SAXBuilder builder = new SAXBuilder(false);
InputStream xmlInput = new FileInputStream("xxx.xml");
Document doc = builder.build(xmlInput);
Element root = doc.getRootElement();


Element addDTSVersion = new Element("VersionA");
addDTSVersion.setText(configDTSVersion);     
Element addrallyVersion = new Element("VersionB");         
addrallyVersion.setText(configRallyVersion);

Element addTime = new Element("Maping");         
addTime.addContent(addDTSVersion);         
addTime.addContent(addrallyVersion);

root.addContent(addTime);

List<Element> Mapinglist = root.getChildren("Maping");

XMLOutputter outputter = new XMLOutputter();try {String locaFileName = ConfigUtils.class.getResource("/"+fileName).toString();locaFileName = locaFileName.substring(6);outputter.output(doc,new FileOutputStream(locaFileName));} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}