class FileUpload
{
   /**
    * Upload a file to a FTP server. A FTP URL is generated with the
    * following syntax:
    * ftp://user:password@host:port/filePath;type=i.
    * 
    * @param ftpServer , FTP server address (optional port ':portNumber').
    * @param user , Optional user name to login.
    * @param password , Optional password for user.
    * @param fileName , Destination file name on FTP server (with optional
    *            preceding relative path, e.g. "myDir/myFile.txt").
    * @param source , Source file to upload.
    * @throws MalformedURLException, IOException on error.
    */
   public void upload( String ftpServer, String user, String password, String fileName, File source ) 
         throws MalformedURLException,
         IOException
   {
      if (ftpServer != null && fileName != null && source != null)
      {
         StringBuffer sb = new StringBuffer( "ftp://" );
         // check for authentication else assume its anonymous access.
         if (user != null && password != null)
         {
            sb.append( user );
            sb.append( ':' );
            sb.append( password );
            sb.append( '@' );
         }
         sb.append( ftpServer );
         sb.append( '/' );
         sb.append( fileName );
         /*
          * type ==> a=ASCII mode, i=image (binary) mode, d= file directory
          * listing
          */
         sb.append( ";type=a" );
          System.out.println(sb);
         BufferedInputStream bis = null;
         BufferedOutputStream bos = null;
         try
         {
            URL url = new URL( sb.toString() );
            URLConnection urlc = url.openConnection();
            bos = new BufferedOutputStream( urlc.getOutputStream() );
            bis = new BufferedInputStream( new FileInputStream( source ) );
            int i;
            // read byte by byte until end of stream
            while ((i = bis.read()) != -1)
            {
               bos.write( i );
            }
         }
         finally
         {
            if (bis != null)
            {
                 try
                 {
                     bis.close();
                 }
                 catch (IOException e)
                 {
                    bis = null;
                 }
            }        
            if (bos != null)
            {
                 try
                 {
                     bos.close();
                 }
                 catch (IOException e)
                 {
                    bos = null;
                 }    
            }
         }
      }
      else
      {
         System.out.println( "Input not available." );
      }
   }
}