Code:
File xmlFile = new File(”H:\\TEMP\\rooster-sal.xml”);
File xsltFile = new File(”H:\\NetBeansProjects\\Roosterdiensten\\src\\nl\\prhc\\roosterdiensten\\resources\\normalize-excel-sheet.xslt”);

// JAXP reads data using the Source interface
Source xmlSource = new StreamSource(xmlFile);
Source xsltSource = new StreamSource(xsltFile);

// the factory pattern supports different XSLT processors
TransformerFactory transFact =
TransformerFactory.newInstance();
Transformer trans;
try {
trans = transFact.newTransformer(xsltSource);
trans.transform(xmlSource, new StreamResult(new File(”H:\\TEMP\\rooster-sal-out.xml”)));
} catch (TransformerException ex) {
Logger.getLogger(RoosterdienstenView.class.getName()).log(Level.SEVERE, null, ex);
}

}