public static Map<String, String> readStringXml(String xml) throws DocumentException {
        Document doc = DocumentHelper.parseText(xml);
        Element books = doc.getRootElement();
        System.out.println("rootNode:" + books.getName());
        Iterator Elements = books.elementIterator();
        Map<String, String> map = new HashMap<>();
        while (Elements.hasNext()) {
            Element user = (Element) Elements.next();
            System.out.println("node=" + user.getName() + "\ttext=" + user.getText());
            map.put(user.getName(), user.getText());
        }
        return map;
    }