java代码 个人聊天室 要求： 1. 可使用文字聊天 2. 可以发送文件 3. 可以私聊 代码

很抱歉，由于代码比较长，无法在这里直接贴出。不过，以下是具体的实现步骤和代码结构，供你参考：

1. 服务器端

（1）创建一个 ServerSocket 对象，用于监听客户端的连接请求。

ServerSocket serverSocket = new ServerSocket(port);

（2）创建一个 HashMap 用于保存所有已连接的客户端。

Map<String, Socket> clientMap = new HashMap<>();

（3）使用 while 循环来等待客户端的连接请求，并在接收到请求后开启一个新的线程来处理客户端的请求。

while (true) {
    Socket socket = serverSocket.accept();
    new ServerThread(socket, clientMap).start();
}

（4）在线程中使用输入输出流来实现客户端之间的通信，并实现文字聊天、发送文件和私聊等功能。

2. 客户端

（1）创建一个 Socket 对象，用于连接服务器。

Socket socket = new Socket(host, port);

（2）使用输入输出流来发送和接收数据，并实现文字聊天、发送文件和私聊等功能。

具体的代码实现可以参考下面的示例代码：

ServerThread.java

import java.io.*;
import java.net.Socket;
import java.util.Map;

public class ServerThread extends Thread {
    private Socket socket;
    private Map<String, Socket> clientMap;

    public ServerThread(Socket socket, Map<String, Socket> clientMap) {
        this.socket = socket;
        this.clientMap = clientMap;
    }

    public void run() {
        try {
            BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
            String clientName = reader.readLine();

            System.out.println(clientName + " connected");

            // 将新连接的客户端添加到客户端列表中
            clientMap.put(clientName, socket);

            String line;
            while ((line = reader.readLine()) != null) {
                if (line.equals("quit")) {
                    break;
                } else if (line.startsWith("@")) {
                    // 私聊功能
                    String[] tokens = line.split(" ");
                    String targetClientName = tokens[0].substring(1);
                    String message = line.substring(tokens[0].length() + 1);
                    Socket targetSocket = clientMap.get(targetClientName);
                    if (targetSocket != null) {
                        BufferedWriter targetWriter = new BufferedWriter(new OutputStreamWriter(targetSocket.getOutputStream()));
                        targetWriter.write(clientName + " : " + message + "\n");
                        targetWriter.flush();
                    } else {
                        writer.write("Client " + targetClientName + " not found\n");
                        writer.flush();
                    }
                } else if (line.startsWith("#")) {
                    // 发送文件功能
                    String[] tokens = line.split(" ");
                    String targetClientName = tokens[0].substring(1);
                    String fileName = tokens[1];
                    Socket targetSocket = clientMap.get(targetClientName);
                    if (targetSocket != null) {
                        FileInputStream fileInputStream = new FileInputStream(fileName);
                        OutputStream outputStream = targetSocket.getOutputStream();
                        byte[] buffer = new byte[1024];
                        int len;
                        while ((len = fileInputStream.read(buffer)) != -1) {
                            outputStream.write(buffer, 0, len);
                        }
                        outputStream.flush();
                        fileInputStream.close();
                        writer.write("File " + fileName + " sent to " + targetClientName + "\n");
                        writer.flush();
                    } else {
                        writer.write("Client " + targetClientName + " not found\n");
                        writer.flush();
                    }
                } else {
                    // 文字聊天功能
                    for (Socket clientSocket : clientMap.values()) {
                        if (clientSocket != socket) {
                            BufferedWriter clientWriter = new BufferedWriter(new OutputStreamWriter(clientSocket.getOutputStream()));
                            clientWriter.write(clientName + " : " + line + "\n");
                            clientWriter.flush();
                        }
                    }
                }
            }

            // 将断开连接的客户端从客户端列表中移除
            clientMap.remove(clientName);

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

            System.out.println(clientName + " disconnected");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Server.java

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;
import java.util.Map;

public class Server {
    private int port;
    private Map<String, Socket> clientMap;

    public Server(int port) {
        this.port = port;
        this.clientMap = new HashMap<>();
    }

    public void start() throws IOException {
        ServerSocket serverSocket = new ServerSocket(port);
        System.out.println("Server started at port " + port);

        while (true) {
            Socket socket = serverSocket.accept();
            new ServerThread(socket, clientMap).start();
        }
    }

    public static void main(String[] args) throws IOException {
        Server server = new Server(8888);
        server.start();
    }
}

Client.java

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

public class Client {
    private String host;
    private int port;
    private String name;

    public Client(String host, int port, String name) {
        this.host = host;
        this.port = port;
        this.name = name;
    }

    public void start() throws IOException {
        Socket socket = new Socket(host, port);
        System.out.println("Connected to server");

        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        BufferedReader socketReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
        String line;

        // 发送客户端名称给服务器
        writer.write(name + "\n");
        writer.flush();

        while ((line = reader.readLine()) != null) {
            if (line.equals("quit")) {
                break;
            } else if (line.startsWith("@")) {
                // 私聊功能
                String[] tokens = line.split(" ");
                String targetClientName = tokens[0].substring(1);
                String message = line.substring(tokens[0].length() + 1);
                writer.write(line + "\n");
                writer.flush();
                String response = socketReader.readLine();
                System.out.println(response);
            } else if (line.startsWith("#")) {
                // 发送文件功能
                String[] tokens = line.split(" ");
                String targetClientName = tokens[0].substring(1);
                String fileName = tokens[1];
                File file = new File(fileName);
                if (file.exists()) {
                    writer.write(line + "\n");
                    writer.flush();
                    OutputStream outputStream = socket.getOutputStream();
                    FileInputStream fileInputStream = new FileInputStream(file);
                    byte[] buffer = new byte[1024];
                    int len;
                    while ((len = fileInputStream.read(buffer)) != -1) {
                        outputStream.write(buffer, 0, len);
                    }
                    outputStream.flush();
                    fileInputStream.close();
                    String response = socketReader.readLine();
                    System.out.println(response);
                } else {
                    System.out.println("File " + fileName + " not found");
                }
            } else {
                // 文字聊天功能
                writer.write(line + "\n");
                writer.flush();
            }
        }

        reader.close();
        socketReader.close();
        writer.close();
        socket.close();

        System.out.println("Disconnected");
    }

    public static void main(String[] args) throws IOException {
        Client client = new Client("localhost", 8888, "client1");
        client.start();
    }
}

上面的代码实现了一个简单的个人聊天室，可以实现文字聊天、发送文件和私聊等功能。你可以根据自己的需求进行修改和扩展。