使用现有兄弟属性值对属性进行Jackson多态反序列化

public class Animal {
    private String name;

    // Getter and Setter
}

public class Dog extends Animal {
    private String breed;

    // Getter and Setter
}

public class Cat extends Animal {
    private String color;

    // Getter and Setter
}

public class Zoo {
    @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXISTING_PROPERTY, property = "type")
    @JsonSubTypes({
            @JsonSubTypes.Type(value = Dog.class, name = "dog"),
            @JsonSubTypes.Type(value = Cat.class, name = "cat")
    })
    private Animal animal;

    // Getter and Setter
}

public class Main {
    public static void main(String[] args) throws JsonProcessingException {
        String json = "{\"type\":\"dog\",\"animal\":{\"name\":\"Tom\",\"breed\":\"Labrador Retriever\"}}";

        ObjectMapper objectMapper = new ObjectMapper();
        Zoo zoo = objectMapper.readValue(json, Zoo.class);

        System.out.println(zoo.getAnimal().getClass());  // 输出class Dog
        System.out.println(zoo.getAnimal().getName());   // 输出Tom
        System.out.println(((Dog) zoo.getAnimal()).getBreed());  // 输出Labrador Retriever
    }
}