response.setContentType("text/html;charset=utf-8"); TransformerFactory factory = TransformerFactory.newInstance(); Transformer transformer = factory.newTransformer(new StreamSource("../start.xsl")); System.out.println(request.getContextPath()); transformer.setParameter("theme-prefix", request.getRequestURI() + "/../"); transformer.transform(new StreamSource("foundry-documentation.xml"), new StreamResult(response.getOutputStream()));