使用Django怎么编写一个图片上传下载功能？针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
#新建工程
python manage.py startapp test30
#修改 settings.py
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'stu'
]
#修改urls.py
from django.conf.urls import url, include
from django.contrib import admin
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'student/',include('stu.urls')),
]
#新增加 stu/urls.py
#coding:utf-8
from django.conf.urls import url
import views
urlpatterns = [
url(r'^$',views.index_view)
]
#编辑 stu/views.py
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.http import HttpResponse
from django.shortcuts import render
# Create your views here.
#原生上传文件方式
def index_view(request):
if request.method == 'GET':
return render(request,'index.html')
elif request.method == 'POST':
#获取请求参数
uname = request.POST.get('uname','')
photo = request.FILES.get('photo','')
print photo.name
import os
print os.getcwd()
if not os.path.exists('media'):
os.mkdir('media')
#拼接路径
with open(os.path.join(os.getcwd(),'media',photo.name),'wb') as fw:
# photo.read() #一次性读取文件到内存
# fw.write(photo.read())
#分块读取，性能高
for ck in photo.chunks():
fw.write(ck)
return HttpResponse('It is post request,上传成功')
else:
return HttpResponse('It is not post and get request!')
#新增加模板文件 templates/index.html
Title
{% csrf_token %}
姓名:
头像:
#效果如下:
访问: http://127.0.0.1:8000/student/ 
需求：
效果: 访问 http://127.0.0.1:8000/student/ 通过注册将姓名、头像地址传入数据库中；
访问 http://127.0.0.1:8000/student/showall 将数据库信息通过表格形式展示
###过程
#修改 settings.py ，templates 新增加 'django.template.context_processors.media'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(BASE_DIR, 'templates')]
,
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
'django.template.context_processors.media'
],
},
},
]
末尾增加：
# global_settings
#指定上传文件存储相对路径（读取文件）
MEDIA_URL = '/media/'
#指定上传文件存储绝对路径（存储文件）
MEDIA_ROOT = os.path.join(BASE_DIR,'media')
#创建数据库模型 stu/models.py
# -*- coding: utf-8 -*-
from __future__ import unicode_literals
from django.db import models
# Create your models here.
class Student(models.Model):
sno = models.AutoField(primary_key=True)
sname = models.CharField(max_length=30)
photo = models.ImageField(upload_to='imgs')
def __unicode__(self):
return u'Student:%s'%self.sname
#生成数据库迁移文件,查看数据库表结构
python makemigrations stu
python migrate
#修改 urls.py 因为显示问题，增加 DEBUG 内容
from django.conf.urls import url, include
from django.contrib import admin
from test30.settings import DEBUG, MEDIA_ROOT
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'student/',include('stu.urls')),
]
from django.views.static import serve
if DEBUG:
urlpatterns+=url(r'^media/(?P.*)/$', serve, {"document_root": MEDIA_ROOT}),
#修改 urls， stu/urls.py
#coding:utf-8
from django.conf.urls import url
import views
urlpatterns = [
url(r'^$',views.index_view),
url(r'^upload/$',views.upload_view),
url(r'^showall/$',views.showall_view)
]
# 修改 stu/views.py
#django 上传文件方式
def upload_view(request):
uname = request.POST.get('uname','')
photo = request.FILES.get('photo','')
#入库操作
Student.objects.create(sname=uname,photo=photo)
return HttpResponse('上传成功!')
#显示图片
def showall_view(request):
stus = Student.objects.all()
print stus
return render(request,'show.html',{'stus':stus})
# 修改 index.html
Title
{% csrf_token %}
姓名:
头像:
# 增加模板文件 show.html
Title
编号
姓名
头像
操作
{% for stu in stus %}
{{ forloop.counter }}
{{ stu.sname }}
下载
{% endfor %}