Django介绍之分页实例

1. 每页显示的数据条数2. 每页显示页号链接数3. 上一页和下一页4. 首页和末页

 1 from django.core.paginator import Paginator, Page      # 导入django分页模块 2  3  4 class PageInfo(object): 5     def __init__(self, current_page, all_count, base_url, per_page=10, show_page=11): 6         """ 7  8         :param current_page: 当前页 9         :param all_count: 总页数10         :param base_url: 模板11         :param per_page: 每页显示数据条数12         :param show_page: 显示链接页个数13         """14         #若url错误，默认显示第一页（错误类型可能为：空页面编号，非整数型页面编号）15         try:16             self.current_page = int(current_page)17         except Exception as e:18             self.current_page = 119         20         #根据数据库信息条数得出总页数            21         a, b = divmod(all_count, per_page)22         if b:23             a += 124         self.all_page = a   25         26         self.base_url = base_url27         self.per_page = per_page28         self.show_page = show_page29 30     #当前页起始数据id31     def start_data(self):       32         return (self.current_page - 1) * self.per_page33 34     #当前页结束数据id35     def end_data(self):     36         return self.current_page * self.per_page37     38     #动态生成前端html39     def pager(self):40         page_list = []41         half = int((self.show_page - 1)/2)42         #如果：总页数 < show_page，默认显示页数范围为： 1~总页数43         if self.all_page < self.show_page:44             start_page = 145             end_page = self.all_page + 146         #如果：总页数 > show_page47         else:48             #如果：current_page - half <= 0，默认显示页数范围为：1~show_page49             if self.current_page <= half:50                 start_page = 151                 end_page = self.show_page + 152             else:53                 #如果：current_page + half >总页数，默认显示页数范围为：总页数 - show_page ~ 总页数54                 if self.current_page + half > self.all_page:55                     end_page = self.all_page + 156                     start_page = end_page - self.show_page57                 else:58                     start_page = self.current_page - half59                     end_page = self.current_page + half + 160 61         #首页62         first_page = "<li><a href='%s?page=%s'>首页</a>&l<a style="color:transparent">本文来源gao($daima.com搞@代@#码$网</a>t;/li>" %(self.base_url, 1)63         page_list.append(first_page)64 65         #上一页（若当前页等于第一页，则上一页无链接，否则链接为当前页减1）66         if self.current_page <= 1:67             prev_page = "<li><a href='#'>上一页</a></li>"68         else:69             prev_page = "<li><a href='%s?page=%s'>上一页</a></li>" %(self.base_url, self.current_page-1)70         page_list.append(prev_page)71 72         #动态生成中间页数链接73         for i in range(start_page, end_page):74             if i == self.current_page:75                 temp = "<li class='active'><a href='%s?page=%s'>%s</a></li>" %(self.base_url, i, i)76             else:77                 temp = "<li><a href='%s?page=%s'>%s</a></li>" % (self.base_url, i, i)78             page_list.append(temp)79 80         #下一页（若当前页等于最后页，则下一页无链接，否则链接为当前页加1）81         if self.current_page >= self.all_page:82             next_page = "<li><a href='#'>下一页</a></li>"83         else:84             next_page = "<li><a href='%s?page=%s'>下一页</a></li>" %(self.base_url, self.current_page+1)85         page_list.append(next_page)86 87         #末页（若总页数只有一页，则无末页标签）88         if self.all_page > 1:89             last_page = "<li><a href='%s?page=%s'>末页</a></li>" % (self.base_url, self.all_page)90             page_list.append(last_page)91 92         return ''.join(page_list)