Java通过套接字发送和接收文件（字节[]）

Question

我正在尝试开发一个非常简单的客户端/服务器，其中客户端将文件转换为字节，将其发送到服务器，然后将字节转换回文件。

当前，程序仅创建一个空文件。我不是一名出色的Java开发人员，因此不胜感激。

这是接收客户端发送的内容的服务器部分。

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);

这是客户端部分

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();