by adding @JsonInclude(value = JsonInclude.Include.NON_NULL) on the POJO class, Jackson will ignore the null during deserialization, it is good.

But during serialization, the fields of which value is null are also ignored.

How to realize it by configure the ObjectMapper without annotations on the POJO clas?

And Is it possible only by adding annotation(s) on the POJO class, to make jackson ignore null during deserialization but not ignore null during serialization?

Thanks a lot!