Spring类别子类json问题

Question

我有一个如下的实体：

@Entity
@Table(name = "Category")
public class Category implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Integer id;

    @Column(name = "name")
    private String name;

    @Column(name = "color")
    @JsonInclude(Include.NON_NULL)
    private String color;

    @ManyToOne(cascade = { CascadeType.ALL })
    @JsonInclude(Include.NON_NULL)
    @JoinColumn(name = "parent_id")
    @JsonManagedReference
    private Category parent;

    @OneToMany(mappedBy = "parent")
    @JsonInclude(Include.NON_NULL)
    @JsonBackReference
    private Set<Category> subcategories = new HashSet<Category>();}

我正在使用findAll()中的JPA repo，我到目前为止的是类别列表和父作为子项：

 {
    "id": 7,
    "name": "Home",
    "parent": {
      "id": 1,
      "name": "News",
      "color": "#d50000"
    }
  },

我想要的是相反的，父母和孩子的清单，我需要改变什么？