XML文件解析之DOM解析

private String domParseXml() {
		String str = null;
		List<Student> students = new ArrayList<Student>();

		DocumentBuilderFactory factory = null;
		DocumentBuilder builder = null;
		Document document = null;
		InputStream is = null;

		// 1.创建DocumentBuilderFactory实例
		factory = DocumentBuilderFactory.newInstance();

		try {
			// 2.利用DocumentBuilderFactory实例创建DocumentBuilder实例
			builder = factory.newDocumentBuilder();

			try {
				// 3.加载xml文件到输入流
				is = getResources().getAssets().open("dom_info.xml");
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

			try {
				// 4.解析xml文档并放在Document对象中
				document = builder.parse(is);
			} catch (SAXException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			// 5.得到根元素
			Element root = document.getDocumentElement();
            // 6.获得student节点，并保存在列表中
			NodeList nodes = root.getElementsByTagName("student");

			Student student = null;

			for (int i = 0; i < nodes.getLength(); i++) {
				student = new Student();
				Element studentElement = (Element) (nodes.item(i));
				student.setId(studentElement.getAttribute("id"));
				Element studentNameElement = (Element) studentElement
						.getElementsByTagName("name").item(0);
				Element studentGenderElement = (Element) studentElement
						.getElementsByTagName("gender").item(0);
				Element studentAgeElement = (Element) studentElement
						.getElementsByTagName("age").item(0);
				student.setName(studentNameElement.getFirstChild()
						.getNodeValue());
				student.setGender(studentGenderElement.getFirstChild()
						.getNodeValue());
				student.setAge(studentAgeElement.getFirstChild().getNodeValue());
				str = str + student.toString();
				students.add(student);
			}

		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return str;

	}

<?xml version="1.0" encoding="utf-8"?>
	<students>
		<student id="0">
			<name>zhangmq</name>
			<gender>female</gender>
			<age>24</age>
		</student>
		<student id="1">
			<name>zhouhy</name>
			<gender>male</gender>
			<age>24</age>
		</student>
	</students>