Now we just need to use it.

Handling a posting of an XML document:

<%
Transformer xslt = loadTransformer();

xslt.transform(new StreamSource(request.getInputStream()),new StreamResult(out));

%>

Transforming the document specified by a query string:

<%
Transformer xslt = loadTransformer();

xslt.transform(new StreamSource(request.getQueryString()),new StreamResult(out));

%>