dom 打印出xml中元素节点

public void printXml() throws Exception{

//打印xml文档中所有的标签名

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

DocumentBuilder builder = factory.newDocumentBuilder();

Document document = builder.parse("src/xxx.xml ");

//得到根节点

Node root = document.getElementsByTagName("roodName").item(0);

NodeList list = root.getChildNodes();

for(int i=0;i<list.getLength();i++){

if(list.item(i) instanceof Element){ //判断子节点是不是元素节点

System.out.println(list.item(i).getNodeName());//打印出元素节点名称

}

}

}