九、Django媒体文件&静态文件&文件上传
1.静态文件和媒体文件
- 媒体文件: 用户上传的文件, 叫做
media - 静态文件: 存放在服务器的 css, js, image等,叫做
static
在Django中使用静态文件
{% static 'img/example.jpg' %}=> static模板关键字就是在settings.py中指定的静态文件夹中(应用下的static文件夹和STATICFILES_DIR寻找到符合条件的静态文件- 然后将
相对路径写入html标签中 注意: 应用下的static文件夹里的文件(包括STATICFILES_DIR下的文件) 似乎在网站生成时都统一放在了http://127.0.0.1:8000/static/下
首先确保django.contrib.staticfiles在INSTELLED_APPS中
2) 在 setting.py中定义 SRARIC_URLSTATIC_URL = '/static/'
3) 在你的app的static目录中存放静态文件,比如APP/ static/ example.jpg
4) 如果有别的静态文件,不在app的static目录下,可以通过 STATICFILES_DIRS来指定额外的静态搜索目录STATICFILES_DIR = [os.path.join(BASE_DIR, 'static'),...]
5) 在模板中使用load标签去加载文件{% load static %}<img src="/static/index.css" /><img src="{% static 'img/example.jpg' %}" />
在django中使用媒体文件
在settings中配置 MEDIA_ROOT, 就是指定文件上传的路径选项
MEDIA_ROOT = os.path.join(BASE_DIR,"media")
2. 文件上传
单文件上传
文件上传要求form表单存在enctype="multipart/form-data"属性，并且提交方法是post。<form enctype="multipart/form-data" action="/uploadFile/" method="post"><input type="file" name="myfile" /><br/><input type="submit" value="upload"/></form>最简单的文件上传:
def file_upload(request):if request.method =='POST':# 获取上传的文件，如果没有文件，则默认为NonemyFile = request.FILES.get('myfile', None)if not myFile:return HttpResponse("no files for upload")file_path = os.path.join(settings.MEDIA_ROOT, '1.jpg')with open(file_path, 'ab') as fp:for part in myFile.chunks():fp.write(part)return HttpResponse("上传成功！")else:return render(request, 'index.html')
单文件上传案例
views.py
import os
import uuid
from django.conf import settings
from django.shortcuts import redirect, render
from django.urls import reverse
from App.models import *
# Create your views here.def index(request):return render(request, 'index.html')def index2(request):return render(request, 'index2.html')# 单文件上传
def upload1(request):if request.method == 'GET':return render(request, 'upload1.html')elif request.method == 'POST':# 单文件上传uname = request.POST.get('uname')icon = request.FILES.get('icon') # 单个文件print(uname, icon, type(icon))# 1.将上传的图片存储到后台对应的媒体文件中# file_name = icon.name # 尽量不要使用图片的原始名称, 避免重复 # file_name = get_uuid() + icon.name[icon.name.rfind('.'):] # 获取后缀名file_name = get_uuid() + os.path.splitext(icon.name)[-1] # 获取后缀名file_path = os.path.join(settings.MEDIA_ROOT , file_name)print(file_path)with open(file_path, 'wb') as f:for chunk in icon.chunks(): # 分块写入f.write(chunk)f.flush() # 立即写入# 2.将该媒体文件的路径,存入到数据库中user = UserModel()user.name = unameuser.icon = 'uploads/' + file_name # 注意: 存储的是相对路径, 而不是绝对路径,相对于static的路径user.save()return render(request, 'upload1.html')# 获取uuid, 用于生成唯一的文件名
def get_uuid():return str(uuid.uuid4())def showicon(request, uid):if uid == None: # 如果没有传uid, 则默认为1uid = 1# 显示用户的头像user = UserModel.objects.filter(id=uid).first()print(user, user.name, user.icon)return render(request, 'showicon.html', {'user': user}) # 多文件上传
def upload2(request):if request.method == 'GET':return render(request, 'upload2.html')elif request.method == 'POST':# 接收前端的参数uname = request.POST.get('uname')uid = UserModel.objects.filter(name=uname).first().idimgs = request.FILES.getlist('imgs') # 多个文件print(uname, imgs, type(imgs))# [<InMemoryUploadedFile: chapter11_主界面.png (image/png)>, <InMemoryUploadedFile: chapter12_对话框.png (image/png)>] <class 'list'># 遍历文件列表, 依次上传for img in imgs:# 1.将上传的图片存储到后台对应的媒体文件中file_name = get_uuid() + os.path.splitext(img.name)[-1] # 获取后缀名file_path = os.path.join(settings.MEDIA_ROOT, file_name)with open(file_path, 'wb') as f:for chunk in img.chunks(): # 分块写入f.write(chunk)f.flush() # 立即写入# 2.将该媒体文件的路径,存入到数据库中photo = PhotoModel()photo.img = 'uploads/' + file_namephoto.user = UserModel.objects.filter(name=uname).first()photo.save()return redirect(reverse('showicon',kwargs={'uid': uid}))settings.py
