Reading XML file in java using DOM and SAX parser with example

If any one is getting problem while reading xml file in java, following example might help you a lot.
Reading XML file in JAVA using DOM and SAX parser with examples.

For all the java beginners, I am writing a example to read xml file in java using DOM parser and SAX parser.

Here is the xml file.

<company>
<staff>
<firstname>Tom</firstname>
<lastname>Cruse</lastname>
<nickname>TC</nickname>
</staff>
<staff>
<firstname>Jenny</firstname>
<lastname>Frank</lastname>
<nickname>Jen</nickname>
</staff>
</company>

Reading above xml file in java using DOM parser with example.

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;
import org.w3c.dom.Element;
import java.io.File;

public class ReadXMLFileUsingDOMParser 
{
public static void main(String argv[]) 
{
try 
{
File fXmlFileName = new File("c:\\xmlFileName.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fXmlFileName);
doc.getDocumentElement().normalize();

System.out.println("Print Root Element :" + doc.getDocumentElement().getNodeName());
NodeList nList = doc.getElementsByTagName("staff");
System.out.println("+++++++++++++++++++");

for (int a = 0; a < nList.getLength(); a++)
{
Node nNode = nList.item(a);     
if (nNode.getNodeType() == Node.ELEMENT_NODE)
{
Element eElement = (Element) nNode;

System.out.println("First Name : "  + getTagValue("firstname",eElement));
System.out.println("Last Name : "  + getTagValue("lastname",eElement));
System.out.println("Nick Name : "  + getTagValue("nickname",eElement)); 
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
private static String getTagValue(String sTag, Element eElement)
{
NodeList nlList= eElement.getElementsByTagName(sTag).item(0).getChildNodes();
Node nValue = (Node) nlList.item(0); 

return nValue.getNodeValue();    
}
}

OutPut:
Print Root Element :company
+++++++++++++++++++
First Name : Tom
Last Name : Cruse
Nick Name : TC
First Name : Jenny
Last Name : Frank
Nick Name : Jen



Reading above xml java file in java using SAX parser with example.

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 ReadXMLFileUsingSAXParser 
{
public static void main(String args[]) 
{
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("FIRSTNAME"))
{
bfname = true;
}
if (qName.equalsIgnoreCase("LASTNAME"))
{
blname = true;
}
if (qName.equalsIgnoreCase("NICKNAME"))
{
bnname = 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("First Name : "+ new String(ch, start, length));
bfname = false;
}
if (blname)
{
System.out.println("Last Name : "+ new String(ch, start, length));
blname = false;
}
if (bnname)
{
System.out.println("Nick Name : "+ new String(ch, start, length));
bnname = false;
}
}
};
saxParser.parse("c:\\xmlFileName.xml", handler);
}
catch (Exception e)
{
e.printStackTrace();
}
}
}

OutPut:
Start Element :company
Start Element :staff
Start Element :firstname
First Name : Tom
End Element :firstname
Start Element :lastname
Last Name : Cruse
End Element :lastname
Start Element :nickname
Nick Name : TC
End Element :nickname
End Element :staff
Start Element :staff
Start Element :firstname
First Name : Jenny
End Element :firstname
Start Element :lastname
Last Name : Frank
End Element :lastname
Start Element :nickname
Nick Name : Jen
End Element :nickname
End Element :staff
End Element :company