How to write a XML file in java.

Step 1- Create document

Step 2- Create root element

Step 3- Append root into document

Step 4- Create child element of root element


Step 5- Append it to root element

Step 6- Create child element

Step 7- Create node text

Step 8- Append it to parent element

Repeat this for next child element.

Example -
I’m going to create below xml file-

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<?xml version="1.0"?> <company> <staff id="1001"> <firstname>Ram</firstname> <lastname>Singh</lastname> <nickname>ram</nickname> <salary>100000</salary> </staff> <staff id="2001"> <firstname>Shyam</firstname> <lastname>Singh</lastname> <nickname>shyam</nickname> <salary>200000</salary> </staff> </company>

WriteXMLFile.java

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package com. atozjavatutorials; 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("Ram")); staff.appendChild(firstname); // lastname elements Element lastname = doc.createElement("lastname"); lastname.appendChild(doc.createTextNode("Singh")); staff.appendChild(lastname); // nickname elements Element nickname = doc.createElement("nickname"); nickname.appendChild(doc.createTextNode("ram")); 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("src\\myWriteXml.xml")); transformer.transform(source, result); System.out.println("File saved!"); } catch (ParserConfigurationException pce) { pce.printStackTrace(); } catch (TransformerException tfe) { tfe.printStackTrace(); } } }

Output file : 

myWriteXml.xml

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<?xml version="1.0"?> <company> <staff id="1001"> <firstname>Ram</firstname> <lastname>Singh</lastname> <nickname>ram</nickname> <salary>100000</salary> </staff> <staff id="2001"> <firstname>Shyam</firstname> <lastname>Singh</lastname> <nickname>shyam</nickname> <salary>200000</salary> </staff> </company>