Java HTML/XML - 如何讀入一個XML文件

import java.io.File;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {

  public static void main(String argv[]) throws Exception {
    File fXmlFile = new File("data.xml");
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document doc = dBuilder.parse(fXmlFile);

    doc.getDocumentElement().normalize();
    System.out.println("Root element :"
        + doc.getDocumentElement().getNodeName());

    NodeList nList = doc.getElementsByTagName("staff");
    for (int temp = 0; temp < nList.getLength(); temp++) {
      Node nNode = nList.item(temp);
      System.out.println("\nCurrent Element :" + nNode.getNodeName());
      if (nNode.getNodeType() == Node.ELEMENT_NODE) {
        Element eElement = (Element) nNode;
        System.out.println("Staff id : " + eElement.getAttribute("id"));
        System.out.println("First Name : "
            + eElement.getElementsByTagName("firstname").item(0)
                .getTextContent());
        System.out.println("Last Name : "
            + eElement.getElementsByTagName("lastname").item(0)
                .getTextContent());
        System.out.println("Nick Name : "
            + eElement.getElementsByTagName("nickname").item(0)
                .getTextContent());
        System.out.println("Salary : "
            + eElement.getElementsByTagName("salary").item(0).getTextContent());
      }
    }
  }
}