参考： https://www.cnblogs.com/liwenzhou/p/8343243.html
一、过程
1、批量添加数据，显示在前端
2、通过url控制页面的跳转
3、通过标签控制页面的跳转
4、将标签的数量固定，如 5 9 11
5、解决最小和最大标签页的问题
6、添加最后一页和第一页
7、添加下一页
8、解决下一页，最小和最大的问题
9、解决总页数没有达到标签数量的问题
二、代码
def publisher_list(request): # 从URL中取当前访问的页码数 try: current_page = int(request.GET.get('page')) except Exception as e: # 取不到或者页码数不是数字都默认展示第1页 current_page = 1 # 总数据量 total_count = models.Publisher.objects.count() # 定义每页显示多少条数据 per_page = 10 # 计算出总页码数 total_page, more = divmod(total_count, per_page) if more: total_page += 1 # 定义页面上最多显示多少页码(为了左右对称，一般设为奇数) max_show = 11 half_show = max_show // 2 # 计算一下页面显示的页码范围 if total_page <= max_show: # 总页码数小于最大显示页码数 page_start = 1 page_end = total_page elif current_page + half_show >= total_page: # 右边越界 page_end = total_page page_start = total_page - max_show elif current_page - half_show <= 1: # 左边越界 page_start = 1 page_end = max_show else: # 正常页码区间 page_start = current_page - half_show page_end = current_page + half_show # 数据索引起始位置 data_start = (current_page-1) * per_page data_end = current_page * per_page publisher_list = models.Publisher.objects.all()[data_start:data_end] # 生成页面上显示的页码 page_html_list = [] page_html_list.append('<nav aria-label="Page navigation"><ul class="pagination">') # 加首页 first_li = '<li><a href="/publisher_list/?page=1">首页</a></li>' page_html_list.append(first_li) # 加上一页 if current_page == 1: prev_li = '<li><a href="#"><span aria-hidden="true">«</span></a></li>' else: prev_li = '<li><a href="/publisher_list/?page={}"><span aria-hidden="true">«</span></a></li>'.format(current_page - 1) page_html_list.append(prev_li) for i in range(page_start, page_end + 1): if i == current_page: li_tag = '<li class="active"><a href="/publisher_list/?page={0}">{0}</a></li>'.format(i) else: li_tag = '<li><a href="/publisher_list/?page={0}">{0}</a></li>'.format(i) page_html_list.append(li_tag) # 加下一页 if current_page == total_page: next_li = '<li><a href="#"><span aria-hidden="true">»</span></a></li>' else: next_li = '<li><a href="/publisher_list/?page={}"><span aria-hidden="true">»</span></a></li>'.format(current_page + 1) page_html_list.append(next_li) # 加尾页 page_end_li = '<li><a href="/publisher_list/?page={}">尾页</a></li>'.format(total_page) page_html_list.append(page_end_li) page_html_list.append('</ul></nav>') page_html = "".join(page_html_list) return render(request, "publisher_list.html", {"publisher_list": publisher_list, "page_html": page_html})
class Pagination(object): """自定义分页（Bootstrap版）""" def __init__(self, current_page, total_count, base_url, per_page=10, max_show=11): """ :param current_page: 当前请求的页码 :param total_count: 总数据量 :param base_url: 请求的URL :param per_page: 每页显示的数据量，默认值为10 :param max_show: 页面上最多显示多少个页码，默认值为11 """ try: self.current_page = int(current_page) except Exception as e: # 取不到或者页码数不是数字都默认展示第1页 self.current_page = 1 # 定义每页显示多少条数据 self.per_page = per_page # 计算出总页码数 total_page, more = divmod(total_count, per_page) if more: total_page += 1 self.total_page = total_page # 定义页面上最多显示多少页码(为了左右对称，一般设为奇数) self.max_show = max_show self.half_show = max_show // 2 self.base_url = base_url @property def start(self): return (self.current_page-1) * self.per_page @property def end(self): return self.current_page * self.per_page def page_html(self): # 计算一下页面显示的页码范围 if self.total_page <= self.max_show: # 总页码数小于最大显示页码数 page_start = 1 page_end = self.total_page elif self.current_page + self.half_show >= self.total_page: # 右边越界 page_end = self.total_page page_start = self.total_page - self.max_show elif self.current_page - self.half_show <= 1: # 左边越界 page_start = 1 page_end = self.max_show else: # 正常页码区间 page_start = self.current_page - self.half_show page_end = self.current_page + self.half_show # 生成页面上显示的页码 page_html_list = [] page_html_list.append('<nav aria-label="Page navigation"><ul class="pagination">') # 加首页 first_li = '<li><a href="{}?page=1">首页</a></li>'.format(self.base_url) page_html_list.append(first_li) # 加上一页 if self.current_page == 1: prev_li = '<li><a href="#"><span aria-hidden="true">«</span></a></li>' else: prev_li = '<li><a href="{}?page={}"><span aria-hidden="true">«</span></a></li>'.format( self.base_url, self.current_page - 1) page_html_list.append(prev_li) for i in range(page_start, page_end + 1): if i == self.current_page: li_tag = '<li class="active"><a href="{0}?page={1}">{1}</a></li>'.format(self.base_url, i) else: li_tag = '<li><a href="{0}?page={1}">{1}</a></li>'.format(self.base_url, i) page_html_list.append(li_tag) # 加下一页 if self.current_page == self.total_page: next_li = '<li><a href="#"><span aria-hidden="true">»</span></a></li>' else: next_li = '<li><a href="{}?page={}"><span aria-hidden="true">»</span></a></li>'.format( self.base_url, self.current_page + 1) page_html_list.append(next_li) # 加尾页 page_end_li = '<li><a href="{}?page={}">尾页</a></li>'.format(self.base_url, self.total_page) page_html_list.append(page_end_li) page_html_list.append('</ul></nav>') return "".join(page_html_list)
def publisher_list(request): # 从URL中取当前访问的页码数 current_page = int(request.GET.get('page')) # 比len(models.Publisher.objects.all())更高效 total_count = models.Publisher.objects.count() page_obj = Pagination(current_page, total_count, request.path_info) data = models.Publisher.objects.all()[page_obj.start:page_obj.end] page_html = page_obj.page_html() return render(request, "publisher_list.html", {"publisher_list": data, "page_html": page_html})
class Pagination(object): def __init__(self, current_page, all_count, base_url, params, per_page_num=8, pager_count=11, ): """ 封装分页相关数据 :param current_page: 当前页 :param all_count: 数据库中的数据总条数 :param per_page_num: 每页显示的数据条数 :param params: request.GET :param base_url: 分页中显示的URL前缀 :param pager_count: 最多显示的页码个数 """ try: current_page = int(current_page) except Exception as e: current_page = 1 if current_page < 1: current_page = 1 self.current_page = current_page self.all_count = all_count self.per_page_num = per_page_num self.base_url = base_url # 总页码 all_pager, tmp = divmod(all_count, per_page_num) if tmp: all_pager += 1 self.all_pager = all_pager self.pager_count = pager_count # 最多显示页码数 self.pager_count_half = int((pager_count - 1) / 2) import copy params = copy.deepcopy(params) params._mutable = True self.params = params # self.params : {"page":77,"title":"python","nid":1} @property def start(self): return (self.current_page - 1) * self.per_page_num @property def end(self): return self.current_page * self.per_page_num def page_html(self): # 如果总页码 < 11个： if self.all_pager <= self.pager_count: pager_start = 1 pager_end = self.all_pager + 1 # 总页码 > 11 else: # 当前页如果<=页面上最多显示(11-1)/2个页码 if self.current_page <= self.pager_count_half: pager_start = 1 pager_end = self.pager_count + 1 # 当前页大于5 else: # 页码翻到最后 if (self.current_page + self.pager_count_half) > self.all_pager: pager_start = self.all_pager - self.pager_count + 1 pager_end = self.all_pager + 1 else: pager_start = self.current_page - self.pager_count_half pager_end = self.current_page + self.pager_count_half + 1 page_html_list = [] self.params["page"] = 1 first_page = '<li><a href="%s?%s">首页</a></li>' % (self.base_url, self.params.urlencode(),) page_html_list.append(first_page) if self.current_page <= 1: prev_page = '<li class="disabled"><a href="#">上一页</a></li>' else: self.params["page"] = self.current_page - 1 prev_page = '<li><a href="%s?%s">上一页</a></li>' % (self.base_url, self.params.urlencode(),) page_html_list.append(prev_page) for i in range(pager_start, pager_end): # self.params : {"page":77,"title":"python","nid":1} self.params["page"] = i # {"page":72,"title":"python","nid":1} if i == self.current_page: temp = '<li class="active"><a href="%s?%s">%s</a></li>' % (self.base_url, self.params.urlencode(), i,) else: temp = '<li><a href="%s?%s">%s</a></li>' % (self.base_url, self.params.urlencode(), i,) page_html_list.append(temp) if self.current_page >= self.all_pager: next_page = '<li class="disabled"><a href="#">下一页</a></li>' else: self.params["page"] = self.current_page + 1 next_page = '<li><a href="%s?%s">下一页</a></li>' % (self.base_url, self.params.urlencode(),) page_html_list.append(next_page) self.params["page"] = self.all_pager last_page = '<li><a href="%s?%s">尾页</a></li>' % (self.base_url, self.params.urlencode(),) page_html_list.append(last_page) return ''.join(page_html_list)