Python分页组件

分页组件的实现：

+ View Code?

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class Pagination(object):     """     自定义分页     """     def __init__(self,current_page,total_count,base_url,params,per_page_count=10,max_pager_count=11):         try:             current_page = int(current_page)         except Exception as e:             current_page = 1         if current_page <=0:             current_page = 1         self.current_page = current_page         # 数据总条数         self.total_count = total_count           # 每页显示10条数据         self.per_page_count = per_page_count           # 页面上应该显示的最大页码         max_page_num, div = divmod(total_count, per_page_count)         if div:             max_page_num += 1         self.max_page_num = max_page_num           # 页面上默认显示11个页码（当前页在中间）         self.max_pager_count = max_pager_count         self.half_max_pager_count = int((max_pager_count - 1) / 2)           # URL前缀         self.base_url = base_url           # request.GET         import copy         params = copy.deepcopy(params)         params._mutable = True         # 包含当前列表页面所有的搜索条件         # {source:[2,], status:[2], gender:[2],consultant:[1],page:[1]}         # self.params[page] = 8         # self.params.urlencode()         # source=2&status=2&gender=2&consultant=1&page=8         # href="/hosts/?source=2&status=2&gender=2&consultant=1&page=8"         # href="%s?%s" %(self.base_url,self.params.urlencode())         self.params = params       @property         这个property 的作用是，在调用的时候不用加上括号，直接使用self.start即可     def start(self):         return (self.current_page - 1) * self.per_page_count       @property     def end(self):         return self.current_page * self.per_page_count       def page_html(self):         # 如果总页数 <= 11         if self.max_page_num <= self.max_pager_count:             pager_start = 1             pager_end = self.max_page_num         # 如果总页数 > 11         else:             # 如果当前页 <= 5             if self.current_page <= self.half_max_pager_count:                 pager_start = 1                 pager_end = self.max_pager_count             else:                 # 当前页 + 5 > 总页码                 if (self.current_page + self.half_max_pager_count) > self.max_page_num:                     pager_end = self.max_page_num                     pager_start = self.max_page_num - self.max_pager_count + 1   #倒这数11个                 else:                     pager_start = self.current_page - self.half_max_pager_count                     pager_end = self.current_page + self.half_max_pager_count           page_html_list = []         # {source:[2,], status:[2], gender:[2],consultant:[1],page:[1]}         # 首页         self.params['page'] = 1         first_page = '<li><a href="%s?%s">首页</a></li>' % (self.base_url,self.params.urlencode(),)         page_html_list.append(first_page)           # 上一页         self.params["page"] = self.current_page - 1         if self.params["page"] < 1:             pervious_page = '<li class="disabled"><a href="%s?%s" aria-label="Previous">上一页</span></a></li>' % (             self.base_url, self.params.urlencode())         else:             pervious_page = '<li><a href = "%s?%s" aria-label = "Previous" >上一页</span></a></li>' % (             self.base_url, self.params.urlencode())         page_html_list.append(pervious_page)           # 中间页码         for i in range(pager_start, pager_end + 1):             self.params['page'] = i             if i == self.current_page:                 temp = '<li class="active"><a href="%s?%s">%s</a></li>' % (self.base_url,self.params.urlencode(), i,)             else:                 temp = '<li><a href="%s?%s">%s</a></li>' % (self.base_url,self.params.urlencode(), i,)             page_html_list.append(temp)           # 下一页         self.params["page"] = self.current_page + 1         if self.params["page"] > self.max_page_num:             self.params["page"] = self.current_page             next_page = '<li class="disabled"><a href = "%s?%s" aria-label = "Next">下一页</span></a></li >' % (             self.base_url, self.params.urlencode())         else:             next_page = '<li><a href = "%s?%s" aria-label = "Next">下一页</span></a></li>' % (             self.base_url, self.params.urlencode())         page_html_list.append(next_page)           # 尾页         self.params['page'] = self.max_page_num         last_page = '<li><a href="%s?%s">尾页</a></li>' % (self.base_url, self.params.urlencode(),)         page_html_list.append(last_page)           return ''.join(page_html_list)

分页组件的使用

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""" 自定义分页组件的使用方法：     pager_obj = Pagination(request.GET.get('page',1),len(HOST_LIST),request.path_info,request.GET)     host_list = HOST_LIST[pager_obj.start:pager_obj.end]     html = pager_obj.page_html()     ----->这里返回的是page_html_list     return render(request,'hosts.html',{'host_list':host_list,"page_html":html}) """

 

按照上面我们在前端之间传入数据到py文件中

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1	pager_obj = Pagination(request.GET.get('page',1),len(HOST_LIST),request.path_info,request.GET)

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1	request.GET.get('page',1)    ------》   current_page

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1	len(HOST_LIST)　　　　　　　　　------》   total_count(这里要是数据库的话，我们可以取总条数)

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1	request.path_info            ------》   base_Url

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1	request.GET　　　　　　　　　　　------》　 params

 

原文章转自：

http://www.cnblogs.com/haiyan123/p/8065353.html