java读取xml

import java.io.*;
import org.w3c.dom.*;
import org.xml.sax.SAXException;
import javax.xml.parsers.*;
public class Xml
{
    public static void main(String[] args)
    {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        try
        {
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document doc = builder.parse(new File("E://work//test//xml1.xml"));
            NodeList nl = doc.getElementsByTagName("book");
            for(int i = 0; i < nl.getLength(); i++)
            {
                System.out.println(nl.item(i).getAttributes().item(0));
                System.out.println(doc.getElementsByTagName("title").item(i).getFirstChild().getNodeValue());
                System.out.println(doc.getElementsByTagName("title").item(i).getAttributes().item(0));
                System.out.println(doc.getElementsByTagName("author").item(i).getFirstChild().getNodeValue());
                System.out.println(doc.getElementsByTagName("year").item(i).getFirstChild().getNodeValue());
                System.out.println(doc.getElementsByTagName("price").item(i).getFirstChild().getNodeValue());
                System.out.println();
            }
        }
        catch(ParserConfigurationException e)
        {
            e.printStackTrace();
        }
        catch(SAXException e)
        {
            e.printStackTrace();
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }
    }
} 

 xml:

<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">Learning XML</title>
        <author>Erik T. Ray</author>
        <year>2003</year>
        <price>39.95</price>
    </book>
</bookstore> 

Result:

category="COOKING"
Everyday Italian
lang="en"
Giada De Laurentiis
2005
30.00

category="CHILDREN"
Harry Potter
lang="en"
J K. Rowling
2005
29.99

category="WEB"
Learning XML
lang="en"
Erik T. Ray
2003
39.95