django 百度分页算法

效果如下：

django 百度分页算法-LMLPHP

脚本：

　　1. 脚本结构

　　　　 django 百度分页算法-LMLPHP

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

 from django.conf.urls import url

 from mytest import views

 urlpatterns = [

     # page

     url(r'page/$', views.page),

 ]