WebMVCConfig.java

package com.capitalone.dashboard.config;

import com.capitalone.dashboard.mapper.CustomObjectMapper;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.SerializationFeature;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import java.util.List;

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.capitalone.dashboard.rest")
public class WebMVCConfig extends WebMvcConfigurerAdapter {
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable("api");
    }

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        MappingJackson2HttpMessageConverter jackson = new MappingJackson2HttpMessageConverter();

        jackson.setObjectMapper(new CustomObjectMapper());
        jackson.getObjectMapper()
                .disable(SerializationFeature.WRITE_NULL_MAP_VALUES)
                .enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING)
                .setSerializationInclusion(JsonInclude.Include.NON_NULL);

        converters.add(jackson);
    }
}