解释ＸＭＬ。大侠们帮帮我

package com.lch.test;

import
import
import
import

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.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class XMLParse {

    public XMLParse(){
        DocumentBuilderFactory domfac = DocumentBuilderFactory.newInstance();
        try {
            DocumentBuilder dombulider = domfac.newDocumentBuilder();
            InputStream is = new FileInputStream("D:\\workspace6\\test\\src\\com\\lch\\test\\test.xml");
            Document doc = dombulider.parse(is);
            Element root = doc.getDocumentElement();
            NodeList books = root.getChildNodes();
            if(books != null){
                for(int i=0; i<books.getLength(); i++){
                    Node book = books.item(i);
                    if(book.getNodeType() == Node.ELEMENT_NODE){
                        for(Node node=book.getFirstChild(); node!=null; node=node.getNextSibling()){
                            if(node.getNodeType() == Node.ELEMENT_NODE){
                                if(node.getNodeName().equals("name")){
                                    String name1=node.getFirstChild().getNodeValue();
                                    System.out.println(name1);
                                }else if(node.getNodeName().equals("price")){
                                    String price=node.getFirstChild().getNodeValue();
                                    System.out.println(price);
                                }
                            }
                        }
                    }
                }
            }
        } catch (ParserConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SAXException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }
   
    public static void main(String[] args) {
        new XMLParse();
    }
}

====================================================================================
<?xml version="1.0" encoding="gb2312"?>
<books>
    <book>
        <name>我的书0</name>
        <price>45￥</price>
    </book>
    <book>
        <name>我的书1</name>
        <price>45￥</price>
    </book>
</books>
=======================================
输出结果
我的书0
45￥
我的书1
45￥
=======================================
我功力浅，你的XML文件在我看来定义有一些问题。
不嫌弃的话，你可以看看我帮你写的一个处理方法！