Spring, Jackson and Customization (e.g. CustomDeserializer)

by

You don’t say how you’re using Jackson in Spring, so I’ll assume you’re using it through <mvc:annotation-driven/> and the @RequestBody and/or @ResponseBody annotations.

One of the things that <mvc:annotation-driven/> does is to register a AnnotationMethodHandlerAdapter bean which comes with a number of pre-configured HttpMessageConverter beans, including MappingJacksonHttpMessageConverter, which handles marshalling to and from Jackson-annotated model classes.

Now MappingJacksonHttpMessageConverter has a setObjectMapper() method, which allows you to override the default ObjectMapper. But since MappingJacksonHttpMessageConverter is created behind the scenes by <mvc:annotation-driven/>, you can’t get to it.

However, <mvc:annotation-driven/> is just a convenient short-cut. It’s just as a valid to declare your own AnnotationMethodHandlerAdapter bean, injecting into it your own MappingJacksonHttpMessageConverter bean (via the messageConverters property), and injecting your own customized ObjectMapper into that.

You then have the problem of how to build a custom ObjectMapper, since it’s not a very Spring-friendly class. I suggest writing your own simple implementation of FactoryBean.

So you’d end up with something like this:

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
   <property name="messageConverters">
      <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
         <property name="objectMapper">
            <bean class="com.x.MyObjectMapperFactoryBean"/>
         </property>
      </bean>
   </property>
</bean>

More Related Contents:

  1. Serializing enums with Jackson
  2. Jackson 2.0 with Spring 3.1
  3. Parsing JSON in Spring MVC using Jackson JSON
  4. How do I obtain the Jackson ObjectMapper in use by Spring 4.1?
  5. REST with Spring and Jackson full data binding
  6. Cannot deserialize instance of object out of START_ARRAY token in Spring Webservice
  7. Spring 3.0 making JSON response using jackson message converter
  8. Why does Jackson 2 not recognize the first capital letter if the leading camel case word is only a single letter long?
  9. Spring @ResponseBody Jackson JsonSerializer with JodaTime
  10. Spring-MVC 406 Not Acceptable instead of JSON Response
  11. Infinite Recursion with Jackson JSON and Hibernate JPA issue
  12. Configuring ObjectMapper in Spring
  13. JsonMappingException: No suitable constructor found for type [simple type, class ]: can not instantiate from JSON object
  14. How to customise the Jackson JSON mapper implicitly used by Spring Boot?
  15. Spring MVC – How to return simple String as JSON in Rest Controller
  16. JSON character encoding – is UTF-8 well-supported by browsers or should I use numeric escape sequences?
  17. Spring MVC – HttpMediaTypeNotAcceptableException
  18. Right way to write JSON deserializer in Spring or extend it
  19. How to configure MappingJacksonHttpMessageConverter while using spring annotation-based configuration?
  20. Spring Security and JSON Authentication
  21. In Spring MVC, how can I set the mime type header when using @ResponseBody
  22. JPA Transient Annotation and JSON
  23. Post Nested Object to Spring MVC controller using JSON
  24. Can Jackson be configured to trim leading/trailing whitespace from all string properties?
  25. Load data from Webservice (asmx) to jqgrid. Please help me
  26. how to send an array in url request
  27. HTTP Status 406. Spring MVC 4.0, jQuery, JSON
  28. Spring @RequestBody containing a list of different types (but same interface)
  29. JsonMappingException: could not initialize proxy – no Session
  30. Parsing json into java objects in spring-mvc

Leave a Comment