How to ignore Json root name in Spring Boot?-CodePudding

I have a question regarding Json serialization / deserialization in Spring Boot.

I have an entity class, what has embedded id:

@Entity
@Table(name="USER_TABLE")
@Getter
@Setter
public class User {

   private UserPK id;
   private String name;

}

/* Getters and Setters excluded */
public class UserPK implements Serializable {
    private Long userId;
    private Long personalId;
}

Now if I serialize an object, Spring Boot put a root "id" tag inside JSON. Is it possible to exclude this, and put it into the same level of the name property?

Actual result:

{
    "id":{"userId":321, "personalId":222},
    "name":"John Doe"
}

Expected result:

{
    "userId":321,
    "personalId":222,
    "name":"John Doe"
}

Thank you in advance!

CodePudding user response：

You may annotate User.id field with @JsonUnwrapped annotation to effectively flatten the underlying structure like this:

public class User {
    @JsonUnwrapped
    private UserPK id;
    private String name;
}

See the docs.