextField();
        inputPanel.add(textField, BorderLayout.CENTER);

        sendButton = new JButton("发送");
        inputPanel.add(sendButton, BorderLayout.EAST);

        sendButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String message = textField.getText();
                try {
                    sendMessage(message);
                    textField.setText("");
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
        });
    }

    private void connect() throws IOException {
        socket = new Socket("localhost", 8888);
        inputStream = socket.getInputStream();
        outputStream = socket.getOutputStream();

        Thread readThread = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    while (true) {
                        byte[] buffer = new byte[1024];
                        int length = inputStream.read(buffer);
                        if (length == -1) {
                            break;
                        }
                        String message = new String(buffer, 0, length);
                        textArea.append(message + "\n");
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });
        readThread.start();
    }

    private void sendMessage(String message) throws IOException {
        outputStream.write(message.getBytes());
    }

    public static void main(String[] args) throws IOException {
        Client client = new Client();
        client.setVisible(true);
        client.connect();
    }
}

这个代码示例是一个简单的多人聊天室的实现，它使用了Java中的Socket和ServerSocket类进行网络编程，使用了I/O流来进行数据传输，使用了读线程来实现异步读取数据，使用了Swing库来创建GUI的用户界面。当客户端连接到服务器后，可以向服务器发送消息并接收其他客户端发送的消息。