java parse json文件jsonobject

Question

我的JSON文件具有这样的形式：

{
  "Region_1": {
    "Area_1": {
      "id": "id_1",
      "email": "email_1"
    },
    "Area_2": {
      "id": "id_2",
      "email": "email_2"
    }
  },
  "Region_2": {
      "Area_1": {
      "id": "id_1",
      "email": "email_1"
    },
    "Area_2": {
      "id": "id_2",
      "email": "email_2"
    }
  }
}

我需要使用JsonObject来解析此结构，我已经有代码可以解析此结构，但不仅可以获取region_2。 region_1获取。

JSONObject obj = new JSONObject(fileData);
    for (Map.Entry<String, Object> entry : obj.entrySet()) {
        String region = entry.getKey().toString();
        JSONObject areas = new JSONObject(entry.getValue().toString());

        System.out.println("region: " + region);

        List links = areas.entrySet().collect({ it ->
            String area = it.getKey().toString();

            System.out.println("area: " + area);

            JSONObject areaData = new JSONObject(it.getValue().toString());
            String code = areaData.getString("id");
            String email = areaData.getString("email");

            System.out.println("code: " + code.toString());
            System.out.println("email: " + email.toString());
       })
    } 

为什么只有第一个对象来自JSON文件？