CODEWITHSUNDEEP
xmljaxbjackson
Gsb128379
Gsb128379

Reputation: 61

Jackson unable to consider @XmlElement while serializing to JSON

I have a contract class that contains elements with @XmlElement tags. For ex

 @XmlElement(name = "balancemoney")
 protected Amount balanceMoney;

Using the JAXBContext I am able to generate the xml with proper tags.

However, when I use the jackson provided library, the JSON tag still comes in as 'balanceMoney' instead of 'balancemoney'

How do I tell Jackson to consider the @XmlElement tag.

Below is the code which does this.

    //Function to display request object.
public void displayXML(Object reqResp){
    try{
        JAXBContext jaxbContext = JAXBContext.newInstance(reqResp.getClass());
        Marshaller jaxbMarshaller = jaxbContext.createMarshaller();

        // output pretty printed
        jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

        ByteArrayOutputStream bStream=new ByteArrayOutputStream();

        //jaxbMarshaller.marshal(reqResp, System.out);
        jaxbMarshaller.marshal(reqResp,bStream );

        logger.info(bStream.toString());    

        }catch(JAXBException e){
            logger.info(e.getMessage());
        }
        logger.info("*** Payload is: " + reqResp.toString());
}

//Function to display as JSON
public void displayJSON(Object reqResp) throws JsonGenerationException, JsonMappingException, IOException{
    ObjectMapper mapper = new ObjectMapper();
    logger.info(mapper.defaultPrettyPrintingWriter().writeValueAsString(reqResp));

}

Upvotes: 6

Views: 9822

Answers (3)

sub
sub

Reputation: 669

If we migrating from Javax to Jakarta in Jaxbclasses, then below should work

 XmlMapper xmlMapper = new XmlMapper();
      xmlMapper.registerModule(new JakartaXmlBindAnnotationModule());

Upvotes: 1

kinjelom
kinjelom

Reputation: 6450

  • Maven dependency - pom.xml:

    <dependency>
    <groupId>com.fasterxml.jackson.module</groupId>
    <artifactId>jackson-module-jaxb-annotations</artifactId>
    <version>2.6.1</version>
</dependency>

  • Custom ObjectMapper configuration (uncomment all annotations to register this mapper as default in Spring):

    //@Configuration
public class JacksonConfig {

    //@Primary
    //@Bean
    public static ObjectMapper createCustomObjectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        AnnotationIntrospector aiJaxb = new JaxbAnnotationIntrospector(TypeFactory.defaultInstance());
        AnnotationIntrospector aiJackson = new JacksonAnnotationIntrospector();
        // first Jaxb, second Jackson annotations
        mapper.setAnnotationIntrospector(AnnotationIntrospector.pair(aiJaxb, aiJackson));
        return mapper;
    }
}

  • Code to display as JSON:

    public void displayJSON(Object reqResp) throws JsonProcessingException{
    ObjectMapper mapper = JacksonConfig.createCustomObjectMapper();
    LOG.info(mapper.writeValueAsString(reqResp));
}

Upvotes: 12

user2880879
user2880879

Reputation: 297

According to Using JAXB annotations with Jackson: Enabling JAXB annotation support, you need to set mapper.getDeserializationConfig().setAnnotationIntrospector(new JaxbAnnotationIntrospector()); to enable Jackson to use JAXB annotation.

Upvotes: 2

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