JAVA EE: XML Marshalling and UnMarshalling using Spring and JAXB XML binding framework

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XML Marshalling and UnMarshalling using Spring and JAXB XML binding framework - XML Config

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"

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

    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ram.core</groupId>

    <artifactId>SpringDemo</artifactId>

    <packaging>jar</packaging>

    <version>1.0-SNAPSHOT</version>

    <name>SpringDemo</name>

    <url>http://maven.apache.org</url>

    <properties>

        <spring.version>5.1.1.RELEASE</spring.version>

    </properties>

    <dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>4.8.2</version>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-core</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>${spring.version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-oxm</artifactId>

            <version>${spring.version}</version>

        </dependency>

    </dependencies>

</project>

Company.java

package com.ram.core.model;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlAttribute;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name = "CompanyInfo", namespace = "com.ram.core")

@XmlAccessorType(XmlAccessType.NONE)

public class Company

{

    @XmlAttribute(name = "Id")

    private Integer id;

    @XmlElement(name = "CompanyName")

    private String companyName;

    @XmlElement(name = "CEO_Name")

    private String ceoName;

    @XmlElement(name = "Number_Of_Employees")

    private Integer numberOfEmployees;

    public Integer getId()

    {

        return id;

    }

    public void setId(Integer id)

    {

        this.id = id;

    }

    public String getCompanyName()

    {

        return companyName;

    }

    public void setCompanyName(String companyName)

    {

        this.companyName = companyName;

    }

    public String getCeoName()

    {

        return ceoName;

    }

    public void setCeoName(String ceoName)

    {

        this.ceoName = ceoName;

    }

    public Integer getNumberOfEmployees()

    {

        return numberOfEmployees;

    }

    public void setNumberOfEmployees(Integer numberOfEmployees)

    {

        this.numberOfEmployees = numberOfEmployees;

    }

    @Override

    public String toString()

    {

        return "Company [id=" + id + ", companyName=" + companyName

                + ", ceoName=" + ceoName + ", numberOfEmployees="

                + numberOfEmployees + "]";

    }

}

XMLConverter.java

package com.ram.core;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import javax.xml.transform.stream.StreamResult;

import javax.xml.transform.stream.StreamSource;

import org.springframework.oxm.Marshaller;

import org.springframework.oxm.Unmarshaller;

public class XMLConverter

{

    private Marshaller marshaller;  

    private Unmarshaller unmarshaller;

    public Marshaller getMarshaller()

    {

        return marshaller;

    }

    public void setMarshaller(Marshaller marshaller)

    {

        this.marshaller = marshaller;

    }

    public Unmarshaller getUnmarshaller()

    {

        return unmarshaller;

    }

    public void setUnmarshaller(Unmarshaller unmarshaller)

    {

        this.unmarshaller = unmarshaller;

    }

    public void convertFromObjectToXML(Object object, String filepath)

            throws IOException

    {

        FileOutputStream os = null;

        try

        {

            os = new FileOutputStream(filepath);

            getMarshaller().marshal(object, new StreamResult(os));

        }

        finally

        {

            if (os != null)

            {

                os.close();

            }

        }

    }

    public Object convertFromXMLToObject(String xmlfile)

            throws IOException

    {

        FileInputStream is = null;

        try

        {

            is = new FileInputStream(xmlfile);

            return getUnmarshaller().unmarshal(new StreamSource(is));

        }

        finally

        {

            if (is != null)

            {

                is.close();

            }

        }

    }

}

applicationContext.xml

<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-4.3.xsd">

    <bean id="XMLConverter" class="com.ram.core.XMLConverter">

        <property name="marshaller" ref="jaxbMarshaller" />

        <property name="unmarshaller" ref="jaxbMarshaller" />

    </bean>

    <bean id="jaxbMarshaller"

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

        <property name="packagesToScan" value="com.ram.core.model" />

        <property name="marshallerProperties">

            <map>

                <entry key="jaxb.formatted.output">

                    <value type="boolean">true</value>

                </entry>

            </map>

        </property>

    </bean>

</beans>

App.java

package com.ram.core;

import java.io.IOException;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ram.core.model.Company;

public class App

{

    private static final String XML_FILE_NAME = "company.xml";

    public static void main(String[] args) throws IOException

    {

        ApplicationContext context = new ClassPathXmlApplicationContext(

                "applicationContext.xml");

        XMLConverter converter = (XMLConverter) context

                .getBean(XMLConverter.class);

        // Perform Marshaling

        Company company = new Company();

        company.setId(201);

        company.setCompanyName("Google");

        company.setCeoName("Peter");

        company.setNumberOfEmployees(50000);

        // from object to XML file

        converter.convertFromObjectToXML(company, XML_FILE_NAME);

        System.out.println("Converted Object to XML!");

        // from XML to object

        Company company2 = (Company) converter

                .convertFromXMLToObject(XML_FILE_NAME);

        System.out.println(company2);

        System.out.println("Converted XML to Object!");

    }

}

Output:

Converted Object to XML!

Company [id=201, companyName=Google, ceoName=Peter, numberOfEmployees=50000]

Converted XML to Object!

company.xml

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

<ns2:CompanyInfo xmlns:ns2="com.ram.core" Id="201">

    <CompanyName>Google</CompanyName>

    <CEO_Name>Peter</CEO_Name>

    <Number_Of_Employees>50000</Number_Of_Employees>

</ns2:CompanyInfo>