code: public String successfulFileUpload(File file, Properties properties)
  	{
  		return "<p>Previous upload successful. Path: " + file.getPath() + " Filename: " + file.getName() + " received containing " + file.length() + " bytes</p>" + RETURN;
  	}
docs: /*
  The file was uploaded successfully, return an HTML string to display.
  NOTE: This is supplied to provide a convenient place to override this servlet and
  do some processing or supply a different (or no) return string.
  Usually, you want to call super to get the standard string.
  @param properties All the form parameters.
  @param file The file that was uploaded.
  @returns HTML String to display.