相关疑难解决方法(0)

这是我的课程:

@XmlRootElement(name="Zoo")
class Zoo {
    //@XmlElementRef
    public Collection<? extends Animal> animals;
}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlSeeAlso({Bird.class, Cat.class, Dog.class})
@XmlDiscriminatorNode("@type")
abstract class Animal {
    @XmlElement
    public String name; 
}

@XmlDiscriminatorValue("Bird")
@XmlRootElement(name="Bird")
class Bird extends Animal {
    @XmlElement
    public String wingSpan;
    @XmlElement
    public String preferredFood;
}

@XmlDiscriminatorValue("Cat")
@XmlRootElement(name="Cat")
class Cat extends Animal {
    @XmlElement
    public String favoriteToy;
}

@XmlDiscriminatorValue("Dog")
@XmlRootElement(name="Dog")
class Dog extends Animal {
    @XmlElement
    public String breed;
    @XmlElement
    public String leashColor;
}

这是序列化的JSON:

   {
        "animals": [
            {
                "type": "Bird",
                "name": "bird-1",
                "wingSpan": …