Jackson 2.0 with Spring 3.1

Question

Is Spring MVC 3.1 compatible with Jackson 2.0? Will Spring MVC\'s automatic detection of Jackson on the classpath, and delegation to Jackson for requests with a JSON content

Answer 1

For Spring 3.1.2 and Jackson 2 -

• As outlined above, the automatic support JustWorks™

• but configuration doesn't, as most of the web is littered with pre Spring3/Jackson2 configuration mechanisms

So for posterity, I'll list out a hack(? or is this the official way) to configure the Jackson converter. In this particular case, I am configuring the converter to return dates in the ISO-8601 format:

package foo.bar.JacksonConfig;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.stereotype.Component;

@Component
public class JacksonConfig implements BeanPostProcessor {

    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        return bean;
    }

    public Object postProcessAfterInitialization(Object bean, String beanName)
            throws BeansException {
        if (bean instanceof MappingJackson2HttpMessageConverter) {
            MappingJackson2HttpMessageConverter jsonConverter =
                    (MappingJackson2HttpMessageConverter) bean;
            ObjectMapper objectMapper = jsonConverter.getObjectMapper();
            objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
            jsonConverter.setObjectMapper(objectMapper);
        }
        return bean;
    }
}