分页一（very low）
因为数据量过大，而又想直观便捷的查看数据，进而通过分页显示就可以完成这项工作
app中views.py
LIST=[] #全局定义一个LIST
for i in range(100): #数据量为100
LIST.append(i) #使LIST里面包含0-99个自然数 def user_list(request):
current_page=request.GET.get('p',1) #用户不存在默认看第一页
current_page=int(current_page) #使char型变为int型
start=(current_page-1)*10 #第一页
end=current_page*10 #最后一页
data=LIST[start:end] #使数据自动分页，每页10个数据 all_count=len(LIST) # 计算LIST的长度
count,y=divmod(all_count,10) #divmod为算法 all_count/10,商为count,余数为y
if y: #y不为0
count+=1 #页数+1
page_list=[]
for i in range(1,count+1):
if i==current_page: #i==页数
temp='<a class="page active" href="/user_list/?p=%s">%s</a>'%(i,i) #点击页数时，通过css使其页数栏变色
else:
temp='<a class="page" href="/user_list/?p=%s">%s</a>'%(i,i)
page_list.append(temp) page_str=''.join(page_list) #以空的字符串将页数连接起来
from django.utils.safestring import mark_safe page_str=mark_safe(page_str) #使page_str为安全 return render(request,'user_list.html',{'li':data,'page_str':page_str})
html文件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.pagination .page{
display: inline-block;
padding: 5px;
background-color: lavender;
color: black;
margin: 10px;
}
.pagination .page .active{
background-color: red;
}
</style>
</head>
<body>
<ul>
{% for item in li %}
{% include 'li.html' %}
{% endfor %}
</ul>
<div class="pagination">
{{ page_str }}
</div> </body>
</html>
li.html
<li>{{ item }}</li>
分页二（一般low）
LIST = []
for i in range(200):
LIST.append(i) def user_list(request):
current_page = request.GET.get('p', 1) # 用户不存在默认看第一页
current_page = int(current_page)
dighter = 10
start = (current_page - 1) * dighter
end = current_page * dighter
data = LIST[start:end] all_count = len(LIST)
count, y = divmod(all_count, 10)
if y:
count += 1 page_list = []
page_num = 11
if all_count < page_num: #如果总页数小于11页
start_index = 1 #起始页为1
end_index = all_count + 1 #终止页为总页数
else:
if current_page <= (page_num + 1) / 2: #如果当前页小于6页
start_index = 1 #起始页为1
end_index = 11 + 1 #终止页为11页
else:
start_index = current_page - (page_num - 1) / 2 #起始页为当前页-5
end_index = current_page + (page_num - 1) / 2 + 1 #终止页为当前页+5
if (current_page + (page_num - 1) / 2) > all_count: #如果当前页+5大于总页数
start_index = all_count - page_num + 1 #起始页为总页数-11+1
end_index = all_count + 1 #终止页为总页数 if current_page == 1: #如果当前页等于第一页
prev = '<a class="page" href="#">上一页</a>' #则停止向前索引
else:
prev = '<a class="page active" href="/user_list/?p=%s">上一页</a>' % (current_page - 1) #否则可以按上一页向前进行索引
page_list.append(prev) for i in range(int(start_index), int(end_index)): #起始页-终止页数为整数
if i == current_page: #如果i为当前页
temp = '<a class="page active" href="/user_list/?p=%s" >%s</a>' % (i, i) # 将当前的页数序号加上颜色
else:
temp = '<a class="page" href="/user_list/?p=%s">%s</a>' % (i, i) # 没有选定的其他页数不加颜色
page_list.append(temp) if current_page == all_count: #如果当前页为总页数
prev = '<a class="page" href="#">下一页</a>' #停止索引
else:
prev = '<a class="page active" href="/user_list/?p=%s">下一页</a>' % (current_page + 1) #否则可以按下一页向下进行索引
page_list.append(prev) jump = """
<input type="text" /><input type="button" value="确定" onclick="jumpTo(this,'/user_list/?p=')" > #跳转至...页
<script>
function jumpTo(ths,base){ #base为/user_list/?p=
var val=ths.previousSibling.value; #获取text框里的数值
location.href=base + val ; #/user_list/?p= + text框里的内容进行跳转
}
</script> """
page_list.append(jump) page_str = ''.join(page_list)
from django.utils.safestring import mark_safe page_str = mark_safe(page_str) return render(request, 'user_list.html', {'li': data, 'page_str': page_str})
分页三（一般般）
###########将分页二变为面向对象编程#############
class Page:
def __init__(self,current_page,data_count,per_page_count=10,page_num=11):
self.current_page=current_page
self.data_count=data_count
self.per_page_count=per_page_count
self.page_num=page_num
def start(self):
return (self.current_page-1)*self.per_page_count
def end(self):
return self.current_page*self.per_page_count
@property
def all_count(self):
v = len(LIST)
v, y = divmod(self.data_count, self.per_page_count)
if y:
v += 1
return v
def page_str(self,base_url):
page_list = []
if self.all_count < self.page_num:
start_index = 1
end_index = self.all_count + 1
else:
if self.current_page <= (self.page_num + 1) / 2:
start_index = 1
end_index = 11 + 1
else:
start_index = self.current_page - (self.page_num - 1) / 2
end_index = self.current_page + (self.page_num - 1) / 2 + 1
if (self.current_page + (self.page_num - 1) / 2) > self.all_count:
start_index = self.all_count - self.page_num + 1
end_index = self.all_count + 1
if self.current_page == 1:
prev = '<a class="page" href="#">上一页</a>'
else:
prev = '<a class="page active" href="%s?p=%s">上一页</a>' % (base_url,self.current_page - 1)
page_list.append(prev)
for i in range(int(start_index), int(end_index)):
if i == self.current_page:
temp = '<a class="page active" href="%s?p=%s" >%s</a>' % (base_url,i, i)
else:
temp = '<a class="page" href="%s?p=%s">%s</a>' % (base_url,i, i)
page_list.append(temp)
if self.current_page == self.all_count:
prev = '<a class="page" href="#">下一页</a>'
else:
prev = '<a class="page active" href="%s?p=%s">下一页</a>' % (base_url,self.current_page + 1)
page_list.append(prev)
jump = """
<input type="text" /><input type="button" value="确定" onclick="jumpTo(this,'%s?p=')" >
<script>
function jumpTo(ths,base){
var val=ths.previousSibling.value;
location.href=base + val ;
}
</script>
"""%(base_url)
page_list.append(jump)
page_str = ''.join(page_list)
from django.utils.safestring import mark_safe
page_str = mark_safe(page_str)
return page_str
LIST=[]
for i in range(200):
LIST.append(i)
def user_list(request):
current_page=request.GET.get('p',1) #用户不存在默认看第一页
current_page=int(current_page)
page_obj=Page(current_page,len(LIST))
data=LIST[page_obj.start():page_obj.end()]
page_str=page_obj.page_str("/user_list/")
return render(request,'user_list.html',{'li':data,'page_str':page_str})