java – Spring不发送JSON响应中的所有字段

import java.io.Serializable;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.IdClass;
import javax.persistence.Table;

import lombok.Data;


@Entity
@Table(name="user_linked_email")
@IdClass(UserLinkedEmailKey.class)
@Data
public class UserLinkedEmail implements Serializable {


    /**
     * serialVersionUID
     */
    private static final long serialVersionUID = 1L;

    @Id
    private Integer userId;
    @Id
    private String linkedEmail;


    /**
     * The Following are appearing in JSON response
     */
    private boolean status;

    private boolean preferredFlag;

}

UserLinkedEmailKey类：

public class UserLinkedEmailKey implements Serializable {
    /**
     * serialVersionUID
     */
    private static final long serialVersionUID = 1L;

    private Integer userId;
    private String linkedEmail;
}

和我的控制器片段：

public org.springframework.http.ResponseEntity<?> getLinkedEmails(@PathVariable(value = "userId") Integer zepoUserId) {


        try {
            List<UserLinkedEmail> linkedEmails = userService.getLinkedEmails(zepoUserId);


            //linkedEmails till this point has all 4 fields

            return new ResponseEntity<List<UserLinkedEmail>>(linkedEmails,HttpStatus.OK);

        } catch (Exception e) {
            //
        }

JSON中的响应如下：

[
  {
    "status": false,"preferredFlag": true
  },{
    "status": true,"preferredFlag": false
  },"preferredFlag": false
  }
]

尽管Spring-Data JPA从存储库返回整个对象,为什么其他两个字段,即userId和linkedEmail没有显示出来？