將物件集合轉為欄位值的 list
List<Integer> countList = videoVisitorVoList.stream().map(VideoVisitorCountVo::getUserCount).collect(Collectors.toList());
將物件集合轉為欄位值的 list
List<Integer> countList = videoVisitorVoList.stream().map(VideoVisitorCountVo::getUserCount).collect(Collectors.toList());