django 百度分页算法
效果如下：
脚本：
1. 脚本结构
2.pagination.py
from django.utils.safestring import mark_safe class Page: ''' current_page: 当前页码 data_count: 数据总个数 per_page_count: 每页展示几个数据 pager_num: 展示页码个数 ''' def __init__(self, current_page, data_count, per_page_count=5, pager_num=6): self.current_page = current_page self.data_count = data_count self.per_page_count = per_page_count self.pager_num = pager_num @property def start(self): return (self.current_page - 1) * self.per_page_count @property def end(self): return self.current_page * self.per_page_count @property def total_count(self): v, y = divmod(self.data_count, self.per_page_count) if y: v += 1 return v def page_str(self, base_url): page_list = [] first = '<li><a class="page" href="%sp=%s">首页</a></li>' % (base_url, 1,) page_list.append(first) if self.total_count < self.pager_num: start_index = 1 end_index = self.total_count + 1 else: if self.current_page <= (self.pager_num + 1) / 2: start_index = 1 end_index = self.pager_num + 1 else: start_index = self.current_page - (self.pager_num - 1) / 2 end_index = self.current_page + (self.pager_num + 1) / 2 if (self.current_page + (self.pager_num - 1) / 2) > self.total_count: end_index = self.total_count + 1 start_index = self.total_count - self.pager_num + 1 if self.current_page == 1: prev = '<li><a class="page" href="javascript:void(0);" style="display: none">上一页</a></li>' else: prev = '<li><a class="page" href="%sp=%s">上一页</a></li>' % (base_url, self.current_page - 1,) page_list.append(prev) for i in range(int(start_index), int(end_index)): if i == self.current_page: temp = '<li class="active"><a class="page " href="%sp=%s">%s</a></li>' % (base_url, i, i) else: temp = '<li ><a class="page" href="%sp=%s">%s</a></li>' % (base_url, i, i) page_list.append(temp) if self.current_page == self.total_count: nex = '<li><a class="page" href="javascript:void(0);" style="display: none">下一页</a></li>' else: nex = '<li><a class="page" href="%sp=%s">下一页</a></li>' % (base_url, self.current_page + 1,) page_list.append(nex) last = '<li><a class="page" href="%sp=%s">尾页</a></li>' % (base_url, self.total_count,) page_list.append(last) total_record = '<span style="display: inline-block;margin-top: 10px;">共%s条记录，共%s页，每页%s条，第%s页</span>' % (self.data_count, self.total_count, self.per_page_count,self.current_page) page_list.append(total_record) page_str = mark_safe("".join(page_list)) return page_str
3. view.py
def page(req): shop_list = ['apple','apple2','apple3','apple4','apple5','apple6','apple7','apple8','apple9'] current_page = req.GET.get('p', 1) current_page = int(current_page) page_obj = pagination.Page(current_page, len(shop_list), 2, 4) data = shop_list[page_obj.start:page_obj.end] print("data:%s"%data) # data:['apple', 'apple2'] page_str = page_obj.page_str('/mytest/page/?') context = {'page_str':page_str,'data':data} return render(req,'page.html',context)
4.html.py
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>分页</title> <link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css"> <script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script> <script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script> <style> ul li{float:left;} </style> </head> <body> <ul> {% for i in data %} <li>{{i}}</li> {% endfor %} </ul> <div style="margin-left: 270px" > <ul class="pagination"> {{page_str}} </ul> </div> </body> </html>
5.url.py
1 from django.conf.urls import url 2 from mytest import views 3 4 urlpatterns = [ 5 # page 6 url(r'page/$', views.page), 7 ]
