Problem Statement:

Write a Java program to parse the XML document containing car details using SAX API.

Source Code:

ex5.xml

ex5.java

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 ReadXMLFile { 
   public static void main(String argv[]) { 
    try { 
	SAXParserFactory factory = SAXParserFactory.newInstance();
	SAXParser saxParser = factory.newSAXParser(); 
	DefaultHandler handler = new DefaultHandler() { 
	boolean bfname = false;
	boolean blname = false;
	boolean bnname = false;
	boolean bsalary = false; 
	public void startElement(String uri, String localName,String qName, 
                Attributes attributes) throws SAXException { 
		System.out.println("Start Element :" + qName); 
		if (qName.equalsIgnoreCase("company")) {
			bfname = true;
		} 
		if (qName.equalsIgnoreCase("model")) {
			blname = true;
		} 
		if (qName.equalsIgnoreCase("engine")) {
			bnname = true;
		} 
		if (qName.equalsIgnoreCase("mileage")) {
			bsalary = true;
		} 
	}
	
	public void endElement(String uri, String localName,
		String qName) throws SAXException { 
		System.out.println("End Element :" + qName); 
	}
 
	public void characters(char ch[], int start, int length) throws SAXException { 
		if (bfname) {
			System.out.println("Company Name : " + new String(ch, start, length));
			bfname = false;
		} 
		if (blname) {
			System.out.println("Model Name : " + new String(ch, start, length));
			blname = false;
		} 
		if (bnname) {
			System.out.println("Engine : " + new String(ch, start, length));
			bnname = false;
		} 
		if (bsalary) {
			System.out.println("Mileage : " + new String(ch, start, length));
			bsalary = false;
		} 
	} 
    };
 
	saxParser.parse("ex5.xml", handler);
 
    }
	catch (Exception e) 
	{
       e.printStackTrace();
    } 
   } 
}

Java file: ex5.java

Output:

Start Element :cars
Start Element :car
Start Element :company
Company Name : Maruthi
End Element :company
Start Element :model
Model Name : Swift
End Element :model
Start Element :engine
Engine : 1248cc
End Element :engine
Start Element :mileage
Mileage : 20
End Element :mileage
End Element :car
Start Element :car
Start Element :company
Company Name : Hyundai
End Element :company
Start Element :model
Model Name : i20
End Element :model
Start Element :engine
Engine : 1000cc
End Element :engine
Start Element :mileage
Mileage : 15
End Element :mileage
End Element :car
End Element :cars