Spring @ResponseBody Jackson JsonSerializer with JodaTime

Question

I have below Serializer for JodaTime handling:

public class JodaDateTimeJsonSerializer extends JsonSerializer {

    private static final Str         


        

Answer 1

If you simply have the Jackson JARs on your classpath, and return a @ResponseBody, Spring will automatically convert the Model object to JSON. You don't need to annotate anything in the Model to get this to work.

Answer 2

If you are using Spring Boot, try this in application.yml :

spring:
    jackson:
       date-format: yyyy-MM-dd
       time-zone: Asia/Shanghai
       joda-date-time-format: yyyy-MM-dd

Answer 3

Although you can put an annotation for each date field, is better to do a global configuration for your object mapper. If you use jackson you can configure your spring as follow:

<bean id="jacksonObjectMapper" class="com.company.CustomObjectMapper" />

<bean id="jacksonSerializationConfig" class="org.codehaus.jackson.map.SerializationConfig"
    factory-bean="jacksonObjectMapper" factory-method="getSerializationConfig" >
</bean>

For CustomObjectMapper:

public class CustomObjectMapper extends ObjectMapper {

    public CustomObjectMapper() {
        super();
        configure(Feature.WRITE_DATES_AS_TIMESTAMPS, false);
        setDateFormat(new SimpleDateFormat("EEE MMM dd yyyy HH:mm:ss 'GMT'ZZZ (z)"));
    }
}

Of course, SimpleDateFormat can use any format you need.

Answer 4

Same using JavaConfig of Spring 3:

@Configuration
@ComponentScan()
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter
{

    @Override
    public void configureMessageConverters(final List<HttpMessageConverter<?>> converters)
    {
        converters.add(0, jsonConverter());
    }

    @Bean
    public MappingJacksonHttpMessageConverter jsonConverter()
    {
        final MappingJacksonHttpMessageConverter converter = new MappingJacksonHttpMessageConverter();
        converter.setObjectMapper(new CustomObjectMapper());

        return converter;
    }
}

Answer 5

@Moesio pretty much got it. Here's my config:

<!-- Configures the @Controller programming model -->
<mvc:annotation-driven/>

<!-- Instantiation of the Default serializer in order to configure it -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapterConfigurer" init-method="init">
    <property name="messageConverters">
        <list>
            <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
                <property name="objectMapper" ref="jacksonObjectMapper" />
            </bean>
        </list>
    </property>
</bean>

<bean id="jacksonObjectMapper" class="My Custom ObjectMapper"/>

<bean id="jacksonSerializationConfig" class="org.codehaus.jackson.map.SerializationConfig"
    factory-bean="jacksonObjectMapper" factory-method="getSerializationConfig" />

The bit that got me is that <mvc:annotation-driven/> makes its own AnnotationMethodHandler and ignores the one you make manually. I got the BeanPostProcessing idea from http://scottfrederick.blogspot.com/2011/03/customizing-spring-3-mvcannotation.html to configure the one that gets used, and voilà! Works like a charm.