Jaxb: Utility class to convert object to xml and xml to an object

I am using below jaxb library.

<dependency>

    <groupId>javax.xml.bind</groupId>

    <artifactId>jaxb-api</artifactId>

    <version>2.3.1</version>

</dependency>

Below snippet converts an object to xml string.

public static String marshal(Class<?> clazz, Object obj) throws JAXBException {
    JAXBContext contextObj = JAXBContext.newInstance(clazz);

    Marshaller marshallerObj = contextObj.createMarshaller();
    marshallerObj.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    marshallerObj.marshal(obj, bos);

    return new String(bos.toByteArray());
}

Below snippet converts xml string to java object.

@SuppressWarnings("unchecked")
public static <T> T unmarshal(Class<T> clazz, String data) throws JAXBException {
    JAXBContext contextObj = JAXBContext.newInstance(clazz);

    InputStream in = new ByteArrayInputStream(data.getBytes());
    Unmarshaller unmarshaller = contextObj.createUnmarshaller();

    return (T) unmarshaller.unmarshal(in);
}

Find the utiltity class.

JaxbUtil.java    

package com.sample.app.util;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

public class JaxbUtil {

    public static String marshal(Class<?> clazz, Object obj) throws JAXBException {
        JAXBContext contextObj = JAXBContext.newInstance(clazz);

        Marshaller marshallerObj = contextObj.createMarshaller();
        marshallerObj.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        marshallerObj.marshal(obj, bos);

        return new String(bos.toByteArray());
    }

    @SuppressWarnings("unchecked")
    public static <T> T unmarshal(Class<T> clazz, String data) throws JAXBException {
        JAXBContext contextObj = JAXBContext.newInstance(clazz);

        InputStream in = new ByteArrayInputStream(data.getBytes());
        Unmarshaller unmarshaller = contextObj.createUnmarshaller();

        return (T) unmarshaller.unmarshal(in);
    }
}

Employee.java

package com.sample.app.model;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "employee")
public class Employee {
    private int id;
    private String firstName;
    private String lastName;
    private Address address;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("Employee [id=").append(id).append(", firstName=").append(firstName).append(", lastName=")
                .append(lastName).append(", address=").append(address).append("]");
        return builder.toString();
    }

}

App.java

package com.sample.app;

import javax.xml.bind.JAXBException;

import com.sample.app.model.Address;
import com.sample.app.model.Employee;
import com.sample.app.util.JaxbUtil;

public class App {
    public static void main(String args[]) throws JAXBException {
        Employee emp = new Employee();
        emp.setId(1);
        emp.setFirstName("krishna");
        emp.setLastName("Majety");

        Address addr = new Address();
        addr.setCity("Chirala");
        addr.setCountry("India");
        addr.setState("Andhra Pradesh");
        emp.setAddress(addr);

        
        String serialized = JaxbUtil.marshal(Employee.class, emp);
        Employee emp1 = JaxbUtil.unmarshal(Employee.class, serialized);
        
        System.out.println(serialized);
        System.out.println(emp1);
    }
}

Run App.java, you can see below messages in console.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<employee>
    <address>
        <city>Chirala</city>
        <country>India</country>
        <state>Andhra Pradesh</state>
    </address>
    <firstName>krishna</firstName>
    <id>1</id>
    <lastName>Majety</lastName>
</employee>

Employee [id=1, firstName=krishna, lastName=Majety, address=Address [city=Chirala, state=Andhra Pradesh, country=India]]

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