Django中怎么实现一个分页功能
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HTML代码
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <link rel="stylesheet" href="/static/bootstrap-3.3.7/dist/css/bootstrap.css"> <link rel="stylesheet" href="/templates/bootstrap-3.3.7/dist/css/bootstrap-theme.css"> <script src="/static/jquery3.js"></script> <script src="/static/bootstrap-3.3.7/dist/js/bootstrap.js"></script> </head> <body> <h2>图书列表</h2> <table border="1" class="table table-bordered table-hover"> <thead> <tr> <th>ID</th> <th>名字</th> <th>出版社</th> <th>价格</th> </tr> </thead> <tbody> {% for book in book_list %} <tr> <td>{{ book.id }}</td> <td>{{ book.title }}</td> <td> {{ book.publisher.name }} </td> <td>{{ book.price }}</td> </tr> {% endfor %} </tbody> </table> {#重点位置#} <nav aria-label="Page navigation"> <ul class="pagination"> <li> <a href="/ormtest/book/?page=1" aria-label="Previous"> <span aria-hidden="true">首页</span> </a> </li> {{ page_html|safe }} <li> <a href="/ormtest/book/?page={{ total_page }}" aria-label="Next"> <span aria-hidden="true">尾页</span> </a> </li> </ul> </nav> </body> </html>
Python 代码
def book_list(request): # 每一页显示数量 per_page = 7 # 总数据 total_count = models.Book.objects.all().count() # 总共需要多少页显示数据 total_page, m = divmod(total_count, per_page) if m: total_page += 1 # 从URL中取参数,当没有page时,page_num为1,当page_num大于总页数时,赋于最后一页,当page为字符时,异常出错时,为1值 try: page_num = request.GET.get("page") page_num = int(page_num) if page_num > total_page: page_num = total_page elif page_num < 1: page_num =1 except Exception as e: page_num = 1 #定义两个变量,截取数据 data_start = (page_num-1)*per_page data_end = page_num*per_page #页面上总共展示多少页面 max_page =11 if total_page < max_page: max_page = total_page half_max_page = max_page//2 #结果为5,即左右各5页 # 页面上展示的面码从那儿结束 page_end = page_num + half_max_page #页面上展示的页码从那儿开始 page_start = page_num - half_max_page #如果当前面减一半比1还小 if page_start <= 1: page_start = 1 page_end = max_page #如果当前页大于总页数 if page_end >= total_page: page_end = total_page page_start = total_page-max_page+1 #在后台拼接分页的html html_str_list = [] for i in range(page_start, page_end+1): #为当前加一个active样式 if i == page_num: tmp = '<li class=active><a href="/ormtest/book/?page={0}">{0}</a></li>'.format(i) else: tmp = '<li><a href="/ormtest/book/?page={0}">{0}</a></li>'.format(i) html_str_list.append(tmp) #将所有li的html文件拼接连接成一块 page_html = "".join(html_str_list) #print(page_html) all_book = models.Book.objects.all()[data_start:data_end] return render(request,"book.html",{"book_list":all_book,"page_html":page_html,"total_page":total_page})
展示效果
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