自定制分页

pager.py

#_author:wenghao
#date:2019/8/5

class Pagination(object):
    def __init__(self,totalCount,currentPage,perPageItemNum=20,maxPageNum=7):
        # 总页数
        self.total_count=totalCount
        # 当前页
        try:
            self.current_page=int(currentPage)
        except Exception as e:
            self.current_page=1
        # 每页显示的行数（多少条）
        self.per_page_item_num = perPageItemNum
        # 一页最多显示页面
        self.max_page_num = maxPageNum

    def start(self):
        return (self.current_page-1)*self.per_page_item_num

    def end(self):
        return self.current_page*self.per_page_item_num

    # 显示总页数
    @property
    def num_pages(self):
        a,b=divmod(self.total_count,self.per_page_item_num)
        if(b==0):
            return a
        return a+1

    def pager_num_range(self):
        # 页面总数小于一页最多显示页数
        if(self.num_pages<self.max_page_num):
            return range(1,self.num_pages+1)
        part=int(self.max_page_num/2)
        # 当前页面小于中间值part的时候
        if(self.current_page<part):
            return range(1,self.max_page_num+1)
        # 当页面是最后页面小于当前页加上part时
        if(self.current_page+part>self.num_pages):
            return range(self.num_pages-self.max_page_num,self.num_pages+1)
        #当是其他页面时
        return range(self.current_page-part,self.current_page+part+1)



    def page_str(self):
        page_list = []

        first = "<li><a href='/index2.html?p=1'>首页</a></li>"
        page_list.append(first)

        if self.current_page == 1:
            prev = "<li><a href='#'>上一页</a></li>"
        else:
            prev = "<li><a href='/index2.html?p=%s'>上一页</a></li>" %(self.current_page-1,)
        page_list.append(prev)
        for i in self.pager_num_range():
            if i == self.current_page:
                temp = "<li class='active'><a href='/index2.html?p=%s'>%s</a></li>" %(i,i)
            else:
                temp = "<li><a href='/index2.html?p=%s'>%s</a></li>" % (i, i)
            page_list.append(temp)

        if self.current_page == self.num_pages:
            nex = "<li><a href='#'>下一页</a></li>"
        else:
            nex = "<li><a href='/index2.html?p=%s'>下一页</a></li>" % (self.current_page + 1,)
        page_list.append(nex)

        last = "<li><a href='/index2.html?p=%s'>尾页</a></li>" %(self.num_pages,)
        page_list.append(last)

        return ''.join(page_list)


index3.html

<!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" />
</head>
<body>
    <ul>
        {% for row in data %}
            <li>{{ row.name }}-{{ row.age }}</li>
        {% endfor %}
    </ul>

    {% for i in page_obj.pager_num_range %}
        <a href="/index3.html?p={{ i }}">{{ i }}</a>
    {% endfor %}

    <ul class="pagination pagination-sm">
        {{ page_obj.page_str|safe }}
      </ul>

{#    {% if posts.has_previous %}#}
{#        <a href="/index.html?p={{ posts.previous_page_number }}">上一页</a>#}
{#        {% else %}#}
{#        <a href="#">上一页</a>#}
{#    {% endif %}#}
{##}
{#    {% if posts.has_next %}#}
{#        <a href="/index.html?p={{ posts.next_page_number }}">下一页</a>#}
{#    {% endif %}#}
{#    <span>#}
{#        {{ posts.number }}-{{ posts.paginator.num_pages }}#}
{#    </span>#}
</body>
</html>


view

def index3(request):
    from app01.pager1 import Pagination
    current_page=request.GET.get('p')#传入现在是第几页
    page_obj=Pagination(666,current_page)
    data_list=USER_LIST[page_obj.start():page_obj.end()]
    return render(request,'index3.html',{'data':data_list,'page_obj':page_obj})

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