无法使用套接字发送大文件

Question

I am trying to make a Server Client structure thats sends files but I am having problems when I send large files with size more than 200 MB. I send them using ObjectOutputStream with my own object that has the file in a byte array and where I want to save it using the Apache commons libary.

Client SendMethod

try{
        Socket s = new Socket(ip, serverPort);

        ObjectOutputStream output = new ObjectOutputStream(s.getOutputStream());

        FileInputStream file = new FileInputStream(ClientFilePath+"\\"+ClientFileName);

        datainBytes = IOUtils.toByteArray(file);

        Packet paquete = new Packet(datainBytes,ServerFileDirectory,ClientFileName);

        output.writeObject(paquete);
        output.close();

    } catch (ConnectException e){
        //noinspection MagicConstant
        JOptionPane.showMessageDialog(contentPane,"Conexion perdida","ERROR",0);
    } catch(FileNotFoundException e){
        JOptionPane.showMessageDialog(contentPane,"No tienes permisos para movere este archivo","ERROR",0);
    } catch(IOException e) {
        e.printStackTrace();
    }

Server ReceiveMethod

Packet paquete = null;

    try {

        //ClientIN is the input from the client initialized earlier
        paquete = (Packet) ClientIN.readObject();

    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }

    FileUtils.writeByteArrayToFile(new File(paquete.getFilePathDestiny()+"\\"+paquete.getFileName()), paquete.getData());

The exact problem that I have is the server is trying to read the file but hangs and it does nothing.

Answer 1

Using an Object/Stream is usually only a good idea if you are sending objects. In this case you are sending a file which you can stream progressively to the server. If you stream the data, it can be of any size eg >> 2 GB.

Rather than hanging I suspect it's just taking a very long time. Object/Stream are versatile but not very fast for large amounts of data.