XML DOM Parsing in Java PRO

JAXP (Java API for XML) provides us with the capability to parse XML documents using a DOM parser.

The following code sample shows a simple parsing using the JAXP DOM parser.

package com.abelski.samples;

import java.io.IOException;
import java.net.URL;
import java.io.InputStream;
import java.net.HttpURLConnection;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

public class Sample
{
    public static void main(String args[])
    {
        InputStream is = null;
        HttpURLConnection con = null;
        try
        {
            URL url = new URL("https://api.twitter.com/1/statuses/user_timeline.xml?screen_name=lifemichael");
            con = (HttpURLConnection)url.openConnection();
            con.setRequestMethod("GET");
            con.connect();
            is = con.getInputStream();
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            DocumentBuilder builder = factory.newDocumentBuilder();
            Document doc = builder.parse(is);
            NodeList list = doc.getElementsByTagName("text");
            int length = list.getLength();
            for(int i=0; i<length; i++)
            {
                System.out.println("\n\n"+
                    list.item(i).getFirstChild().getNodeValue());;
            }
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }
        catch(ParserConfigurationException e)
        {
            e.printStackTrace();
        }
        catch(SAXException e)
        {
            e.printStackTrace();
        }
        finally
        {
          if(is!=null)
          {
              try
              {
                  is.close();
              }
              catch(IOException e)
              {
                  e.printStackTrace();
              }
          }
          if(con!=null)
          {
              con.disconnect();
          }
        }
    }
}

The following video clip provides more explanation while overviewing the code sample and showing its execution.