Spring 解析xml代码提取

public class Test {    public static void main(String[] args) throws Exception {        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();        factory.setNamespaceAware(true);        DocumentBuilder docBuilder = factory.newDocumentBuilder();        InputStream inputSource = new FileInputStream("D:\\spring-beans.xml");        Document document = docBuilder.parse(inputSource);        Element root = document.getDocumentElement();        NodeList nl = root.getChildNodes();        for (int i = 0 ;i< nl.getLength();i++) {            Node node = nl.item(i);            if (node instanceof Element) {                Element ele = (Element) node;                System.out.println("node NamespaceURI = " + ele.getNamespaceURI());            }        }        System.out.println(nl.getLength());    }}