[Python知识库]Python自定义分页组件

使用Python自定义分页组件
本博客转自 Iced的博客 http://blog.icedll.xyz/index.php/archives/12/

class PageInfo(object):
    def __init__(self,current_page,all_count,per_page,base_url,show_page):
        """
        :param current_page: 当前页页码
        :param all_count: 数据总行数
        :param per_page: 每页显示行数
        :param base_url: 分页页面的url
        :param show_page: 页面上显示的页码数
        """
        try:
            self.current_page = int(current_page)
        except Exception as e:
            self.current_page = 1
        self.per_page = per_page

        a,b = divmod(all_count,per_page)
        if b:
            a = a+1
        self.all_pager = a
        self.show_page = show_page
        self.base_url = base_url
    def start(self):
        return (self.current_page-1) * self.per_page

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

    def pager(self):
        page_list = []

        half = int((self.show_page-1)/2)

        #使页面上能显示的页面为固定值，且前和后均不能超过总页码
        #如果数据总页数 < 11
        if self.all_pager < self.show_page:
            begin = 1
            stop = self.all_pager + 1
        #总页数 > 11
        else:
            #如果当前页 <= 5，永远显示1,11
            if self.current_page <= half:
                begin = 1
                stop = self.show_page + 1
            else:
                if self.current_page + half > self.all_pager:
                    begin = self.all_pager - self.show_page + 1
                    stop = self.all_pager + 1
                else:
                    begin = self.current_page - half
                    stop = self.current_page + half + 1
        # begin = self.current_page-half
        # stop = self.current_page+half+1
        front = "<li><a href='%s?page=%s'>首页</a></li>"%(self.base_url,1)
        page_list.append(front)
        if self.current_page <= 1:
            prev = "<li><a href='#'>上一页</a></li>"
        else:
            prev = "<li><a href='%s?page=%s'>上一页</a></li>"%(self.base_url,self.current_page-1)
        page_list.append(prev)

        for i in range(begin,stop):
            if i == self.current_page:
                temp = "<li class='active'><a href='%s?page=%s'>%s</a></li>"%(self.base_url,i,i,)
            else:
                temp = "<li><a href='%s?page=%s'>%s</a></li>" % (self.base_url,i, i,)
            page_list.append(temp)

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

        back = "<li><a href='%s?page=%s'>尾页</a></li>"%(self.base_url,self.all_pager)
        page_list.append(back)
        return ''.join(page_list)

此组件为个人在实践项目中所开发的小组件，不同于模板引擎的分页组件。