Last minute,we go

genetate:
Document document = DocumentHelper.createDocument();        Element rootElement = document.addElement("contactdata-migration-request");        //rootElement.addAttribute("id", String.valueOf(requestId));        Element emailElement = rootElement.addElement("email");        emailElement.setText(email);        String str = document.asXML();
parse:
SAXReader saxReader = new SAXReader();            Document document;            StringReader strReader = new StringReader(contactXml);            document = saxReader.read(strReader);            Node responseIdNode = document.selectSingleNode("/contactdata-migration-response/@id");