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PravinChk on 04/07/10

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DOM Parser demo using DocumentBuilder.

/ Published in: Java

Code is to demonstrate the use of DocumentBuilder to parse the XML file. And retrieve the data from it.

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import java.io.File;
import java.io.IOException;
 
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
 
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
 
 
public class DocumentBuilderDemo {
 
 
	public static void main(String[] args) throws ParserConfigurationException, SAXException, IOException {
		DocumentBuilder db = null;
		DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
		db = dbf.newDocumentBuilder();
		Document doc = db.parse(new File("c:\\simple.xml"));
 
		Element root = doc.getDocumentElement();
		System.out.println(root.getNodeName());
 
		System.out.println("========================================================================");
 
		NodeList nodeList = root.getElementsByTagName("to");
 
		for (int i = 0; i < nodeList.getLength(); i++) {
			Node node = nodeList.item(i).getFirstChild();
			System.out.println(node.getNodeValue());
		}
 
		System.out.println("========================================================================");
 
		nodeList = root.getElementsByTagName("from");
 
		for (int i = 0; i < nodeList.getLength(); i++) {
			Node node = nodeList.item(i).getFirstChild();
			System.out.println(node.getNodeValue());
		}
 
		System.out.println("========================================================================");
 
		nodeList = root.getElementsByTagName("body");
 
		for (int i = 0; i < nodeList.getLength(); i++) {
			Node node = nodeList.item(i).getFirstChild();
			System.out.println(node.getNodeValue());
		}
 
		System.out.println("========================================================================");
 
 
	}
 
}
 
 
/*
The simple.xml file that we used for parsing in above example.
 
 
<?xml version="1.0"?>
<msg>
	<note>
		<to>Tom</to>
		<from>Prince</from>
		<heading>Reminder</heading>
		<body>Hello how are u?</body>
	</note>
	<note>
		<to>Sania</to>
		<from>Prince</from>
		<heading>Joking</heading>
		<body>Welcome!!!</body>
	</note>
</msg>
 
*/