To create XML file in Java,here we are using DOM parser. By using the below code you can easily create XML file.

Write the below Java class to create a XML file:

CreateXMLFile.java

package com.babita;

import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

public class CreateXMLFile {

    public static void main(String args[]) {

      try {

        DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder docBuilder = docFactory.newDocumentBuilder();

        // root elements
        Document doc = docBuilder.newDocument();
        Element rootElement = doc.createElement("company");
        doc.appendChild(rootElement);

        // employee elements
        Element employee = doc.createElement("employee");
        rootElement.appendChild(employee);

        // set attribute to employee element
        Attr attr = doc.createAttribute("id");
        attr.setValue("1");
        employee.setAttributeNode(attr);

        // you can also use the below way toset attribute to employee element
        // employee.setAttribute("id", "1");

        // firstname elements
        Element firstname = doc.createElement("firstname");
        firstname.appendChild(doc.createTextNode("babita"));
        employee.appendChild(firstname);

        // lastname elements
        Element lastname = doc.createElement("lastname");
        lastname.appendChild(doc.createTextNode("dhami"));
        employee.appendChild(lastname);

        // emailId elements
        Element emailid = doc.createElement("emailid");
        emailid.appendChild(doc.createTextNode("babita.dhami@gmail.com"));
        employee.appendChild(emailid);

        // designation elements
        Element designation = doc.createElement("designation");
        designation.appendChild(doc.createTextNode("software engineer"));
        employee.appendChild(designation);

        // write the content into xml file
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        DOMSource source = new DOMSource(doc);
        StreamResult result = new StreamResult(new File("C:\\myDetail.xml"));

        // Output to console for testing, if you want see output on console
        // StreamResult result = new StreamResult(System.out);

        transformer.transform(source, result);

        System.out.println("XML file created!");

      } catch (ParserConfigurationException pce) {
        pce.printStackTrace();
      } catch (TransformerException tfe) {
        tfe.printStackTrace();
      }
    }
}

Output:

The following XML file named myDetail.xml will be created after running the above example.

<?xml version="1.0" encoding="UTF-8" standalone="no" ?> 
<company>
    <employee id="1">
        <firstname>babita</firstname>
        <lastname>dhami</lastname>
        <emailid>babita.dhami@gmail.com</emailid>
        <designation>software engineer</designation>
    </employee>
</company>

Hope this will help you :)