Api模型/儿童属性在swagger ui中看不到

Question

我有PET和CATEGORY课程。 PET有一个类别对象。但是，当我运行应用程序时，我没有在Swagger UI文档中看到Category类的字段 我不使用弹簧而且不想使用弹簧。我不确定缺少什么？

@ApiModel(value = "A pet is a person's best friend" )
public class Pet {
  private long id;
  private Category category;

public long getId() {
    return id;
  }


  @ApiModelProperty(value = "ID", required=true)
  public void setId(long id) {
    this.id = id;
  }


  public Category getCategory() {
    return category;
  }


  @ApiModelProperty(value = "CAT", required=true)
  public void setCategory(Category category) {
    this.category = category;
  }

AND CLASS CATEGORY as

@ApiModel(value = "Category")
public class Category {
  private long id;
  private String name;




  @ApiModelProperty(value = "ID", required=true)
  public long getId() {
    return id;
  }


  public void setId(long id) {
    this.id = id;
  }

OUTPUT SWAGGER UI文档

{
  "id": 0,
  "category": {}
}

MISSING

id缺失

  "category": {
 "id": 0
}