Question

我的json响应如下：

cmrun.out

模特课：

{"IsValid":false,"ModelErrors":null,"ValidationErrors":[10000]}

Object Mapper代码：

public class ShipmentResponse {
    private boolean isValid;
    private ModelErrors modelErrors;
    private List<Integer> validationErrors = null;

我无法在解析之后将 validationErrors 从json映射到java，即validationErrors = null。我期待validationErrors = {1000}但不确定为什么？我知道我们可以使用TypeReference返回数组或列表但不嵌套在数据对象中。

Answer 1

试试这个

object DepType extends App{

  println("bla")

  def feedExplicitInstance[AnimalInstance]
      (animal:AnimalTypeClass[AnimalInstance])(food:animal.FoodThatAnimalLikes) = {
      animal.feed(food)
  }

 //  Does not compile:

  def feedImplicitInstance[AnimalInstance,Food](food:Food)
  (implicit animal:AnimalTypeClass[AnimalInstance],aux:Cat.Aux[Food,AnimalInstance]) = {
    animal.feed(food)
//    Error:(17, 17) type mismatch;
//    found   : food.type (with underlying type Food)
//    required: animal.FoodThatAnimalLikes
//    animal.feed(food)

  }
  feedExplicitInstance(Cat.CatInstance)(new CatFood())

}

trait Food{
  def eat():Unit
}

trait AnimalTypeClass [AnimalInstance] {
  type FoodThatAnimalLikes <: Food
  def feed(f:FoodThatAnimalLikes)=f.eat()
}

trait Cat

class CatFood extends Food{
  override def eat(): Unit = println("meow")
}

object Cat {
  type Aux[Food,Animal]= AnimalTypeClass[Animal] {type FoodThatAnimalLikes = Food}

  implicit object CatInstance extends AnimalTypeClass[Cat]{
    override type FoodThatAnimalLikes = CatFood
  }
}

一般来说，你的房产名称和实际的json（案件事宜）

都有错配

使用Jackson Object Mapper将从json到java的整数列表反序列化

1 个答案: