Saving an Xml File in server

[Sonara Rahul]

Hello Sir,
I have a problem of how to wrote a in xml file thats is in the server.
FileOutputStream output = new FileOutputStream(E://sample.xml");
OutputFormat format = new OutputFormat(document);
XMLSerializer serializer = new XMLSerializer(output, format);
serializer.serialize(root);
output.flush();
output.close();
This is how i write into file in the local ,But i need to write an xml file placed in the server.I have to specify the xml file to be written as "http://sample.xml".(url).
How could i do this.
pl.. help me.
with regards,
Sonara.