File Fetching from file directory rather than HTTP URL

Question

Previously, my code was developed to fetch the file content from the HTTP URL like "http://storage.googleapis.com/abc". But, requirement just slightly has got changed now and demands that instead of using HTTP URL link, it should need to use file directory location of the server. (i.e., /var/puru/abc).

So, is there any proper or significant way to do and fulfill the requirement without much-doing changes to my existing code drastically?

I have provided the code sample here, which provide the file URL(baseUrl) that is using http URL actually.

private URL getFileUrl(String fileName) throws MalformedURLException {

        try {
            Date dateObj = dateFormatter.parse(date);
            Calendar cal = Calendar.getInstance();
            cal.setTime(dateObj);
            return new URL(baseUrl, cal.get(Calendar.YEAR) + "/" + fileName);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

Please suggest, and guide me.