原生上传图片方式
#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 <!DOCTYPE html> <html lang=\"en\"> <head> <meta charset=\"UTF-8\"> <title>Title</title> </head> <body> <form action=\"/student/\" method=\"post\" enctype=\"multipart/form-data\"> {% csrf_token %} <p> <label for=\"ua\">姓名: </label> <input type=\"text\" name=\"uname\" id=\"ua\"/> </p> <p> <label for=\"ph\">头像: </label> <input type=\"file\" name=\"photo\" id=\"ph\"/> </p> <p>      <input type=\"submit\" value=\"注册\"/> </p> </form> </body> </html> #效果如下: 访问: http://127.0.0.1:8000/student/
Django 图片上传方式
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<path>.*)/$\', 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 <!DOCTYPE html> <html lang=\"en\"> <head> <meta charset=\"UTF-8\"> <title>Title</title> </head> <body> <form action=\"/student/upload/\" method=\"post\" enctype=\"multipart/form-data\"> {% csrf_token %} <p> <label for=\"ua\">姓名: </label> <input type=\"text\" name=\"uname\" id=\"ua\"/> </p> <p> <label for=\"ph\">头像: </label> <input type=\"file\" name=\"photo\" id=\"ph\"/> </p> <p>      <input type=\"submit\" value=\"注册\"/> </p> </form> </body> </html> # 增加模板文件 show.html <!DOCTYPE html> <html lang=\"en\"> <head> <meta charset=\"UTF-8\"> <title>Title</title> </head> <body> <table width=\"500px\" border=\"1\" cellspacing=\"0\"> <tr> <th>编号</th> <th>姓名</th> <th>头像</th> <th>操作</th> </tr> {% for stu in stus %} <tr> <td>{{ forloop.counter }}</td> <td>{{ stu.sname }}</td> <td><img style=\"width: 200px;\" src=\"{{ MEDIA_URL }}{{ stu.photo }}\"/></td> <td> 下载</td> </tr> {% endfor %} </table> </body> </html> 效果图: http://127.0.0.1:8000/student/ 注册实现数据库录入操作(点击提交通过index.html 中action=\"/student/upload/\" 将url 转发至函数upload_view ,实现上传功能) http://127.0.0.1:8000/student/showall/ 实现数据库信息展示
图片下载功能
### 需求 在显示页面点击下载实现图片的下载功能 过程: #修改 show.html ,加入 下载的超链接 <!DOCTYPE html> <html lang=\"en\"> <head> <meta charset=\"UTF-8\"> <title>Title</title> </head> <body> <table width=\"500px\" border=\"1\" cellspacing=\"0\"> <tr> <th>编号</th> <th>姓名</th> <th>头像</th> <th>操作</th> </tr> {% for stu in stus %} <tr> <td>{{ forloop.counter }}</td> <td>{{ stu.sname }}</td> <td><img style=\"width: 200px;\" src=\"{{ MEDIA_URL }}{{ stu.photo }}\"/></td> <td><a href=\"/student/download/?photo={{ stu.photo }}\" rel=\"external nofollow\" >下载</a></td> </tr> {% endfor %} </table> </body> </html> #因为 show.html href=\"/student/download ,所以要修改urls #修改 stu/urls.py,新增加 url url(r\'^download/$\',views.download_view) #修改 stu/views.py def download_view(request): # 获取请求参数(图片存储位置) imgs/5566.jpg photo = request.GET.get(\'photo\',\'\') print photo # 获取图片文件名5566.jpg ; rindex 为字符 \'/\' 在 photo 中最后出现的位置索引;例如 # txt = \"imgs/5566.jpg\" # x = txt.rindex(\"/\") # print txt[x + 1:] 输出结果为 5566.jpg filename = photo[photo.rindex(\'/\')+1:] print filename #开启一个流 import os path = os.path.join(os.getcwd(),\'media\',photo.replace(\'/\',\'\\\\\')) print path with open(path,\'rb\') as fr: response = HttpResponse(fr.read()) response[\'Content-Type\']=\'image/png\' response[\'Content-Disposition\'] = \'attachment;filename=\' + filename return response #访问 http://127.0.0.1:8000/student/showall/ ,点击下载
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