JSON

//JSONObject解析字符串，转化为对象
CityPartnerDTO dto = JSONObject.parseObject(middlemanDTO.getBizInfo(), CityPartnerDTO.class);
//JSON把对象转化为String
JSON.toJSONString(ids)
 //利用JSON来查看，数据结构
public static void main(String[] args) {
    System.out.println(JSON.toJSONString(RULES));
}

//数组转List
            List<String> openIdList= new ArrayList<>(Arrays.asList(data.getOpenidArray()));