//CONF: lombok.copyJacksonAnnotationsToAccessors = true //version 8: Jackson deps are at least Java7+. import java.util.HashMap; import java.util.Map; import com.fasterxml.jackson.annotation.JsonProperty; import lombok.Data; @Data public class JacksonJsonProperty2 { @JsonProperty("a") String propertyOne; @JsonProperty("b") int propertyTwo; Map additional = new HashMap<>(); }