List进行分页,并且获取总页数

   /**
     * list分页展示
     */
    public  List<ChecklistDto> getListPage(int page, int pageSize, List<ChecklistDto> list) {
        if (list == null || list.size() == 0) {
            throw new ServiceException("分页数据不能为空!");
        }
        int totalCount = list.size();
        page = page - 1;
        int fromIndex = page * pageSize;
        //分页不能大于总数
        if(fromIndex>=totalCount) {
            throw new ServiceException("页数或分页大小不正确!");
        }

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

    /**
     * 返回总页数
     */
    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;
        }

    }