Convert Java Object to XML

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We will learn how to write information stored in Java objects fields into XML file or String.

Java Object to XML String Conversion:

import java.io.File; import java.io.StringWriter; import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBException; import javax.xml.bind.Marshaller; public class JaxbObjectToXmlString { public static void main(String[] args) { //Java object. We will convert it to XML. Employee employee = new Employee(1, "Rohit", "Sharma", new Department(100, "CS")); //Method which uses JAXB to convert object to XML jaxbObjectToXML(employee); } private static void jaxbObjectToXML(Employee employee) { try { //Create JAXB Context ( provides methods to unmarshal, marshal and validate operations) JAXBContext jaxbContext = JAXBContext.newInstance(Employee.class); //Create Marshaller ( provides marshal() method marshals Java object into XML) Marshaller jaxbMarshaller = jaxbContext.createMarshaller(); //For Formating jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); //For Printing XML String to Console StringWriter sw = new StringWriter(); //Write XML data to StringWriter jaxbMarshaller.marshal(employee, sw); //Verify the XML Content String xmlData = sw.toString(); System.out.println(xmlData); } catch (JAXBException e) { e.printStackTrace(); } } }

Output

<?xml version="1.0" encoding="UTF-8" standalone="yes"?> <employee> <department> <id>100</id> <name>CS</name> </department> <firstName>Rohit</firstName> <id>1</id> <lastName>Sharma</lastName> </employee>

Java Object to XML File Conversion:

import java.io.File; import java.io.StringWriter; import javax.xml.bind.JAXBContext; import javax.xml.bind.JAXBException; import javax.xml.bind.Marshaller; public class JaxbObjectToXmlFile { public static void main(String[] args) { //Java object. We will convert it to XML. Employee employee = new Employee(1, "Rohit", "Sharma", new Department(100, "CS")); //Method which uses JAXB to convert object to XML jaxbObjectToXML(employee); } private static void jaxbObjectToXML(Employee employee) { try { //Create JAXB Context ( provides methods to unmarshal, marshal and validate operations) JAXBContext jaxbContext = JAXBContext.newInstance(Employee.class); //Create Marshaller ( provides marshal() method marshals Java object into XML) Marshaller jaxbMarshaller = jaxbContext.createMarshaller(); //For Formating jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); //Store XML to File File f = new File("employee.xml"); //Write XML data to StringWriter jaxbMarshaller.marshal(employee, f); } catch (JAXBException e) { e.printStackTrace(); } } }