Spring configure @ResponseBody JSON format

Question

Imagine I have this annotated method in a Spring 3 @Controller

@RequestMapping("") public @ResponseBody MyObject index(@RequestBody OtherObject obj) {     MyObject result = ...;     return result; } 

But I need to configure the output json format, just as if I were doing:

ObjectMapper om = new ObjectMapper(); om.configure(JsonGenerator.Feature.QUOTE_FIELD_NAMES, true); om.getSerializationConfig()         .setSerializationInclusion(JsonSerialize.Inclusion.NON_DEFAULT); om.getSerializationConfig()         .set(SerializationConfig.Feature.INDENT_OUTPUT, false); 

Is there any way to configure this behaviour?

I've found a couple of related questions, but I am not sure about how to adapt them to my specific case:

1. spring prefixjson with responsebody
2. Who sets response content-type in Spring MVC (@ResponseBody)

Thank you !

Answer 1

For the folks who are using Java based Spring configuration:

@Configuration @ComponentScan(basePackages = "com.domain.sample") @EnableWebMvc public class SpringConfig extends WebMvcConfigurerAdapter { ....      @Override     public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {         final MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();         final ObjectMapper objectMapper = new ObjectMapper();         objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);         converter.setObjectMapper(objectMapper);         converters.add(converter);         super.configureMessageConverters(converters);     }  ....  } 

I'm using MappingJackson2HttpMessageConverter - which is from fasterxml.

<dependency>   <groupId>com.fasterxml.jackson.core</groupId>   <artifactId>jackson-databind</artifactId>   <version>2.3.1</version> </dependency> 

If you want to use codehaus-jackson mapper, instead use this one MappingJacksonHttpMessageConverter

 <dependency>     <groupId>org.codehaus.jackson</groupId>     <artifactId>jackson-mapper-asl</artifactId>     <version>${codehaus.jackson.version}</version>  </dependency> 

Answer 2

I needeed to solve very similar problem, which is configuring Jackson Mapper to "Do not serialize null values for Christ's sake!!!".

I didn't want to leave fancy mvc:annotation-driven tag, so I found, how to configure Jackson's ObjectMapper without removing mvc:annotation-driven and adding not really fancy ContentNegotiatingViewResolver.

The beautiful thing is that you don't have to write any Java code yourself!

And here is the XML configuration (don't be confused with different namespaces of Jackson classes, I simply used new Jakson 2.x library ... the same should also work with Jackson 1.x libraries):

<mvc:annotation-driven>     <mvc:message-converters register-defaults="true">         <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">             <property name="objectMapper">                 <bean class="com.fasterxml.jackson.databind.ObjectMapper">                     <property name="serializationInclusion">                         <value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>                     </property>                 </bean>             </property>         </bean>     </mvc:message-converters> </mvc:annotation-driven>