django中有自帶的分頁(yè)模塊Paginator,想Paginator提供對(duì)象的列表，就可以提供每一頁(yè)上對(duì)象的方法。

這里的話不講解Paginator,而是自定義一個(gè)分頁(yè)類(lèi)來(lái)完成需求：

class Pagination(object):   """用于Model字段值的選擇"""     def __init__(self):     pass    @classmethod   def create_pagination(self, from_name='', model_name='',              cur_page=1, start_page_omit_symbol = '...',              end_page_omit_symbol = '...', one_page_data_size=10,              show_page_item_len=9):     """通過(guò)給的model和分頁(yè)參數(shù)對(duì)相關(guān)model進(jìn)行分頁(yè)     Args:       from_name: 導(dǎo)入模塊的 from后面的參數(shù)         from {from_name} import model_name       mode_name: 需要導(dǎo)入的模塊名         from from_name import {model_name}       cur_page: 當(dāng)前顯示的是第幾頁(yè)       start_page_omit_symbol: 超出的頁(yè)數(shù)使用怎么樣的省略號(hào)(前)         ... 2 3 4       end_page_omit_symbol: 超出的頁(yè)數(shù)使用怎么樣的省略號(hào)(后)         1 2 3 4 ...       one_page_data_size: 每一頁(yè)顯示幾行       show_page_item_len: 顯示幾個(gè)能點(diǎn)擊的頁(yè)數(shù)     Return:       pagination: dict           pagination = {             'objs': objs, # 需要顯示model數(shù)據(jù)             'all_obj_counts': all_obj_counts, # 一共多少行數(shù)據(jù)             'start_pos': start_pos, # 數(shù)據(jù)分頁(yè)開(kāi)始的數(shù)據(jù)             'end_pos': end_pos, # 數(shù)據(jù)分頁(yè)結(jié)束的數(shù)據(jù)             'all_page': all_page, # 一共有多少頁(yè)             'cur_page': cur_page, # 當(dāng)前的頁(yè)碼             'pre_page': pre_page, # 上一頁(yè)的頁(yè)碼             'next_page': next_page, # 下一頁(yè)的頁(yè)碼             'page_items': page_items, 能點(diǎn)擊的頁(yè)數(shù)             'start_page_omit_symbol': start_page_omit_symbol, # 開(kāi)始的省略號(hào)             'end_page_omit_symbol': end_page_omit_symbol, # 結(jié)束的省略號(hào)           }      Raise: None     """     # 如果沒(méi)有輸入導(dǎo)入模塊需要的相關(guān)信息直接退出     if not from_name or not model_name:       return None       import_str = 'from {from_name} import {model_name}'.format(                      from_name = from_name,                      model_name = model_name)     # 導(dǎo)入模塊     exec import_str       start_pos = (cur_page - 1) * one_page_data_size      end_pos = start_pos + one_page_data_size        # 查找需要的model數(shù)據(jù)     find_objs_str = ('{model_name}.objects.all()'              '[{start_pos}:{end_pos}]'.format(                         model_name = model_name,                         start_pos = start_pos,                         end_pos = end_pos))     objs = eval(find_objs_str)         # 計(jì)算總共的頁(yè)數(shù)     find_objs_count_str = '{model_name}.objects.count()'.format(                         model_name = model_name)     all_obj_counts = eval(find_objs_count_str)     all_page = all_obj_counts / one_page_data_size     remain_obj = all_obj_counts % one_page_data_size     if remain_obj > 0:       all_page += 1       # 限制當(dāng)前頁(yè)不能小于1和并且大于總頁(yè)數(shù)     cur_page = 1 if cur_page < 1 else cur_page     cur_page = all_page if cur_page > all_page else cur_page       # 獲得顯示頁(yè)數(shù)的最小頁(yè)     start_page = cur_page - show_page_item_len / 2     if start_page > all_page - show_page_item_len:       start_page = all_page - show_page_item_len + 1     start_page = 1 if start_page < 1 else start_page       # 獲得顯示頁(yè)數(shù)的最大頁(yè)     end_page = cur_page + show_page_item_len / 2     end_page = all_page if end_page > all_page else end_page     if end_page < show_page_item_len and all_page > show_page_item_len:       end_page = show_page_item_len       # 獲得上一頁(yè)     pre_page = cur_page - 1     pre_page = 1 if pre_page < 1 else pre_page       # 獲得下一頁(yè)     next_page = cur_page + 1     next_page = all_page if next_page > all_page else next_page       # 處理省略符，是否顯示     if start_page <= 1:       start_page_omit_symbol = ''           if end_page >= all_page:       end_page_omit_symbol = ''       # 創(chuàng)建能點(diǎn)擊的展示頁(yè)碼     page_items = range(start_page, end_page + 1)       pagination = {       'objs': objs,       'all_obj_counts': all_obj_counts,       'start_pos': start_pos,       'end_pos': end_pos,       'all_page': all_page,       'cur_page': cur_page,       'pre_page': pre_page,       'next_page': next_page,       'page_items': page_items,       'start_page_omit_symbol': start_page_omit_symbol,       'end_page_omit_symbol': end_page_omit_symbol,     }       return pagination