package egovframework.com.cmm; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.ser.DefaultSerializerProvider; import egovframework.com.cmm.NullSerializer; @SuppressWarnings("serial") public class CustomJacksonObjectMapper extends ObjectMapper { public CustomJacksonObjectMapper() { super(); DefaultSerializerProvider.Impl sp = new DefaultSerializerProvider.Impl(); sp.setNullValueSerializer(new NullSerializer()); this.setSerializerProvider(sp); } }