public   static  String writeXmlString(Document doc) {
         try  {
            // Prepare the output file
            StringWriter  dos =  new  StringWriter();
            Result result =  new  StreamResult(dos);

            // Write the DOM document to the file
            Transformer xformer = TransformerFactory.newInstance().newTransformer();
            xformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
            xformer.transform( new  DOMSource(doc), result);

             return  dos.getBuffer().toString();
        }  catch  (TransformerConfigurationException e) {

        }  catch  (TransformerException e) {

        }
         return   null ;
    }