前段时间用django给游戏写管理后台，用到了里面的分页组件。看了一下竟然不支持分片，一股脑取出数据，然后分页。感觉太浪费资源，自己就写了一个支持分片的分页类。
先上代码：
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#! /usr/bin/env python
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#coding=utf-8
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#-----------------------------------
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# Name: Core_Lib_Page.py
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# Desc: 分页封装类
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# Author: Lunay Zhao 2013-12-14
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#-----------------------------------
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import math
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import urllib
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class Core_Lib_Page(object):
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_pagebar_html = \
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"""
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-page">
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-totlerecord">%d
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-totlepages">%d/%d%s
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"""
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def __init__(self, url, page, count, perpage, params={}):
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self._url = url
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self._page = page
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self._count = count
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self._perpage = perpage
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self._pagenum = (count / perpage + 1) if count % perpage > 0 else (count / perpage if count / perpage > 0 else 1)
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self._params = params
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self.pagebar = ""
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def showPage(self):
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self.pagebar = ""
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#首页以及上一页
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if self._page == 1:
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self.pagebar += ''+u"首页"+''
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self.pagebar += ''+u"上一页"+''
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else:
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#首页
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self._params["page"] = 1
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params_str = urllib.urlencode(self._params)
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self.pagebar += '+self._url+'?'+params_str+'">' + u"首页" + ''
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#上一页
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self._params["page"] = self._page - 1
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params_str = urllib.urlencode(self._params)
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self.pagebar += '+self._url+'?'+params_str+'">' + u"上一页" + ''
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if self._pagenum == 1:
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self.pagebar += '1'
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else:
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if self._pagenum <= 10:
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self.disposeUrl(1, self._pagenum+1)
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else:
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#继续判断条件
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if self._pagenum - self._page <= 5:
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self.disposeUrl(self._pagenum-10, self._pagenum+1)
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else:
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if self._page > 4:
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show_start = self._page - 4
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else:
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show_start = 1
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self.disposeUrl(show_start, show_start + 10)
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#加上最后一页 以及下一页 标签
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if self._page <> self._pagenum:
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#下一页
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self._params["page"] = self._page + 1
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params_str = urllib.urlencode(self._params)
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self.pagebar += '+self._url+'?'+params_str+'">' + u"下一页" + ''
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#末页
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self._params["page"] = self._pagenum
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params_str = urllib.urlencode(self._params)
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self.pagebar += '+self._url+'?'+params_str+'">' + u"末页" + ''
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else:
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self.pagebar += ''+u"下一页"+''
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self.pagebar += ''+u"末页"+''
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self._pagebar_html = self._pagebar_html % (self._count, self._page, self._pagenum, self.pagebar)
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return self._pagenum, self._pagebar_html
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#处理分页链接以及显示
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def disposeUrl(self, start, end):
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for i in range(start, end):
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if i == self._page:
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self.pagebar += ''+str(i)+''
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else:
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self._params["page"] = i
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params_str = urllib.urlencode(self._params)
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self.pagebar += '+self._url+'?'+params_str+'">' + str(i) + ''
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#用于渲染显示页数及样式 （这个是旧的方法已经废弃,可以用于拓展思路,调用的时候推荐用上面的showPage方法）
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def showPage2(self):
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pagebar = ""
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if self._pagenum <> 1:
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for i in range(1, self._pagenum+1):
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if i == self._page:
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pagebar += ''+str(i)+''
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else:
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if self._page - i >=4 and i <> 1:
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i = self._page - 3
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pagebar += '...'
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else:
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if i >= self._page + 6 and i <> self._pagenum:
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pagebar += '...'
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i = self._pagenum
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self._params["page"] = i
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params_str = urllib.urlencode(self._params)
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pagebar += '+self._url+'?'+params_str+'">' + str(i) + ''
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else:
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pagebar += '1'
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self._pagebar_html = self._pagebar_html % (self._count, self._page, self._pagenum, pagebar)
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return self._pagenum, self._pagebar_html
调用方式如下，发下代码片段。
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from django.shortcuts import render_to_response #模板用
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from django.template import RequestContext
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from django.http import HttpResponse #用于返回原始网页或者JS
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from django.http import HttpResponseRedirect
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from django.conf import settings
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from Core_Lib_Page import Core_Lib_Page
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import redis
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pool = redis.ConnectionPool(host='127.0.0.1', port=6379, db=0)
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r = redis.Redis(connection_pool=pool)
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def date_select(request):
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"""
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每日查询
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"""
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#参数过滤接收
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params = request.REQUEST.copy()
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server = params["server"].strip()
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day = params["day"].strip()
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if not day:
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fm2 = '%Y-%m-%d'
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day = time.strftime("%Y-%m-%d", time.localtime(time.time()))
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try:
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page = int(request.REQUEST.copy()["page"])
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except KeyError:
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page = 1
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except ValueError:
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page = 1
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#server不为空,具体服查询
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perpage = 20
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start = perpage * (page - 1)
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#数据切片尾部
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end = start + perpage - 1
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if server:
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count = r.llen("recharge:server:%s:%s" % (server, day))
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orders_keys = r.lrange("recharge:server:%s:%s" % (server, day), start, end)
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else:
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#全服查询
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#数据总条
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count = r.llen("recharge:day:oids:%s" % day)
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#订单keys内容出炉
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orders_keys = r.lrange("recharge:day:oids:%s" % day, start, end)
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#全平台单日充值订单列表
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orders = []
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for order_key in orders_keys:
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order = r.hgetall("recharge:%s" % order_key)
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order["id"] = order_key
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orders.append(order)
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urlparams = {"server":server, "day":day}
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pagenum, pagebar_html = Core_Lib_Page(request.path, page, count, perpage, urlparams).showPage()
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return render_to_response("admin/into_date_select.html",
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{
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"orders_list" : orders,
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"pagenum" : pagenum,
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"count" : count,
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"page" : page,
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"pagebar_html": pagebar_html,
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"servers" : get_select_servers(),
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}
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)
urlparams 是为了收集参数，然后再传入接下来的分页url中。
数据库我用的是redis.如果用关系型数据库如mysql。也是一样的。
模板我就不发代码了。 可以从这里下载封装类文件：
Core_Lib_Page.zip
看下效果。
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