https://blog.csdn.net/xiaofei__/article/details/89571320
(1)List转换为JSONArray
List<T> list = new ArrayList<T>(); JSONArray array= JSONArray.parseArray(JSON.toJSONString(list));
(2)JSONArray转换为List
JSONArray array = new JSONArray(); List<EventColAttr> list = JSONObject.parseArray(array.toJSONString(), EventColAttr.class);