Is there a standard/good way of converting between urls and windows filenames, in Java?
I am trying to download files, but I want the windows filename to be convertible back to the original filename. Note that the query portion of the url is vital, as I will be downloading different pages that differ only in query.
My current hacky solution is to replace illegal characters (such as '?') with a specific string (such as 'QQ'), but this makes conversion back to url less transparent. Is there a better way?
You could do worse than use URLEncoder to encode the URL:
String url = "http://18.104.22.168:80/foo/bar/baz.txt?black=white"; String filename = URLEncoder.encode(url, "UTF-8"); File file = new File(filename);
The filename becomes the legal win32 name:
This is a reversible operation:
String original = URLDecoder.decode(filename, "UTF-8");