Django的分页器
views
from django.shortcuts import render,HttpResponse,redirect from app01.models import * from django.core.paginator import Paginator # Create your views here. def index(request): # 往数据库表中插入数据 # book_list=[] # for i in range(100): # book_obj = Book(title="Book_%s"%i,price=i*i) # book_list.append(book_obj) # Book.objects.bulk_create(book_list) # Book_all = Book.objects.all() book_list = Book.objects.all() paginator = Paginator(book_list, 5) c_page = request.GET.get("page", 1) # print("count", paginator.count) 数据总数 # print("num_pages", paginator.num_pages) 总页数 # print("page_range", paginator.page_range) 页码的列表try: page = paginator.page(c_page) except: page = paginator.page(1) #第一页的page对象 # print(page.has_next()) #是否有下一页 # print(page.next_page_number()) #下一页页码 # print(page.has_previous()) #是否有上一页 # print(page.previous_page_number()) #上一页页码 return render(request,"index.html",{"page":page,"paginator":paginator,"c_page":int(c_page)})
templates
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous"> <title>index</title> </head> <body> {% csrf_token %} <ul> {% for book in page.object_list %} <p>{{ book.title }}:{{ book.price }}</p> {% endfor %} </ul> <nav aria-label="Page navigation"> <ul class="pagination"> {######################### 上一页#########################} {% if page.has_previous %} <li><a href="?page={{ c_page|add:-1 }}">上一页</a></li> {% else %} <li class="disabled"><a aria-label="Next">上一页</a></li> {% endif %} {######################### 页码#########################} {% for num in pageRange %} {% if c_page == num %} <li class="active"><a href="?page{{ num }}">{{ num }}</a></li> {% else %} <li><a href="?page={{ num }}">{{ num }}</a></li> {% endif %} {% endfor %} {######################### 下一页#########################} {% if page.has_next %} <li><a href="?page={{ c_page|add:+1 }}">下一页</a></li> {% else %} <li class="disabled"><a aria-label="Next">下一页</a></li> {% endif %} </ul> </nav> </body> </html>
如果页数非常多时，换另外一种方式
def index(request): book_list=Book.objects.all() paginator = Paginator(book_list, 15) page = request.GET.get('page',1) currentPage=int(page) if paginator.num_pages>30: if currentPage-5<1: pageRange=range(1,11) elif currentPage+5>paginator.num_pages: pageRange=range(currentPage-5,paginator.num_pages+1) else: pageRange=range(currentPage-5,currentPage+5) else: pageRange=paginator.page_range try: print(page) book_list = paginator.page(page) except PageNotAnInteger: book_list = paginator.page(1) except EmptyPage: book_list = paginator.page(paginator.num_pages) return render(request,"index.html",locals())
自定义分页器
""" 分页组件使用示例： obj = Pagination(request.GET.get('page',1),len(USER_LIST),request.path_info) page_user_list = USER_LIST[obj.start:obj.end] page_html = obj.page_html() return render(request,'index.html',{'users':page_user_list,'page_html':page_html}) """ class Pagination(object): def __init__(self,current_page,all_count,base_url,per_page_num=2,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 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 self.pager_count_half = int((pager_count - 1) / 2) @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11/2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_end = self.all_pager + 1 pager_start = self.all_pager - self.pager_count + 1 else: pager_start = self.current_page - self.pager_count_half pager_end = self.current_page + self.pager_count_half + 1 page_html_list = [] first_page = '<li><a href="%s?page=%s">首页</a></li>' % (self.base_url,1,) page_html_list.append(first_page) if self.current_page <= 1: prev_page = '<li class="disabled"><a href="#">上一页</a></li>' else: prev_page = '<li><a href="%s?page=%s">上一页</a></li>' % (self.base_url,self.current_page - 1,) page_html_list.append(prev_page) for i in range(pager_start, pager_end): if i == self.current_page: temp = '<li class="active"><a href="%s?page=%s">%s</a></li>' % (self.base_url,i, i,) else: temp = '<li><a href="%s?page=%s">%s</a></li>' % (self.base_url,i, 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: next_page = '<li><a href="%s?page=%s">下一页</a></li>' % (self.base_url,self.current_page + 1,) page_html_list.append(next_page) last_page = '<li><a href="%s?page=%s">尾页</a></li>' % (self.base_url,self.all_pager,) page_html_list.append(last_page) return ''.join(page_html_list)