List進行分頁,並且獲取總頁數

   /**
     * list分頁展示
     */
    public  List<ChecklistDto> getListPage(int page, int pageSize, List<ChecklistDto> list) {
        if (list == null || list.size() == 0) {
            throw new ServiceException("分頁數據不能為空!");
        }
        int totalCount = list.size();
        page = page - 1;
        int fromIndex = page * pageSize;
        //分頁不能大於總數
        if(fromIndex>=totalCount) {
            throw new ServiceException("頁數或分頁大小不正確!");
        }

        int toIndex = ((page + 1) * pageSize);
        if (toIndex > totalCount) {
            toIndex = totalCount;
        }
        return list.subList(fromIndex, toIndex);
    }

    /**
     * 返回總頁數
     */
    public int getPages(List<ChecklistDto> obj,Integer pageSize){
        int count = obj.size()/pageSize;
        if(obj.size() == 0){
            return 0;
        }
        if(obj.size() <= pageSize){
            return 1;
        }else if(count % pageSize == 0){
            return count;
        }else {
            return count + 1;
        }

    }