Jackson JSON映射键作为包含对象的属性 [英] Jackson JSON map key as property of contained object

问题描述

给定这样的结构：

{
  "nameOfObject": { "score": 100 },
  "anotherObject": { "score": 30 }
}

是可以将其映射到：

class Container {
  Map<String, ScoreKeeper> scoreKeepers;
}

class ScoreKeeper {
  String name;
  int score;
}

这样你最终得到的是名称属性 ScoreKeeper 实例设置为nameOfObject和anotherObject ，分别？

So that you end up with the name property of the ScoreKeeper instances set to "nameOfObject" and "anotherObject", respectively?

推荐答案

我坚信将POJO与外部化分开。将您的JSON读入Map，然后构建像这样的Container / ScoreKeeper对象（适用于任何拼写错误）：

I am a firm believer in separating your POJOs from externalization. Read your JSON into a Map and then build you Container/ScoreKeeper objects like this (apols for any typos):

mapper = new ObjectMapper();

Map<String,Object> data = mapper.readValue(inputstream, Map.class);

Container c = new Container();

for(Map.Entry<String, Object> me : data.entrySet()) {
    String key = me.getKey();
    Map info = (Map) me.getValue();

    ScoreKeeper sk = new ScoreKeeper();
    sk.setName(key);
    Integer q = info.get("score");
    sk.setScore(q);

    c.put(key, sk);
}

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