Dom操作一

@Test
    public void test() throws Exception{
        DocumentBuilderFactory fac = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = fac.newDocumentBuilder();
        Document document = db.parse("src/1.xml");
        NodeList nl = document.getElementsByTagName("aaa");
        Node node = nl.item(0);
        System.out.println(node.getChildNodes().getLength());
    }