How can I change Jacksons Configuration when using Spring Data REST?

Question

I\'m trying to configure Jackson to show JSR 310 instants in ISO 8601 format.

@Configuration
class Jackson {

    @Bean
    static ObjectMapper objectMapper(         


        

Answer 1

You can (and probably should) you RepositoryRestConfigurerAdapter (in Spring Data Rest 2.4) or RepositoryRestMvcConfiguration which expose the configureObjectMapper method.

@Configuration
class RepositoryRestAdapterConfiguration extends RepositoryRestConfigurerAdapter {

    @Override
    public void configureJacksonObjectMapper(ObjectMapper objectMapper) {
        objectMapper.registerModule(new JavaTimeModule());
        objectMapper.disable( SerializationFeature.WRITE_DATES_AS_TIMESTAMPS );
    }

}

Answer 2

Actually, you could make it more bootify just using jackson auto-configuration properties in application.properties (or application.yml):

spring.jackson.serialization.write_dates_as_timestamps=false

Answer 3

After some experimentation, I found that if I annotate my "setter" (setter injection) with it will get run. This is a little simpler, and cleaner than using field injection and @PostConstruct.

@Configuration
class Jackson {

   @Autowired
   void configureObjectMapper( final ObjectMapper objectMapper ) {
    objectMapper.disable( SerializationFeature.WRITE_DATES_AS_TIMESTAMPS );
   }
}

Answer 4

I think one way could be to inject the ObjectMapper in a suitable bean class and then do the setting in a @PostConstruct method, e.g.:

@Configuration // or @Service or some bean
public class SomeClass ... {

    @Autowired
    private ObjectMapper objectMapper;

    @PostConstruct
    private void configureObjectMapper() {
        objectMapper.disable( SerializationFeature.WRITE_DATES_AS_TIMESTAMPS );
    }

}