Json转化

    public static PromoteActivityExt getExtByActivityDO(ActivityDO activityDO){
        if(null==activityDO){
            return null;
        }
        PromoteActivityExt activityExt = JSON.parseObject(activityDO.getFeature(), PromoteActivityExt.class);
        return activityExt;
    }

2、转列表：

  List<ProjectRestDTO> list = JSONObject.parseArray(getlowestPriceStr(), ProjectRestDTO.class);
        System.out.println(list.toString());

3、HashMap: json 转HashMap

 String operationParam = detailDO.getOperationParam();
                HashMap<String,String> hashMap = JSON.parseObject(operationParam, HashMap.class);
                String discountValue = hashMap.get(OperationParamEnum.DISCOUNT_VALUE.getKey());
                String brokerageRate = hashMap.get(OperationParamEnum.BROKERAGE_RATE.getKey());
                channelInfo.setDiscount(Double.valueOf(discountValue));
                channelInfo.setBrokerageRate(Integer.valueOf(brokerageRate));

 HashMap转json转化：

 Map paramMap = new HashMap();
            paramMap.put(OperationParamEnum.DISCOUNT_VALUE.getKey(),String.valueOf(channelInfo.getDiscount()));
            paramMap.put(OperationParamEnum.BROKERAGE_RATE.getKey(),String.valueOf(channelInfo.getBrokerageRate()));
            activityDetailDO.setOperationParam(JSON.toJSONString(paramMap));