//xml字符串转 document对象
Document document = XmlUtil.readXML(xmlData);
//根据路径获取Element对象
Element element = XmlUtil.getElementByXPath("//NInstanceData/ScatterData/Component", document);

//根据路径获取标签对象，返回的是数组
NodeList sectionList = element.getElementsByTagName("Section");
for (int i = 0; i < sectionList.getLength(); i++) {
	Node section = sectionList.item(i);
    //根据路径获取标签后获取标签的DisplayName属性
	String title = XmlUtil.getElementByXPath("Code", section).getAttribute("DisplayName");
    //根据路径获取标签后获取标签的内容
	String value = XmlUtil.getByXPath("Text", section, XPathConstants.STRING);
}