ObjectMapper 不考虑注释

Question

I have the below piece of code which would convert an annotated Java object into Json String.

 try {
            String jsonString = mapper.writeValueAsString(obj);
            LOGGER.debug("logAsJson", jsonString);
        } catch (Exception e) {
            LOGGER.warn("logAsJson", "Exception in logging only. Nothing critical! ", e);
        }

And my class would look something like this

public class Car {

@JsonProperty("capabilities")
private List<Capability> capability = new ArrayList<Capability>();

@JsonProperty("periodicity")
@NotNull
private Periodicity periodicity;

@JsonProperty("car_driver")
private List<carDriver> carDriver = new ArrayList<carDriver>();

}

Problem is that while creating the json string from the object, object mapper is not considering the annotations for field names.

Thanks in advance.

Answer 1

You might have imported the json annotation and the object mapper from different library versions. Make sure they are from the same library.

Example,

import com.fasterxml.jackson.annotation.JsonProperty;

and

import com.fasterxml.jackson.databind.ObjectMapper;