网站页面的分页效果可以通过分页器实现
urls.py
from django.contrib import admin
from django.urls import path
from app1 import views
urlpatterns = [
path('admin/', admin.site.urls),
path('index/', views.index),
]
views.py
from django.shortcuts import render, HttpResponse
from app1.models import Book
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
# Create your views here.
# 创建表记录
# def index(request):
# for i in range(100):
# Book.objects.create(title='book_%s' % i, price=i*i)
# 上面这种方式生成100条数据会很慢，因为每次都需要找到表，再插入记录
# 优化：使用bulk_create依次添加所有数据
# def index(request):
# book_list = [] # 存放book对象
# for i in range(100):
# book = Book(title='book_%s' % i, price=i*i)
# book_list.append(book)
# Book.objects.bulk_create(book_list) # 依次插入100条记录
# return render(request, 'index.html')
# 展示
# 普通版
# def index(request):
# book_list = Book.objects.all()
# return render(request, 'index.html', {'book_list': book_list})
# 使用分页器
# def index(request):
# book_list = Book.objects.all()
# # 第一个参数为对象列表，第二个为每页显示的个数
# paginator = Paginator(book_list, 10) # 每页显示10条
# print(paginator.count) # 总数量
# print(paginator.num_pages) # 总页数
# print(paginator.page_range) # 页码的范围
#
# page_01 = paginator.page(1) # 第2页的所有数据对象
# print(page_01.has_next()) # 是否还有下一页
# print(page_01.has_previous()) # 是否还有上一页
# print(page_01.next_page_number()) # 下一页的页码
# # print(page_01.previous_page_number()) # 上一页的页码
#
# return render(request, 'index.html', {'page_01': page_01})
# 地址栏输入参数访问页面
# def index(request):
# book_list = Book.objects.all()
# paginator = Paginator(book_list, 10)
# current_num = int(request.GET.get("page", 1))
# book_list = paginator.page(current_num)
# return render(request, 'index.html', {'book_list': book_list})
# 加入前一页后一页按钮并分页显示
def index(request):
book_list = Book.objects.all()
paginator = Paginator(book_list, 2) # 故意设置每页显示两个，测试分页效果
current_num = 1 # 防止报错
# 捕获异常，防止用户直接在地址栏输入参数造成emptypage错误
try:
current_num = int(request.GET.get("page", 1)) # 获取当前页码
book_list = paginator.page(current_num)
except EmptyPage:
book_list = paginator.page(1) #出错时定位到首页
# 如果页数非常多时，换另外一种显示方式，显示当前页的前5页和后5页，共11页
if paginator.num_pages > 11:
if current_num - 5 < 1: # 如果当前页-5小于1
# page_range显示页面的范围
page_range = range(1, 11) # 展示0~11
elif current_num + 5 > paginator.num_pages: # 当前页+5大于总页数
page_range = range(current_num-5, paginator.num_pages+1)
else:
page_range = range(current_num-5, current_num+6)
else:
page_range = paginator.page_range
return render(request, 'index.html', {'book_list': book_list, 'paginator': paginator, 'current_num': current_num, 'page_range': page_range})
# 能在视图函数里获取到的变量就不要在页面获取
index.html
使用了bootstrap的分页组件，active当前页突出显示，disabled鼠标悬浮时显示禁止（实际上还是可以点，需要自己加入判断）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css">
</head>
<body>
<h3>INDEX</h3>
{#<ul>#}
{# {% for book in book_list %}#}
{# <li>{{ book.title }}-->{{ book.price }}</li>#}
{# {% endfor %}#}
{#</ul>#}
{# 数据展示 #}
<ul>
{% for book in book_list %}
<li>{{ book.title }}-->{{ book.price }}</li>
{% endfor %}
</ul>
{#分页展示#}
<nav aria-label="Page navigation">
<ul class="pagination">
{% if book_list.has_previous %}
{# 有前一页，就-1，否则停留在当前页面 #}
<li>
<a href="?page={{ book_list.previous_page_number }}" aria-label="Previous">
{# 上一页按钮 #}
<span aria-hidden="true">«</span>
</a>
</li>
{% else %}
<li class="disabled">
{# 鼠标悬浮时显示禁止图标 #}
{# 跳转当前页面时，href可以不用写 #}
<a href="" aria-label="Previous">
{# 上一页按钮 #}
<span aria-hidden="true">«</span>
</a>
</li>
{% endif %}
{# 循环展示每一页的页码 #}
{% for i in page_range %}
{% if i == current_num %}
{# 当前页面 #}
<li class="active"><a href="?page={{ i }}">{{ i }}</a></li>
{% else %}
<li><a href="?page={{ i }}">{{ i }}</a></li>
{% endif %}
{% endfor %}
{% if book_list.has_next %}
<li>
<a href="?page={{ book_list.next_page_number }}" aria-label="Next">
{# 下一页按钮 #}
<span aria-hidden="true">»</span>
</a>
</li>
{% else %}
<li class="disabled">
<a href="?page={{ current_num }}" aria-label="Next">
{# 下一页按钮 #}
<span aria-hidden="true">»</span>
</a>
</li>
{% endif %}
</ul>
</nav>>
</body>
</html>
from django.core.paginator import Paginator, EmptyPage, PageNotAnIntegerbook_list = Book.objects.all()
paginator = Paginator(book_list,10) # 每页显示10条
print(paginator.count) #数据总数 100
print(paginator.num_pages) # #总页数 10
print(paginator.page_range) #页码的列表 range(1, 11)
page_01 = paginator.page(2) #第2页的所有数据对象
print(page_01.has_next()) #是否有下一页
print(page_01.has_previous()) #是否有上一页
print(page_01.next_page_number()) #下一页的页码
print(page_01.previous_page_number()) #上一页的页码 原文：https://www.cnblogs.com/zzliu/p/10659729.html