import java.io.File;

import javax.swing.JFileChooser;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;


public class XMLReader extends DefaultHandler{

	private SAXParser parser;
	
	public XMLReader(File file) throws Exception{
		//create a parser
		SAXParserFactory factory = SAXParserFactory.newInstance();
		parser = factory.newSAXParser();
		parser.parse(file, this);
	}
	
	@Override
	public void startDocument() throws SAXException {
		super.startDocument();
		System.out.println("Start the document.");
	}
	
	@Override
	public void endDocument() throws SAXException {
		super.endDocument();
		System.out.println("End the document.");
	}
	
	@Override
	public void startElement(String uri, String localName, 
			String qName, Attributes attributes) throws SAXException {
		System.out.println(qName + " start");
		
		super.startElement(uri, localName, qName, attributes);
	}
	
	public void endElement(String uri, String localName, String qName) 
		throws SAXException {
		System.out.println(qName + " end");
		
		super.endElement(uri, localName, qName);
	}
	
	@Override
	public void characters(char[] ch, int start, int length)
			throws SAXException {
		// contents between tags
		String line = new String(ch);
		System.out.println(line);
		super.characters(ch, start, length);
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		JFileChooser chooser = new JFileChooser(".");

		int returnVal = chooser.showOpenDialog(null);
		
		if(returnVal == JFileChooser.APPROVE_OPTION){
			//the user hit "ok"
			
			//get the selected file
			File file = chooser.getSelectedFile();
			try {
				XMLReader reader = new XMLReader(file);
			}
			catch(Exception e){
				e.printStackTrace();
			}
		}

	}

}