Serialize and DeSerialize Attributes of Object in JAXB

Entities Class

Create new package named entities. In this package, create new java class named Student.java as below:

Student Entity

package entities;

import java.io.Serializable;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlValue;

@XmlRootElement(name = "student")
public class Student implements Serializable {

	private String id;
	private String name;
	private int age;
	private double score;
	private DoB doB;
	private Phone phone;

	public String getId() {
		return id;
	}

	@XmlElement(name = "id")
	public void setId(String id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	@XmlElement(name = "name")
	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	@XmlElement(name = "age")
	public void setAge(int age) {
		this.age = age;
	}

	public double getScore() {
		return score;
	}

	@XmlElement(name = "score")
	public void setScore(double score) {
		this.score = score;
	}

	public DoB getDoB() {
		return doB;
	}

	@XmlElement(name = "dob")
	public void setDoB(DoB doB) {
		this.doB = doB;
	}

	public Phone getPhone() {
		return phone;
	}

	@XmlElement(name = "phone")
	public void setPhone(Phone phone) {
		this.phone = phone;
	}

	/* Declare phone tag */
	@XmlRootElement(name = "phone")
	public static class Phone implements Serializable {

		private String value;
		private String format;

		public String getValue() {
			return value;
		}

		@XmlValue
		public void setValue(String value) {
			this.value = value;
		}

		public String getFormat() {
			return format;
		}

		@XmlAttribute(name = "format")
		public void setFormat(String format) {
			this.format = format;
		}

		public Phone() {
		}

		public Phone(String value, String format) {
			this.value = value;
			this.format = format;
		}

	}

	/* Declare dob tag */
	@XmlRootElement(name = "dob")
	public static class DoB implements Serializable {

		private String value;
		private String format;
		private String place;

		public String getValue() {
			return value;
		}

		@XmlValue
		public void setValue(String value) {
			this.value = value;
		}

		public String getFormat() {
			return format;
		}

		@XmlAttribute(name = "format")
		public void setFormat(String format) {
			this.format = format;
		}

		public String getPlace() {
			return place;
		}

		@XmlAttribute(name = "place")
		public void setPlace(String place) {
			this.place = place;
		}

		public DoB() {
		}

		public DoB(String value, String format, String place) {
			this.value = value;
			this.format = format;
			this.place = place;
		}

	}

}

Run Application

Create new package, named demo. In this package, create new java class, named Main as below

package demo;

import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import entities.Student;

public class Main {

	private static void serialize(Student student, String xmlFile) {
		try {
			JAXBContext jaxbContext = JAXBContext.newInstance(Student.class);
			Marshaller marshaller = jaxbContext.createMarshaller();
			marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
			// Display result to console
			marshaller.marshal(student, System.out);
			// Save result to xml file
			marshaller.marshal(student, new File(xmlFile));
		} catch (Exception e) {
			System.err.println(e.getMessage());
		}
	}

	private static void deSerialize(String xmlFile) {
		try {
			JAXBContext jaxbContext = JAXBContext.newInstance(Student.class);
			Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
			Student student = (Student) unmarshaller.unmarshal(new File(xmlFile));
			System.out.println("Student Info");
			System.out.println("Id: " + student.getId());
			System.out.println("Name: " + student.getName());
			System.out.println("Age: " + student.getAge());
			System.out.println("Score: " + student.getScore());
			System.out.println("DoB: " + student.getDoB().getValue());
			System.out.println("\tFormat: " + student.getDoB().getFormat());
			System.out.println("\tPlace: " + student.getDoB().getPlace());
			System.out.println("Phone: " + student.getPhone().getValue());
			System.out.println("\tFormat: " + student.getPhone().getFormat());
		} catch (Exception e) {
			System.err.println(e.getMessage());
		}
	}

	public static void main(String[] args) {

		String xmlFile = "src\\data\\student.xml";
		Student student = new Student();
		student.setId("st01");
		student.setName("name 1");
		student.setAge(22);
		student.setScore(7.8);
		student.setDoB(new Student.DoB("1980-10-20", "yyyy-MM-dd", "New York"));
		student.setPhone(new Student.Phone("123456", "US Phone"));
		serialize(student, xmlFile);
		deSerialize(xmlFile);

	}

}

Output

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<student>
    <age>22</age>
    <dob format="yyyy-MM-dd" place="New York">1980-10-20</dob>
    <id>st01</id>
    <name>name 1</name>
    <phone format="US Phone">123456</phone>
    <score>7.8</score>
</student>

Student Info
Id: st01
Name: name 1
Age: 22
Score: 7.8
DoB: 1980-10-20
	Format: yyyy-MM-dd
	Place: New York
Phone: 123456
	Format: US Phone