读取XML

XML文件
<?xml version="1.0" encoding="gb2312"?>
<classRoom>
    <student>
        <name>王五</name>
        <age>19</age>
    </student>
    <student>
        <name>张三</name>
        <age>22</age>
    </student>
    <student>
        <name>李四</name>
        <age>33</age>
    </student>
</classRoom>

读取程序
package T20;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;
import java.io.File;
import java.io.IOException;

public class ReaderXML {

    /**
     * @param args
     */
    public static void main(String[] args) {

        try {
            DocumentBuilder db = DocumentBuilderFactory.newInstance()
                    .newDocumentBuilder();
            Document doc = db.parse(new File("MyXml.xml"));
            NodeList nl = doc.getElementsByTagName("classRoom");
            Element n = (Element) nl.item(0);
            // System.out.println(n.getElementsByTagName("Student").getLength());

            for (int i = 0; i < n.getElementsByTagName("student").getLength(); i++) {
                String name = n.getElementsByTagName("name").item(i)
                        .getFirstChild().getNodeValue();
                int age = Integer.parseInt(n.getElementsByTagName("age")
                        .item(i).getFirstChild().getNodeValue());
                System.out.println(name);
                System.out.println(age);
            }
        } catch (ParserConfigurationException e) {
            // TODO Auto-generated catch block
            System.out.println(e.getMessage());
        } catch (IOException e) {
            // TODO Auto-generated catch block
            System.out.println(e.getMessage());
        } catch (SAXException e) {
            System.out.println(e.getMessage());
        }

    }
}