Server.java

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.net.ServerSocket;
import java.net.Socket;

/**
 *
 * @author fachrur_122
 */
public class Server {
    private ServerSocket serverSocket = null;
    private Socket socket = null;
    private ObjectInputStream inputStream = null;
    private FileEvent fileEvent;
    private File dstFile = null;
    private FileOutputStream fileOutputStream = null;
    
    public Server() {  }
    
    //Accept socket connection
    public void doConnect() {
        try {
            serverSocket = new ServerSocket(4445);
            socket = serverSocket.accept();
            inputStream = new ObjectInputStream(socket.getInputStream());
        } catch (IOException e) { e.printStackTrace(); }
    }
    
    //Reading the FileEvent object then copy the file to the disk
    public void downloadFile() {
        try {
            fileEvent = (FileEvent) inputStream.readObject();
            if (fileEvent.getStatus().equalsIgnoreCase("Error")) {
                System.out.println("Error occurred ..So exiting");
                System.exit(0);
            }
            String outputFile = fileEvent.getDestinationDirectory() + fileEvent.getFilename();
            if (!new File(fileEvent.getDestinationDirectory()).exists()) { new File(fileEvent.getDestinationDirectory()).mkdirs(); }
            dstFile = new File(outputFile);
            fileOutputStream = new FileOutputStream(dstFile);
            fileOutputStream.write(fileEvent.getFileData());
            fileOutputStream.flush();
            fileOutputStream.close();
            System.out.println("Output file : " + outputFile + " is successfully saved ");
            Thread.sleep(3000);
            System.exit(0);
        } catch (IOException e) { e.printStackTrace(); }
        catch (ClassNotFoundException e) { e.printStackTrace(); }
        catch (InterruptedException e) { e.printStackTrace(); }
    }
    
    
    
    public static void main(String[] args) {
        // TODO code application logic here
        Server server = new Server();
        server.doConnect();
        server.downloadFile();
    }
    
}