使用jackson反序列化可选多态字段

Question

js prettyprint-override">[
  {
    "name": "Cinema Ticket"
  }, 
  {
    "name": "Car Sharing",
    "properties": { ... }
  },
  {
    "name": "New Book",
  }
]

Jackson版本:2.10.1

谢谢你的回答！

Answer 1

我想你有这样的东西：

public class BaseProduct {
   public String name;
}

public class CarSharing extends BaseProduct {
    public String properties;
}

public class Book extends BaseProduct {
}

您可以使用Jackson多态功能不显示属性字段，而不是将其设置为null。类似于：

@JsonTypeInfo(use = JsonTypeInfo.Id.MINIMAL_CLASS, include = JsonTypeInfo.As.PROPERTY, property = "type")
public class BaseProduct {
     public String name;
}

产出将是：

[
  {
    "type": ".Book",
    "name": "Book name"
  },
  {
    "type": ".CarSharing",
    "name": "Car share name",
    "properties": "a property field"
  }
]