Configure Jackson to omit lazy-loading attributes in Spring Boot

Question

In spring boot mvc project with pure java configuration how to configure Jackson to omit lazy load Attributes

Answer 1

If you are using SpringBoot, ideally you should already have Hibernate4Module. Else add this dependency

    
        com.fasterxml.jackson.datatype
        jackson-datatype-hibernate4
        2.5.3
    

Next create a class called "HibernateAwareObjectMapper" or whatever you want to name it:

with following contents:

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.hibernate4.Hibernate4Module;

    public class HibernateAwareObjectMapper extends ObjectMapper {

        public HibernateAwareObjectMapper() {
            registerModule(new Hibernate4Module());
        }
    }

for different versions of Hibernate, refer to these Hibernate modules:

// for Hibernate 4.x:
mapper.registerModule(new Hibernate4Module());
// or, for Hibernate 5.x
mapper.registerModule(new Hibernate5Module());
// or, for Hibernate 3.6
mapper.registerModule(new Hibernate3Module());

Now you need to register your HibernateAwareObjectMapper through a message Converter. For this create a Config class that extens extends WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter. (If you already have one just follow the next step).

Now register the MessageConverter using HibernateObjectMapper :

@Override
public void configureMessageConverters(List> converters){
    List supportedMediaTypes=new ArrayList<>();
    supportedMediaTypes.add(MediaType.APPLICATION_JSON);
    supportedMediaTypes.add(MediaType.TEXT_PLAIN);
    MappingJackson2HttpMessageConverter converter=new MappingJackson2HttpMessageConverter();
    converter.setObjectMapper(new HibernateAwareObjectMapper());
    converter.setPrettyPrint(true);
    converter.setSupportedMediaTypes(supportedMediaTypes);
    converters.add(converter);
    super.configureMessageConverters(converters);
}

Viola !!! That should be enough. This is the pure-java (no-xml) way of doing this for a spring boot web app.

Feel free to comment if you want to add to Answer.