Saving DOMSource object created into a folder in SFTP Server in Java

I need to save the newly created DOMSource object as new XML file into a folder inside the SFTP server (not transferring a file from local computer into SFTP).

Here is the code

public void save(String xmlFilePath, Document document) {

    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    transformerFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
    transformerFactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, "");
    Transformer transformer;
    try {
        transformer = transformerFactory.newTransformer();
        DOMSource domSource = new DOMSource(document);
        StreamResult streamResult = new StreamResult(new File(xmlFilePath));
        transformer.transform(domSource,streamResult);

    } catch (TransformerException | NullPointerException e) {
        e.printStackTrace();
    }
}