Django框架 Pagination分页实现代码实例

data = []
 
for i in range(1, 302):
  tmp = {"id": i, "name": "alex-{}".format(i)}
  data.append(tmp)
 
print(data)
def user_list(request):
 
  # user_list = data[0:10]
  # user_list = data[10:20]
  try:
    current_page = int(request.GET.get("page"))
  except Exception as e:
    current_page = 1
 
  per_page = 10
 
  # 数据总条数
  total_count = len(data)
  # 总页码
  total_page, more = divmod(total_count, per_page)
  if more:
    total_page += 1
 
  # 页面最多显示多少个页码
  max_show = 11
  half_show = int((max_show-1)/2)
 
  if current_page <= half_show:
    show_start = 1
    show_end = max_show
  else:
    if current_page + half_show >= total_page:
      show_start = total_page - max_show
      show_end = total_page
    else:
      show_start = current_page - half_show
      show_end = current_page + half_show
 
  # 数据库中获取数据
  data_start = (current_page - 1) * per_page
  data_end = current_page * per_page
 
  user_list = data[data_start:data_end]
 
  # 生成页面上显示的页码
  page_html_list = []
  # 加首页
  first_li = '<li><a href="/user_list/?page=1" rel="external nofollow" >首页</a></li>'
  page_html_list.append(first_li)
  # 加上一页
  if current_page == 1:
    prev_li = '<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>'
  else:
    prev_li = '<li><a href="/user_list/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>'.format(current_page - 1)
  page_html_list.append(prev_li)
  for i in range(show_start, show_end+1):
    if i == current_page:
      li_tag = '<li class="active"><a href="/user_list/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>'.format(i)
    else:
      li_tag = '<li><a href="/user_list/?page={0}" rel="external nofollow" rel="external nofollow" >{0}</a></li>'.format(i)
    page_html_list.append(li_tag)
 
  # 加下一页
  if current_page == total_page:
    next_li = '<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>'
  else:
    next_li = '<li><a href="/user_list/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>'.format(current_page+1)
  page_html_list.append(next_li)
 
  # 加尾页
  page_end_li = '<li><a href="/user_list/?page={}" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a></li>'.format(total_page)
  page_html_list.append(page_end_li)
 
  page_html = "".join(page_html_list)
 
  return render(request, "user_list.html", {"user_list": user_list, "page_html": page_html})

class Pagination(object):
  def __init__(self, current_page, total_count, base_url, per_page=10, max_show=11):
    """
    :param current_page: 当前页
    :param total_count: 数据库中数据总数
    :param per_page: 每页显示多少条数据
    :param max_show: 最多显示多少页
    """
    try:
      current_page = int(current_page)
    except Exception as e:
      current_page = 1
 
    self.current_page = current_page
    self.total_count = total_count
    self.base_url = base_url
    self.per_page = per_page
    self.max_show = max_show
 
    # 总页码
    total_page, more = divmod(total_count, per_page)
    if more:
      total_page += 1
     
    half_show = int((max_show - 1) / 2)
    self.half_show = half_show
    self.total_page = total_page
 
  @property
  def start(self):
    return (self.current_page - 1) * self.per_page
 
  @property
  def end(self):
    return self.current_page * self.per_page
 
  def page_html(self):
 
    if self.current_page <= self.half_show:
      show_start = 1
      show_end = self.max_show
    else:
      if self.current_page + self.half_show >= self.total_page:
        show_start = self.total_page - self.max_show
        show_end = self.total_page
      else:
        show_start = self.current_page - self.half_show
        show_end = self.current_page + self.half_show
 
        # 生成页面上显示的页码
    page_html_list = []
    # 加首页
    first_li = '<li><a href="{}?page=1" rel="external nofollow" >首页</a></li>'.format(self.base_url)
    page_html_list.append(first_li)
    # 加上一页
    if self.current_page == 1:
      prev_li = '<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>'
    else:
      prev_li = '<li><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external<div style="color:transparent">本文来源gaodai.ma#com搞#代!码(网</div> nofollow" rel="external nofollow" rel="external nofollow" >上一页</a></li>'.format(self.base_url, self.current_page - 1)
    page_html_list.append(prev_li)
    for i in range(show_start, show_end + 1):
      if i == self.current_page:
        li_tag = '<li class="active"><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{1}</a></li>'.format(self.base_url, i)
      else:
        li_tag = '<li><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{1}</a></li>'.format(self.base_url, i)
      page_html_list.append(li_tag)
     # 加下一页
    if self.current_page == self.total_page:
      next_li = '<li><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>'
    else:
      next_li = '<li><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >下一页</a></li>'.format(self.base_url, self.current_page + 1)
    page_html_list.append(next_li)
 
    # 加尾页
    page_end_li = '<li><a href="{0}?page={1}" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >尾页</a></li>'.format(self.base_url, self.total_page)
    page_html_list.append(page_end_li)
     return "".join(page_html_list)