Xtykutl

I am trying to create json with spring boot.

class:

public class Person {

    private String name;

    private PersonDetails details;



//     getters and setters...

}

impletentation:

Person person = new Person();

person.setName("Apple");

person.setDetails(new PersonDetails());

So there is a instance of Person with empty details and this is exactly what Jackson is returning:

"person": {

    "name": "Apple",

    "details": {}

}

I want to have json without empty brackets {}:

"person": {

    "name": "Apple"

}

This question's didn't helped me:

• How to tell Jackson to ignore empty object during deserialization?


• How to ignore "null" or empty properties in json, globally, using Spring configuration

Update 1:

I'm using Jackson 2.9.6

Without a custom serializer, jackson will include your object.

Solution 1 : Replace new object with null

person.setDetails(new PersonDetails());

with

person.setDetails(null);

and add

@JsonInclude(Include.NON_NULL)

public class Person {

Solution 2: Custom serializer

public class PersonDetailsSerializer extends StdSerializer<PersonDetails> {



    public PersonDetailsSerializer() {

        this(null);

    }



    public PersonDetailsSerializer(Class<PersonDetails> t) {

        super(t);

    }



    @Override

    public void serialize(

            PersonDetails personDetails, JsonGenerator jgen, SerializerProvider provider)

            throws IOException, JsonProcessingException {

        // custom behavior if you implement equals and hashCode in your code

        if(personDetails.equals(new PersonDetails()){

           return;

        }

        super.serialize(personDetails,jgen,provider);

    }

}

and in your PersonDetails

public class Person {

    private String name;

    @JsonSerialize(using = PersonDetailsSerializer.class)

    private PersonDetails details;

}