使用SAX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 >

测试代码：

 

package  saxNS;

import  java.io.File;
import  java.io.FileInputStream;
import  java.io.FileNotFoundException;
import  java.io.IOException;

import  org.xml.sax.Attributes;
import  org.xml.sax.InputSource;
import  org.xml.sax.SAXException;
import  org.xml.sax.XMLReader;
import  org.xml.sax.helpers.DefaultHandler;
import  org.xml.sax.helpers.XMLReaderFactory;

public   class  SaxNSTest  extends  DefaultHandler  ... {

    
    public void endPrefixMapping(String prefix) throws SAXException ...{
        System.out.println("Namespace prefix: "+prefix);
        System.out.println("Namespace ending...");
        

    }

    
    public void startElement(String uri, String localName, String name,
            Attributes attributes) throws SAXException ...{
        if(!uri.equals(""))...{
            System.out.println("Element name:"+name);
            System.out.println("Local name:"+localName);
            //查看名称空间前缀
            int index=name.indexOf(":");
            if(index>0)...{
                System.out.println("Namespace prefix:"+name.substring(0,index));
                
            }
            System.out.println("NameSpace uri:"+uri);
            System.out.println("---------------------");
        }
    
    }

    
    public void startPrefixMapping(String prefix, String uri)
            throws SAXException ...{
        System.out.println("Namespace starting...");
        System.out.println("Namespace prefix: "+prefix);
        System.out.println("Namespace uri: "+uri);
        
    }


    public static void main(String[] args) ...{
         String realpath=System.getProperty("user.dir")+File.separator+"src"+File.separator+"saxNS"+File.separator+"book.xml";    
         try ...{
             //XMLReader缺省对名称空间进行解析
            XMLReader reader=XMLReaderFactory.createXMLReader();
            reader.setContentHandler(new SaxNSTest());
            reader.parse(new InputSource(new FileInputStream(realpath)));
         } catch (SAXException e) ...{
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (FileNotFoundException e) ...{
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) ...{
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        }



}

 

结果：

Namespace starting...
Namespace prefix: bks
Namespace uri: http://www.books.org/books
Element name:bks:books
Local name:books
Namespace prefix:bks
NameSpace uri:http://www.books.org/books
---------------------
Element name:bks:book
Local name:book
Namespace prefix:bks
NameSpace uri:http://www.books.org/books
---------------------
Element name:bks:title
Local name:title
Namespace prefix:bks
NameSpace uri:http://www.books.org/books
---------------------
Namespace starting...
Namespace prefix:
Namespace uri: http://www.books.org/people
Element name:bks:author
Local name:author
Namespace prefix:bks
NameSpace uri:http://www.books.org/books
---------------------
Element name:name
Local name:name
NameSpace uri:http://www.books.org/people
---------------------
Element name:title
Local name:title
NameSpace uri:http://www.books.org/people
---------------------
Namespace prefix:
Namespace ending...
Namespace prefix: bks
Namespace ending...