Create XML File In Java – (DOM Parser)

DOM provides many handy classes to create XML file easily. Firstly, you have to create a Document withDocumentBuilder class, define all the XML content – node, attribute with Element class. In last, use Transformer class to output the entire XML content to stream output, typically a File.

In this tutorial, we show you how to use DOM XML parser to create a XML file.

DOM Parser Example

At the end of the example, following XML file named “file.xml” will be created.

<?xml version="1.0" encoding="UTF-8" standalone="no" ?> 
<company>
 <staff id="1">
  <firstname>yong</firstname>
  <lastname>mook kim</lastname>
  <nickname>mkyong</nickname>
  <salary>100000</salary>
 </staff>
</company>

File : WriteXMLFile.java – Java class to create a XML file.

package com.mkyong.core;
 
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 WriteXMLFile {
 
 public static void main(String argv[]) {
 
   try {
 
  DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
  DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
 
  // root elements
  Document doc = docBuilder.newDocument();
  Element rootElement = doc.createElement("company");
  doc.appendChild(rootElement);
 
  // staff elements
  Element staff = doc.createElement("Staff");
  rootElement.appendChild(staff);
 
  // set attribute to staff element
  Attr attr = doc.createAttribute("id");
  attr.setValue("1");
  staff.setAttributeNode(attr);
 
  // shorten way
  // staff.setAttribute("id", "1");
 
  // firstname elements
  Element firstname = doc.createElement("firstname");
  firstname.appendChild(doc.createTextNode("yong"));
  staff.appendChild(firstname);
 
  // lastname elements
  Element lastname = doc.createElement("lastname");
  lastname.appendChild(doc.createTextNode("mook kim"));
  staff.appendChild(lastname);
 
  // nickname elements
  Element nickname = doc.createElement("nickname");
  nickname.appendChild(doc.createTextNode("mkyong"));
  staff.appendChild(nickname);
 
  // salary elements
  Element salary = doc.createElement("salary");
  salary.appendChild(doc.createTextNode("100000"));
  staff.appendChild(salary);
 
  // 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:\\file.xml"));
 
  // Output to console for testing
  // StreamResult result = new StreamResult(System.out);
 
  transformer.transform(source, result);
 
  System.out.println("File saved!");
 
   } catch (ParserConfigurationException pce) {
  pce.printStackTrace();
   } catch (TransformerException tfe) {
  tfe.printStackTrace();
   }
 }
}

A new XML file is created in “C:\\file.xml“, with default UTF-8 encoded.

Note
For debugging, you can change the StreamResult to output the XML content to your console.

StreamResult result =  new StreamResult(System.out);
transformer.transform(source, result);

from : http://www.mkyong.com/