Save XML to a relative file location.

Save XML to a relative file location.

I have a writeScore.class which is doing the following:
Get URL and than InputStream of a relative file score.xml
Start building new xml document by parsing through existing one
Append new record to the document builder
The last thing the program does should be to write the new document in a
place of the old one. Sadly I can't find any way to use the relative path
I already have. I've tried to use the use URLConnection and than
.getOutputStream, but I get the protocol doesn't support output error. I
also gave a try to OIUtils.copy(is, os) to convert InputStream into
OutputStream but although there are no errors, for some reason the file
doesn't change and the last modification date points to the last time I
did it with direct file address. (I did a system wide search in case new
file was created somewhere else, found nothing).
Here is simplified code using the URLConnection method:
public class writeScore {
public writeScore(Score NewScore, Interface obj) {
try {
// prepare file path
URL scoreUrl = new URL("file","localhost","save/score.xml");
InputStream is = scoreUrl.openStream();
final URLConnection scoreCon = scoreUrl.openConnection();
final OutputStream os = scoreCon.getOutputStream();
// build the document
DocumentBuilderFactory docFactory =
DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
Document doc = docBuilder.parse(is);
// root element
Element root = doc.getDocumentElement();
Element rootElement = doc.getDocumentElement();
// add new save
/* removed for code cleaning */
// save source
DOMSource source = new DOMSource(doc);
// set up the transformer
TransformerFactory transformerFactory =
TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
// add properties of the output file
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount",
"2");
// save the file
StreamResult result = new StreamResult(os);
transformer.transform(source, result);
} // and catch all the exceptions
}
}
If need be I'm happy to change the way I input the file as well, as long I
can have a relative path from Java/bin/game/writeScore.class to
Java/save/score.xml where 'Java' is my project directory. But also once
the game is package into a .jar and save is a folder outside of that jar.