**1. 解析XML文档**
```xml
<students>
<student order="001" id="zhangsan">
<name>张三</name>
<age>25</age>
张三，你好！
</student>
<student order="002">
<name>李四</name>
<age>28</age>
李四，你好！
</student>
</students>
```
```java
@Test
public void read() throws ParserConfigurationException, IOException, SAXException {
String xmlFile = this.getClass().getResource("/student.xml").getPath();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
File file = new File(xmlFile);
//xml文档
Document document = builder.parse(file);
//所有的student节点
NodeList nodeList = document.getElementsByTagName("student");
Node node = nodeList.item(0);
//节点名称：student
System.out.println("节点名称：" + node.getNodeName());
//节点类型定义在接口Node中，如Node.ELEMENT_NODE
//节点类型：1
System.out.println("节点类型：" + node.getNodeType());
Element element = (Element) node;
//元素名：student
System.out.println("元素名：" + element.getTagName());
//order属性值：001
System.out.println("order属性值：" + element.getAttribute("order"));
//元素内的文本：
// 张三
// 25
// 张三，你好！
System.out.println("元素内的文本：" + element.getTextContent());
}
```
<br/>
**2. 将XML文档存入另一个新的文档**
```java
@Test
public void transform() throws ParserConfigurationException, IOException, SAXException, TransformerException {
String xmlFile = this.getClass().getResource("/student.xml").getPath();
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
File file = new File(xmlFile);
//xml文档
Document document = builder.parse(file);
TransformerFactory tranFactory = TransformerFactory.newInstance();
Transformer transformer = tranFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
Source xmlSource = new DOMSource(document);
Result result = new StreamResult("e:/student2.xml");
transformer.transform(xmlSource, result);
}
```
