Spring Boot @ResponseBody没有序列化实体ID

Question

有一个奇怪的问题，无法弄清楚如何处理。有简单的POJO：

@Entity

@Table(name = "persons")

public class Person {

    @Id

    @GeneratedValue

    private Long id;

    @Column(name = "first_name")

    private String firstName;

    @Column(name = "middle_name")

    private String middleName;

    @Column(name = "last_name")

    private String lastName;

    @Column(name = "comment")

    private String comment;

    @Column(name = "created")

    private Date created;

    @Column(name = "updated")

    private Date updated;

    @PrePersist

    protected void onCreate() {

        created = new Date();

    }

    @PreUpdate

    protected void onUpdate() {

        updated = new Date();

    }

    @Valid

    @OrderBy("id")

    @OneToMany(mappedBy = "person", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)

    private List<PhoneNumber> phoneNumbers = new ArrayList<>();

    public Long getId() {

        return id;

    }

    public void setId(Long id) {

        this.id = id;

    }

    public String getFirstName() {

        return firstName;

    }

    public void setFirstName(String firstName) {

        this.firstName = firstName;

    }

    public String getMiddleName() {

        return middleName;

    }

    public void setMiddleName(String middleName) {

        this.middleName = middleName;

    }

    public String getLastName() {

        return lastName;

    }

    public void setLastName(String lastName) {

        this.lastName = lastName;

    }

    public String getComment() {

        return comment;

    }

其余端点：

@ResponseBody

@RequestMapping(method = RequestMethod.GET)

public List<Person> listPersons() {

    return personService.findAll();

}

在json响应中，除了Id之外，还有其他所有字段，我需要在前端编辑/删除人员。如何配置Spring Boot来序列化ID？

这就是现在的响应：

[{

  "firstName": "Just",

  "middleName": "Test",

  "lastName": "Name",

  "comment": "Just a comment",

  "created": 1405774380410,

  "updated": null,

  "phoneNumbers": [{

    "phoneNumber": "74575754757"

  }, {

    "phoneNumber": "575757547"

  }, {

    "phoneNumber": "57547547547"

  }]

}]

UPD具有双向休眠映射，可能与问题有关。