我正在嘗試開發一個非常簡單的客戶端/服務器，其中客戶端將文件轉換為字節，將其發送到服務器，然后將字節轉換回文件。當前，程序僅創建一個空文件。我不是一名出色的Java開發人員，因此不勝感激。這是接收客戶端發送的內容的服務器部分。ServerSocket serverSocket = null;    serverSocket = new ServerSocket(4444);    Socket socket = null;    socket = serverSocket.accept();    DataOutputStream out = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));    DataInputStream in = new DataInputStream(new BufferedInputStream(socket.getInputStream()));    byte[] bytes = new byte[1024];    in.read(bytes);    System.out.println(bytes);    FileOutputStream fos = new FileOutputStream("C:\\test2.xml");    fos.write(bytes);這是客戶端部分Socket socket = null;    DataOutputStream out = null;    DataInputStream in = null;    String host = "127.0.0.1";         socket = new Socket(host, 4444);    out = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));    in = new DataInputStream(new BufferedInputStream(socket.getInputStream()));    File file = new File("C:\\test.xml");    //InputStream is = new FileInputStream(file);    // Get the size of the file    long length = file.length();    if (length > Integer.MAX_VALUE) {        System.out.println("File is too large.");    }    byte[] bytes = new byte[(int) length];    //out.write(bytes);    System.out.println(bytes);    out.close();    in.close();    socket.close();