Read XML File using SAX Parser in JAVA

We have already discussed about the DOM Parser of JAXP. This article will focus on Reading XML file using SAX Parser:

SAXParser object can obtained from the SAXParserFactory and then we can process the document using that parser.
The most important interface in SAX parser class is ContentHandler. This interface requires a number of methods that the SAX parser invokes in response to various parsing events. The major event-handling methods are: startDocument, endDocument, startElement, and endElement.
The easiest way to implement this interface is to extend the DefaultHandler class, defined in the org.xml.sax.helpers package. That class provides do-nothing methods for all the ContentHandler events.

The example program extends that class.
public class SAXLocalNameCount extends DefaultHandler {

Example :

Locator to indicate the current position of SAX Parser.

package com.G2.SAX;

import java.io.IOException;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

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

public class XMlParserLocator extends DefaultHandler {
	Locator locator;

	@Override
	public void startElement(String uri, String localName, String tagName, Attributes arg3) throws SAXException {
		String locationString = "";
		if (locator != null) {
			locationString += locator.getSystemId();
			locationString += "Line : " + locator.getLineNumber();
			locationString += "Column : " + locator.getColumnNumber();
			System.out.println(locationString);

		}
	}

	public static void main(String[] args) {

		try {
			SAXParserFactory saxFactory = SAXParserFactory.newInstance();
			SAXParser parser = saxFactory.newSAXParser();
			parser.parse("ShivaSoft.xml", new XMlParserLocator());

		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	@Override
	public void setDocumentLocator(Locator arg0) {
		locator = arg0;
		System.out.println("setDocumentLocator() Called");
	}

}