try {
    String xslFile = DATA_DIR.resolve("XMLFile1.xml").toString();
    String xmlFile = DATA_DIR.resolve("XSLTFile1.xslt").toString();
    TransformerFactory factory = TransformerFactory.newInstance();
    Transformer transformer =
            factory.newTransformer(new StreamSource(xslFile));
    StreamSource xmlSource = new StreamSource(xmlFile);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    StreamResult output = new StreamResult(baos);
    transformer.transform(xmlSource, output);
    com.aspose.pdf.HtmlLoadOptions options = new com.aspose.pdf.HtmlLoadOptions();
    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
    com.aspose.pdf.Document pdfDocument = new com.aspose.pdf.Document(bais, options);
    pdfDocument.save(DATA_DIR.resolve("data_xml.pdf").toString());
} catch (Exception e) {
    System.out.println(e.getMessage());
}