IllegalStateException when piping XSLT result into getOutputStream()

[Justin Chu]

As subject

DOMSource     domSrc       = new DOMSource(xmlDom);
StreamResult  result       = new StreamResult([B]res.getOutputStream()[/B]);
Transformer   transformer  = templatesStore.getTransformer(stylePath);
transformer.transform(domSrc, result);

Is it because UTF-8 format cannot be printed into a servlet response's output stream?
I used getWriter() instead of getOutputStream(), and it works.
[ December 10, 2002: Message edited by: Chu Tan ]