使用DOM处理XML NameSpace

book.xml

 

<? xml version="1.0" encoding="gb2312" ?>

< bks:books  xmlns:bks ="http://www.books.org/books" >
     < bks:book >
         < bks:title > java </ bks:title >
         < bks:author  xmlns ="http://www.books.org/people" >
             < name > j2ee </ name >
             < title > teacher </ title >
         </ bks:author >
     </ bks:book >
</ bks:books >

测试程序：

 

package  DomNS;

import  java.io.File;

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

import  org.w3c.dom.Document;
import  org.w3c.dom.NamedNodeMap;
import  org.w3c.dom.Node;

public   class  DomNSTest  ... {

    public static void printNSInfo(Node node)...{
         short type=node.getNodeType();
         switch(type)...{
         case Node.ELEMENT_NODE:
             if(node.getNamespaceURI()!=null)...{
                 System.out.println("Element Name:"+node.getNodeName());
                 System.out.println("Local Name:"+node.getLocalName());
                 System.out.println("Namespace Prefix:"+node.getPrefix());
                 System.out.println("Namespace Uri:"+node.getNamespaceURI());
                 System.out.println("---------------");
             }
             if(node.hasAttributes())...{
                 NamedNodeMap map=node.getAttributes();
                 int len=map.getLength();
                 for (int i = 0; i < len; i++) ...{
                    Node attr=map.item(i);
                    if(attr.getNamespaceURI()!=null)...{
                        printNSInfo(attr);
                    }
                }
             }
             Node child=node.getFirstChild();
             System.out.println(child);
             while(child!=null)
                ...{
                    printNSInfo(child);
                    child=child.getNextSibling();
                }
            
             break;
         case Node.ATTRIBUTE_NODE:
             System.out.println("Attribute Name:"+node.getNodeName());
             System.out.println("Local Name:"+node.getLocalName());
             System.out.println("Namespace Prefix:"+node.getPrefix());
             System.out.println("Namespace Uri:"+node.getNamespaceURI());
             System.out.println("---------------");
             break;
         default:
             break;
         }
    }
    public static void main(String[] args) ...{
         String realpath=System.getProperty("user.dir")+File.separator+"src"+File.separator+"DomNS"+File.separator+"book.xml";
        DocumentBuilderFactory factory=DocumentBuilderFactory.newInstance();
        factory.setNamespaceAware(true);//名称空间支持
        try ...{
            DocumentBuilder builder=factory.newDocumentBuilder();
            Document doc=builder.parse(new File(realpath));
            printNSInfo(doc.getDocumentElement());
        } catch (Exception e) ...{
            e.printStackTrace();
        }

    }

}

 运行结果：

Element Name:bks:books
Local Name:books
Namespace Prefix:bks
Namespace Uri:http://www.books.org/books
---------------
Attribute Name:xmlns:bks
Local Name:bks
Namespace Prefix:xmlns
Namespace Uri:http://www.w3.org/2000/xmlns/
---------------
[#text:
 ]
Element Name:bks:book
Local Name:book
Namespace Prefix:bks
Namespace Uri:http://www.books.org/books
---------------
[#text:
  ]
Element Name:bks:title
Local Name:title
Namespace Prefix:bks
Namespace Uri:http://www.books.org/books
---------------
[#text: java]
Element Name:bks:author
Local Name:author
Namespace Prefix:bks
Namespace Uri:http://www.books.org/books
---------------
Attribute Name:xmlns
Local Name:xmlns
Namespace Prefix:null
Namespace Uri:http://www.w3.org/2000/xmlns/
---------------
[#text:
   ]
Element Name:name
Local Name:name
Namespace Prefix:null
Namespace Uri:http://www.books.org/people
---------------
[#text: j2ee]
Element Name:title
Local Name:title
Namespace Prefix:null
Namespace Uri:http://www.books.org/people
---------------
[#text: teacher]