Java Source Code to Upload a File into FTP Server

Here is the simple java code which will help uploading a file into a destination ftp server.

@Credit: Parvesh Mehla

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.net.URL;

import java.net.URLConnection;

import javax.swing.JOptionPane;

public class UploadIntoFTP {

      UploadIntoFTP() {

      }

      private void doUpload() {

            // This is exact location of the file in the local server/machine

            // Source Location of the file

            File fileSource = new File("C:/demo.txt");

            // this is the file name only; not the lcoation

            String fileName = fileSource.getName();

            // Username and password to enter in to the ftp server

            String userName = "username";

            String password = "password";

            // this is the ftpserver details upto the folder in which file needs to

            // be uploaded

            String ftpServer = "ftpserverlocation/folderlocation";

            System.out.println(fileName);

            // Constructing the string buffer

            StringBuffer sb = new StringBuffer("ftp://");

            // check for authentication else assume its anonymous access.

            sb.append(userName);

            sb.append(':');

            sb.append(password);

            sb.append('@');

            sb.append(ftpServer);

            sb.append('/');

            sb.append(fileName);

            /*

             * UPloading mode type ==> a=ASCII mode, i=image (binary) mode, d= file

             * directory listing

             */

            sb.append(";type=a");

            System.out.println(sb.toString());

            BufferedInputStream bis = null;

            BufferedOutputStream bos = null;

            try {

                  URL url = new URL(sb.toString());

                  System.out.println(url);

                  URLConnection urlc = url.openConnection();

                  bos = new BufferedOutputStream(urlc.getOutputStream());

                  bis = new BufferedInputStream(new FileInputStream(fileSource));

                  int i;

                  // read byte by byte until end of stream

                  while ((i = bis.read()) != -1) {

                        bos.write(i);

                  }

                  JOptionPane.showMessageDialog(null, fileName + " is uploaded",

                              "Press OK", JOptionPane.INFORMATION_MESSAGE);

            } catch (Exception e) {

                  e.printStackTrace();

            } finally {

                  if (bis != null)

                        try {

                              bis.close();

                        } catch (IOException ioe) {

                              ioe.printStackTrace();

                              System.out.println("IO exception after if bis " + ioe);

                        }

                  if (bos != null)

                        try {

                              bos.close();

                        } catch (IOException ioe) {

                              ioe.printStackTrace();

                              System.out.println("IO exception after if " + ioe);

                        }

            }

      }

      public static void main(String args[]) {

            UploadIntoFTP uploadIntoftp = new UploadIntoFTP();

            uploadIntoftp.doUpload();

      }

}