JAXB with Spring ORM for marshaling tutorial

This extends Basic JAXB tutorial with Maven & XSD – 1 to marshall with Spring OXM and Spring XML.

Right mouse click on target/generated-sources and select “Build Path –> Use as Source Folder”

JAXB Spring Marshalling Example

Step 1: add spring-orm to use JAXB and spring-xml to use StringResult.

<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>3.2.13.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.ws</groupId>
            <artifactId>spring-xml</artifactId>
            <version>2.2.0.RELEASE</version>
        </dependency>
    </dependencies>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-oxm</artifactId>

<version>3.2.13.RELEASE</version>

</dependency>

<groupId>org.springframework.ws</groupId>

<artifactId>spring-xml</artifactId>

<version>2.2.0.RELEASE</version>

</dependency>

</dependencies>

Step 2: The App class with marshaling logic. It is marshaling the “PersonRequest” that was generated in the previous tutorial from an XSD file using the “maven-jaxb2-plugin”.

package com.jaxb.tutorial;

import java.io.IOException;

import javax.xml.bind.JAXBException;

import org.springframework.context.ApplicationContext;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.oxm.Marshaller;
import org.springframework.oxm.XmlMappingException;
import org.springframework.xml.transform.StringResult;

import com.myapp.schema.v1.dto.AddressDto;
import com.myapp.schema.v1.dto.PersonRequest;

public class App {

    private Marshaller marshaller;

    public static void main(String[] args) throws JAXBException, XmlMappingException, IOException {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
        App myApp = (App) ctx.getBean("springApp");
        myApp.process();
        ((ConfigurableApplicationContext)ctx).close();
    }

    public void process() throws XmlMappingException, IOException{
        PersonRequest req = new PersonRequest();
        req.setFirstName("Peter");
        req.setLastName("Smith");

        AddressDto address = new AddressDto();
        address.setStreet("Bora Street");
        address.setSuburb("Kensington");
        req.setAddress(address);

       StringResult result = new StringResult();
        marshaller.marshal(req, result);
        System.out.println(result.toString());
    }


    public Marshaller getMarshaller() {
        return marshaller;
    }


    public void setMarshaller(Marshaller marshaller) {
        this.marshaller = marshaller;
    }
}

package com.jaxb.tutorial;

import java.io.IOException;

import javax.xml.bind.JAXBException;

import org.springframework.context.ApplicationContext;

import org.springframework.context.ConfigurableApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.oxm.Marshaller;

import org.springframework.oxm.XmlMappingException;

import org.springframework.xml.transform.StringResult;

import com.myapp.schema.v1.dto.AddressDto;

import com.myapp.schema.v1.dto.PersonRequest;

public class App {

private Marshaller marshaller;

public static void main(String[] args) throws JAXBException, XmlMappingException, IOException {

ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");

App myApp = (App) ctx.getBean("springApp");

myApp.process();

((ConfigurableApplicationContext)ctx).close();

}

public void process() throws XmlMappingException, IOException{

PersonRequest req = new PersonRequest();

req.setFirstName("Peter");

req.setLastName("Smith");

AddressDto address = new AddressDto();

address.setStreet("Bora Street");

address.setSuburb("Kensington");

req.setAddress(address);

StringResult result = new StringResult();

marshaller.marshal(req, result);

System.out.println(result.toString());

}

public Marshaller getMarshaller() {

return marshaller;

}

public void setMarshaller(Marshaller marshaller) {

this.marshaller = marshaller;

}

Step 3: The Spring context class “applicationContext.xml”

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">

    <bean id="springApp" class="com.jaxb.tutorial.App" >
        <property name="marshaller" ref ="jaxb2Marshaller" />
    </bean>

    <bean id="jaxb2Marshaller"
          class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
        <property name="classesToBeBound">
            <list>
                <value>com.myapp.schema.v1.dto.PersonRequest</value>
            </list>
        </property>
    </bean>
</beans>

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">

</bean>

<bean id="jaxb2Marshaller"

class="org.springframework.oxm.jaxb.Jaxb2Marshaller">

<list>

<value>com.myapp.schema.v1.dto.PersonRequest</value>

</list>

</property>

</bean>

</beans>

Output:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<PersonRequest xmlns="http://www.myapp.com/Person">
   <firstName>Peter</firstName>
   <lastName>Smith</lastName>
   <address>
       <street>Bora Street</street>
	   <suburb>Kensington</suburb>
   </address>
</PersonRequest>

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<firstName>Peter</firstName>

<lastName>Smith</lastName>

<street>Bora Street</street>

<suburb>Kensington</suburb>

</address>

</PersonRequest>

Q. How does it know how to map?
A. From the XSD generated Java classes with the JAXB annotations demonstrated in https://www.java-success.com/basic-jaxb-tutorial-with-maven-xsd-1/.

package com.myapp.schema.v1.dto;

import java.io.Serializable;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import com.jaxb.tutorial.AbstractRestDto;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "PersonDto", propOrder = {
    "firstName",
    "lastName",
    "address"
})
@XmlRootElement(name = "PersonRequest")
public class PersonRequest
    extends AbstractRestDto
    implements Serializable
{

    private final static long serialVersionUID = 1L;
    @XmlElement(required = true)
    protected String firstName;
    @XmlElement(required = true)
    protected String lastName;
    @XmlElement(required = true)
    protected AddressDto address;

  
    //getters & setters omitted
}

package com.myapp.schema.v1.dto;

import java.io.Serializable;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

import javax.xml.bind.annotation.XmlType;

import com.jaxb.tutorial.AbstractRestDto;

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "PersonDto", propOrder = {

"firstName",

"lastName",

"address"

})

@XmlRootElement(name = "PersonRequest")

public class PersonRequest

extends AbstractRestDto

implements Serializable

{

private final static long serialVersionUID = 1L;

@XmlElement(required = true)

protected String firstName;

@XmlElement(required = true)

protected String lastName;

@XmlElement(required = true)

protected AddressDto address;

//getters & setters omitted

}

And

package com.myapp.schema.v1.dto;

import java.io.Serializable;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;
import com.jaxb.tutorial.AbstractRestDto;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "AddressDto", propOrder = {
    "street",
    "suburb"
})
public class AddressDto
    extends AbstractRestDto
    implements Serializable
{

    private final static long serialVersionUID = 1L;
    @XmlElement(required = true)
    protected String street;
    @XmlElement(required = true)
    protected String suburb;

    //getters and setters omitted

}

package com.myapp.schema.v1.dto;

import java.io.Serializable;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlType;

import com.jaxb.tutorial.AbstractRestDto;

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "AddressDto", propOrder = {

"street",

"suburb"

})

public class AddressDto

extends AbstractRestDto

implements Serializable

{

private final static long serialVersionUID = 1L;

@XmlElement(required = true)

protected String street;

@XmlElement(required = true)

protected String suburb;

//getters and setters omitted

}

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