Java通过DOM解析XML

package com.gcli.xml;

import java.io.IOException;

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

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class XMLDOMTest {

    public static void main(String[] args) {
        // (1)建立DocumentBuilderfactory ，用于取得DocumentBuilder
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        // (2)通过DocumentBuilderfactory取得DocumentBuilder
        DocumentBuilder builder = null;
        try {
            builder = factory.newDocumentBuilder();
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        }
        // (3)定义Document接口对象，通过DocumenBuilder类进行DOM树转换操作
        Document doc = null;
        try {
            doc = builder.parse("C:\\javatest\\bookstore.xml");
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // (4)查找book的节点
        NodeList nl = doc.getElementsByTagName("book");
        // （5）遍历book节点，并输出内容
        for (int i = 0; i < nl.getLength(); i++) {
            Element element = (Element) nl.item(i);
            String category = element.getAttribute("category");
            String title = element.getElementsByTagName("title").item(0)
                    .getFirstChild().getNodeValue();
            String author = element.getElementsByTagName("author").item(0)
                    .getFirstChild().getNodeValue();
            String year = element.getElementsByTagName("year").item(0)
                    .getFirstChild().getNodeValue();
            String price = element.getElementsByTagName("price").item(0)
                    .getFirstChild().getNodeValue();
            System.out.println("第" + (i + 1) + "本书,类别：" + category + ",名字："
                    + title + ",作者：" + author + ",出版时间：" + year + ",价格："
                    + price + "。");
        }
    }

}

  <?xml version="1.0" encoding="ISO-8859-1" ?> 
- <bookstore>
- <book category="cooking">
  <title lang="en">Everyday Italian</title> 
  <author>Giada De Laurentiis</author> 
  <year>2005</year> 
  <price>30.00</price> 
  </book>
- <book category="children">
  <title lang="en">Harry Potter</title> 
  <author>J K. Rowling</author> 
  <year>2005</year> 
  <price>29.99</price> 
  </book>
- <book category="web">
  <title lang="en">XQuery Kick Start</title> 
  <author>James McGovern</author> 
  <author>Per Bothner</author> 
  <author>Kurt Cagle</author> 
  <author>James Linn</author> 
  <author>Vaidyanathan Nagarajan</author> 
  <year>2003</year> 
  <price>49.99</price> 
  </book>
- <book category="web" cover="paperback">
  <title lang="en">Learning XML</title> 
  <author>Erik T. Ray</author> 
  <year>2003</year> 
  <price>39.95</price> 
  </book>
  </bookstore>