if !CollectionUtilsisEmptycourseDtoListByNow for CourseDto courseDto courseDtoListByNow CarUser carUser = carUserServicequeryOneCarUserByIdcourseDt

if (!CollectionUtils.isEmpty(courseDtoListByNow)) { for (CourseDto courseDto : courseDtoListByNow) { CarUser carUser = carUserService.queryOneCarUserById(courseDto.getUserId()); courseDto.setCarUserList(Collections.singletonList(carUser)); }

                    log.info("通知");
                    map.put("courseInfos", courseDtoListByNow);
                    return new Result<>(ResultCode.NOTICE_COACH, map);
                } else {
                    log.info("当前无预约学员");
                    //当前无预约学员
                    updateTimeMy.setStartReservationTime(start);
                    updateTimeMy.setEndReservationTime(end);