private String parseString2xml(String returnMsg) {
        String parseStr=null;

        try {
            Document doc= DocumentHelper.parseText(returnMsg);
            Element roots=doc.getRootElement();
            System.out.println("根节点 = [" + roots.getName() + "]");
            System.out.println("内容："+roots.getText());
            parseStr=roots.getText();
            /*//只有根节点……
            Iterator elements=roots.elementIterator();
            while (elements.hasNext()){
                Element child= (Element) elements.next();
                System.out.println("节点名称 = [" + child.getName() + "]"+"节点内容："+child.getText());
                List subElemets=child.elements();
               for(int i=0;i<subElemets.size();i++){
                   Element subChild= (Element) subElemets.get(i);
                   System.out.println("子节点名称："+subChild.getName()+"子节点内容："+subChild.getText());
               }

            }*/

        } catch (DocumentException e) {
            e.printStackTrace();
        }

        return parseStr;

    }