StAX parser: The program prints all hyperlinks links of an XHTML web page : StAX « XML « Java

1. Java
2. XML
3. StAX

StAX parser: The program prints all hyperlinks links of an XHTML web page

  
 
/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import java.io.InputStream;
import java.net.URL;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamConstants;
import javax.xml.stream.XMLStreamReader;

/**
 * This program demonstrates how to use a StAX parser. The program prints all hyperlinks links of an
 * XHTML web page. <br>
 * Usage: java StAXTest url
 * @author Cay Horstmann
 * @version 1.0 2007-06-23
 */
public class StAXTest
{
   public static void main(String[] args) throws Exception
   {
      String urlString;
      if (args.length == 0)
      {
         urlString = "http://www.w3c.org";
         System.out.println("Using " + urlString);
      }
      else urlString = args[0];
      URL url = new URL(urlString);
      InputStream in = url.openStream();
      XMLInputFactory factory = XMLInputFactory.newInstance();
      XMLStreamReader parser = factory.createXMLStreamReader(in);
      while (parser.hasNext())
      {
         int event = parser.next();
         if (event == XMLStreamConstants.START_ELEMENT)
         {
            if (parser.getLocalName().equals("a")) 
            {
               String href = parser.getAttributeValue(null, "href");
               if (href != null)
                  System.out.println(href);               
            }
         }
      }
   }
}

   
    
  

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