How to read XML file in Java using DOM Parser

Here’s an example to demonstrate how to read a XML file in Java with DOM parser. The DOM interface is the easiest to understand. It parses an entire XML document and load it into memory, modeling it with Object for the traversal.

Step 1:Create a XML File

<?xml version="1.0"?>

<company>

    <Employee>

        <firstname>yong</firstname>

        <lastname>mook kim</lastname>

        <nickname>mkyong</nickname>

        <salary>100000</salary>

    </Employee>

    <Employee>

        <firstname>low</firstname>

        <lastname>yin fong</lastname>

        <nickname>fong fong</nickname>

        <salary>200000</salary>

    </Employee>

</company>

2.Create a Java File to Process this XML file

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 ReadXMLFile {

 public static void main(String argv[]) {

 try {

    File fXmlFile = new File("c:\\file.xml");
    DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
    Document doc = dBuilder.parse(fXmlFile);
    doc.getDocumentElement().normalize();

    System.out.println("Root element :" + doc.getDocumentElement().getNodeName());
    NodeList nList = doc.getElementsByTagName("Employee");
    System.out.println("-----------------------");

    for (int temp = 0; temp < nList.getLength(); temp++) {

       Node nNode = nList.item(temp);      
       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));
          System.out.println("Salary : "  + getTagValue("salary",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();   
 }

}