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));
}
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)); }
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.
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