Java Json 格式转化 —— 将 A.B.C 转成 {"A":[{"B":[{"C":"XXX"}]}]}

public class ResultDemo {
    /**
     * 将 A.B.C 变成如下格式
     *  {"A":[{"B":[{"C":"XXX"}]}]}
     */
    public static void main(String args[]){
        String module = "第一层.第二层.第三层";
        String content = "最后一层";
        String result;
        String[] split = module.split("\\.");
        Map<String,Object> resultMap = new HashMap<>();

        for (int i = 0; i < split.length; i++) {
            if (i == split.length-1){
                resultMap.put(split[i],content);
            }else{
                resultMap.put(split[i],new ArrayList<>());
            }
        }

        if (split.length > 1){
            for (int i =  split.length-2; i >= 0 ;i-- ) {
                List<Object> list = (ArrayList)resultMap.get(split[i]);
                Map<String,Object> tempMap = new HashMap();
                tempMap.put(split[i+1],resultMap.get(split[i+1]));
                list.add(tempMap);
            }

            //拼接最后一层
            String str = new Gson().toJson(resultMap.get(split[0]));
            JsonArray jsonArray = new JsonParser().parse(str).getAsJsonArray();
            JsonObject resultObj = new JsonObject();
            resultObj.add(split[0],jsonArray);
            result = new Gson().toJson(resultObj);
        } else {
            JsonObject resultObj = new JsonObject();
            resultObj.addProperty(split[0],resultMap.get(split[0]).toString());
            result = new Gson().toJson(resultObj);
        }

        System.out.println(result);
    }
}