class FileUtils {

    public static String getDownloadFilename(String filename) {
        String fileName = String.format("%s/download/%s/%s", DATA_BASEDIR, DateUtils.getCurrentTime(YYYYMMDDHHMMSS), filename);

        File file = new File(fileName);
        if (!file.getParentFile().exists()) {
            file.getParentFile().mkdirs();
        }

        return fileName;
    }

    private  FileUtils();

}