1 class Pagination:
2 def __init__(self, current_page_num, all_count, request, per_page_num=10, pager_count=5):
3 """
4
5 :param current_page_num: 当前页码数
6 :param all_count: 分页数据总条数
7 :param request:
8 :param per_page_num: 每页显示的数据条数
9 :param pager_count: 最多显示的页码个数
10 """
11 try:
12 current_page_num = int(current_page_num)
13 except Exception as e:
14 current_page_num = 1
15 if current_page_num < 1:
16 current_page_num = 1
17 self.current_page_num = current_page_num
18 self.all_count = all_count
19 self.per_page_num = per_page_num
20
21 # 实际总页码
22 all_pager, tmp = divmod(all_count, per_page_num)
23 if tmp:
24 all_pager += 1
25 self.all_pager = all_pager
26
27 self.pager_count = pager_count
28 self.pager_count_half = int((pager_count - 1) / 2)
29 import copy
30 self.params=copy.deepcopy(request.GET)
31
32
33 @property
34 def start(self):
35 return (self.current_page_num - 1) * self.per_page_num
36
37 @property
38 def end(self):
39 return self.current_page_num * self.per_page_num
40
41 def page_html(self):
42 # 如果总页数<11:
43 if self.all_pager < self.pager_count:
44 pager_start = 1
45 pager_end = self.all_pager + 1
46 # 总页码>11
47 else:
48 # 当前页码<=页面上最多显示11/2个页码
49 if self.current_page_num <= self.pager_count_half:
50 pager_start = 1
51 pager_end = self.pager_count + 1
52
53 else:
54 # 当前页>总页数
55 if (self.current_page_num + self.pager_count_half) > self.all_pager:
56 pager_start = self.all_pager - self.pager_count + 1
57 pager_end = self.all_pager + 1
58 # # 当前页<总页数
59 else:
60 pager_start = self.current_page_num - self.pager_count_half
61 pager_end = self.current_page_num + self.pager_count_half + 1
62 page_html_list = []
63 first_page = '<li><a href="?page=%s">首页</a></li>' % (1,)
64 page_html_list.append(first_page)
65 # 当前页码是否小于1
66 if self.current_page_num <= 1:
67 prev_page = '<li class="disabled"><a href="#">上一页</a></li>'
68 else:
69 prev_page = '<li><a href="?page=%s">上一页</a></li>' % (self.current_page_num - 1,)
70 page_html_list.append(prev_page)
71 # 循环添加a标签
72 for i in range(pager_start, pager_end): #
73 self.params['page']=i
1 from django.shortcuts import render, HttpResponse
2 from app01.models import Book
3
4
5 # Create your views here.
6 def index(request):
7 from app01.page import Pagination
8 # 取到当前页码
9 current_page_num = request.GET.get('page')
10 # 取到所有书籍
11 book_list = Book.objects.all()
12 # 实例化一个对象
13 pagination = Pagination(current_page_num, book_list.count(), request, )
14 # 切片选中
15 book_list=book_list[pagination.start:pagination.end]
16
17
18 return render(request,'INDEX.html',locals())
1 <!DOCTYPE html>
2 <html lang="zh-CN">
3 <head>
4 <meta charset="UTF-8">
5 <title>Title</title>
6 <meta name="viewport" content="width=device-width, initial-scale=1">
7 <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
8 <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
9 </head>
10 <body>
11
12 <ul>
13 {% for book in book_list %}
14 <li>{{ book.title }} ---- {{ book.price }}</li>
15 {% endfor %}
16 </ul>
17
18 <nav aria-label="Page navigation">
19 <ul class="pagination">
20 {{ pagination.page_html|safe }}
21 </ul>
22 </nav>
23
24
25 </body>
26 </html>
74 # 如果当前循环元素是当前页码给当前页码加css
75 if i == self.current_page_num:
76 temp = '<li class="active"><a href="?%s">%s</a></li>' % (self.params.urlencode(), i)
77 else:
78 temp = '<li><a href="?%s">%s</a></li>' % (self.params.urlencode(), i)
79 page_html_list.append(temp)
80 if self.current_page_num >= self.all_pager:
81 next_page = '<li class="disabled"><a href="#">下一页</a></li>'
82 else:
83 next_page = '<li><a href="?page=%s">下一页</a></li>' % (self.current_page_num + 1,)
84 page_html_list.append(next_page)
85 last_page = '<li><a href="?page=%s">尾页</a></li>' % (self.all_pager,)
86 page_html_list.append(last_page)
87
88 return ''.join(page_html_list)
