用DOM将对象写入XML中

public class DOMWriteXML {
	
	public static void writeXML(List<Student> students){
		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
		try {
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document doc = builder.newDocument();
			
			//创建根节点
			Element root = doc.createElement("stus");
			
			for(Student stu : students){
				Element student = doc.createElement("student");
				
				Element name = doc.createElement("name");
				name.appendChild(doc.createTextNode(stu.getName()));
				
				Element age = doc.createElement("age");
				age.appendChild(doc.createTextNode(stu.getAge()+""));
				
				Element email = doc.createElement("email");
				email.appendChild(doc.createTextNode(stu.getEmail()));
				
				student.appendChild(name);
				student.appendChild(age);
				student.appendChild(email);
				
				root.appendChild(student);
			}
			
			doc.appendChild(root);
			
			//document --> xml文件
			TransformerFactory tf = TransformerFactory.newInstance();
			Transformer t = tf.newTransformer();
			//设置编码
			t.setOutputProperty("encoding", "UTF-8");
			
			DOMSource source = new DOMSource(doc);
			Result result = new StreamResult("stu.xml");
			t.transform(source, result);
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (TransformerConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (TransformerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		};
	}

	public static void main(String[] args) {
		List<Student> students = new ArrayList<>();
		students.add(new Student("marry", 25, "[email protected]"));
		students.add(new Student("john", 21, "[email protected]"));
		students.add(new Student("jack", 23, "[email protected]"));
		writeXML(students);

	}

}