json 字符串和json对象之间相互转换

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private String getBigDataRecProductIds(Map<String, Object> recRequestParams, List<String> productList,Map<String, String> productScoreMap) {
        String rec_batch_id = "";
        logger.info("获取大数据推荐http post:" + recUrl + "params:" + JSONObject.toJSON(recRequestParams));
        LogUtils.startLogWeb("请求智能推荐城市热销");
        String result = HttpUtils.post(recUrl, recRequestParams, 1000);
        LogUtils.endLogWeb();
        logger.info("获取大数据推荐http post:" + recUrl + "result:" + result);
        JSONObject jsonObject = JSONObject.parseObject(result);
        if (jsonObject == null) {
            return null;
        }
        if (jsonObject.get("rec_batch_id") != null) {
            rec_batch_id = jsonObject.get("rec_batch_id").toString();
            if (jsonObject.get("rec_list") != null) {
                JSONArray jsonArray = (JSONArray) jsonObject.get("rec_list");
                Iterator<Object> iterator = jsonArray.iterator();
                while (iterator.hasNext()) {
                    Map<String, Object> recMap = (Map<String, Object>) iterator.next();
                    if (recMap.get("product_id") != null && recMap.get("category_id") != null && recMap.get("rec_score") != null) {
                        String productId = recMap.get("product_id").toString();
                        String categoryId = recMap.get("category_id").toString();
                        String productScore = recMap.get("rec_score").toString();
                        productList.add(productId);
                        productScoreMap.put(productId + "_" + categoryId, productScore);
                    }
                }
            }
        } else {
            logger.warn("cityHotsaleRec warn未获取到推荐数据 params:" + JSONObject.toJSON(recRequestParams));
            if (jsonObject.get("errorMessage") != null) {
                LogUtils.appendLogWeb("大数据未获取推荐 cause：" + jsonObject.get("errorMessage").toString());
            }
        }
        return rec_batch_id;
    }