中文XML论坛--关于子节点的问题[求助]

贴子主题：关于子节点的问题[求助]

本主题类别:

文件domtree.java
import java.io.*;
import java.util.*;
import org.w3c.dom.*;
import javax.xml.parsers.*;
public class domtree extends Object
{
    public static void main(String args[ ])
    {
         DocumentBuilderFactory factory;
         DocumentBuilder docBuilder;
         Document doc;
         Element root;
         String name;

         try
         {
            factory=DocumentBuilderFactory.newInstance();
            factory.setValidating(false);
            docBuilder=factory.newDocumentBuilder();
            doc=docBuilder.parse(new FileInputStream(args[0]));
            root=doc.getDocumentElement();
            //System.out.println(root); //print the all xml content
            name=root.getNodeName();
            System.out.println(name);
            getChildren(root);
            }

         catch (Exception exp)
         {
            exp.printStackTrace();
            }
        }
     public static void getChildren(Element elem)
     {
      Node child;
      NodeList children;
         int i,Max;
         String elemName;

      children=elem.getChildNodes();
         Max=children.getLength();
         System.out.println(Max);
      //child=elem.getFirstChild();
         for (i=0;i<Max;i++)
         {
          child=children.item(i);
          elemName=child.getNodeName();
                         System.out.println(elemName);
          }
        }
}

文件 library.xml
<?xml version="1.0" encoding="GB2312"?>
<ns:library xmlns:ns="http://www.javaserverprogramming.com/library">
<book ISBN="12">
<title>Visual C++入门与精通</title>
<author country="China">VC工作室</author>
<press>清华大学出版社</press>
<price unit="RMB">45</price>
<copies>3</copies>
</book>
<book ISBN="34">
<title>Thinking in Java</title>
<author country="USA">Bruce Eckel</author>
<press>机械工业出版社</press>
<price unit="RMB">60</price>
<copies>10</copies>
</book>
</ns:library>

结果
ns:library
5
#text
book
#text
book
#text

根节点居然有五个子节点，请问这个根节点是怎么看的？
怎么会有三个Text型的节点？？？？


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