杰克逊将json属性反序列化为对象 [英] Jackson deserialize json property into object

问题描述

我需要反序列化以下json：

I need to deserialize the following json:

{
    //...
    "foo_id":1
    //...
}

进入对象类Foo的 id 属性设置为 foo_id json属性。

Into an object of class Foo with its id property set to the foo_id json property.

我需要在自定义反序列化器中执行此操作。
完成此任务最简单的方法是什么？

I need to do this within a custom deserializer. What is the most easy way to accomplish this?

我想以某种方式将json转换为

I was thinking to somehow "transform" the json to

{
    //...
    "foo_id":{
        "id":1
    }
    //...
}

然后将其委托给杰克逊。

and then delegate this back to Jackson.

在这种情况下，对象的类型为Foo，但还有其他可能不属于此类的对象。此外，在这种情况下，json是一个数字，但我想支持它是否也是一个字符串。
所以，我需要一种通用的方式来做到这一点，这就是为什么我认为委托给杰克逊可能是一个好主意。

In this case, the object is of type Foo, but there are others which might not be of this class. Also, in this case, that json is a number, but I would like to support if it was a string as well. So, I need a kind of generic way to do this, that's why I think delegating back to Jackson might be a good idea.

不允许注释。假设您已经为此属性编写了反序列化器。

No annotations allowed. Suppose you're already writing the Deserializer for this property.

推荐答案

您是否考虑过使用混合注释？使用Jackson 2.2，您还可以使用转换器进行两步处理（ @JsonDeserialize（converter = MyConverter.class ）。

Have you considered use of mix-in annotations? With Jackson 2.2, you could also use converters to do two-step processing (@JsonDeserialize(converter=MyConverter.class).

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