STATIC_URL = 'static/'
STATICFILES_DIRS = [BASE_DIR / 'static'
]
MEDIA_ROOT = BASE_DIR /'static/uploads'
models.py
from django.db import models# Create your models here.class UserModel(models.Model):name = models.CharField(max_length=32, unique=True)# 头像(存储头像的路径)icon = models.CharField(max_length=128)
upload1.html
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>单文件上传</title>
</head>
<body><form action="" method="post" enctype="multipart/form-data">{% csrf_token %}<p>用户名: <input type="text" name='uname'></p><p>头像: <input type="file" name="icon"></p><button>上传</button></form>
</body>
</html>
showicon.html
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>显示图标</title>
</head>
<body><h1>显示图标</h1><hr>{% load static %}<p>{{user.name}}</p><img src="{% static user.icon %}" alt="">
</body>
</html>
多文件上传
多文件上传和单文件上传类似
1.需要在模板文件的form表单input中添加multiple
2.后台获取时使用request.FILES.getlist('myfile', None)
def file_upload2(request):if request.method == 'POST':# 获取上传的文件，如果没有文件，则默认为NonemyFiles = request.FILES.getlist('myfile', None)for myFile in myFiles:if not myFile:return HttpResponse("no files for upload")file_path = os.path.join(settings.MEDIA_ROOT, myFile.name)with open(file_path, 'ab') as fp:for part in myFile.chunks():fp.write(part)return HttpResponse("上传成功！")else:return render(request, 'index.html')
多文件上传案例
views.py
import os
import uuid
from django.conf import settings
from django.shortcuts import redirect, render
from django.urls import reverse
from App.models import *
# Create your views here.def index(request):return render(request, 'index.html')def index2(request):return render(request, 'index2.html')# 单文件上传
def upload1(request):if request.method == 'GET':return render(request, 'upload1.html')elif request.method == 'POST':# 单文件上传uname = request.POST.get('uname')icon = request.FILES.get('icon') # 单个文件print(uname, icon, type(icon))# 1.将上传的图片存储到后台对应的媒体文件中# file_name = icon.name # 尽量不要使用图片的原始名称, 避免重复 # file_name = get_uuid() + icon.name[icon.name.rfind('.'):] # 获取后缀名file_name = get_uuid() + os.path.splitext(icon.name)[-1] # 获取后缀名file_path = os.path.join(settings.MEDIA_ROOT , file_name)print(file_path)with open(file_path, 'wb') as f:for chunk in icon.chunks(): # 分块写入f.write(chunk)f.flush() # 立即写入# 2.将该媒体文件的路径,存入到数据库中user = UserModel()user.name = unameuser.icon = 'uploads/' + file_name # 注意: 存储的是相对路径, 而不是绝对路径,相对于static的路径user.save()return render(request, 'upload1.html')# 获取uuid, 用于生成唯一的文件名
def get_uuid():return str(uuid.uuid4())def showicon(request, uid):if uid == None: # 如果没有传uid, 则默认为1uid = 1# 显示用户的头像user = UserModel.objects.filter(id=uid).first()print(user, user.name, user.icon)return render(request, 'showicon.html', {'user': user}) # 多文件上传
def upload2(request):if request.method == 'GET':return render(request, 'upload2.html')elif request.method == 'POST':# 接收前端的参数uname = request.POST.get('uname')uid = UserModel.objects.filter(name=uname).first().idimgs = request.FILES.getlist('imgs') # 多个文件print(uname, imgs, type(imgs))# [<InMemoryUploadedFile: chapter11_主界面.png (image/png)>, <InMemoryUploadedFile: chapter12_对话框.png (image/png)>] <class 'list'># 遍历文件列表, 依次上传for img in imgs:# 1.将上传的图片存储到后台对应的媒体文件中file_name = get_uuid() + os.path.splitext(img.name)[-1] # 获取后缀名file_path = os.path.join(settings.MEDIA_ROOT, file_name)with open(file_path, 'wb') as f:for chunk in img.chunks(): # 分块写入f.write(chunk)f.flush() # 立即写入# 2.将该媒体文件的路径,存入到数据库中photo = PhotoModel()photo.img = 'uploads/' + file_namephoto.user = UserModel.objects.filter(name=uname).first()photo.save()return redirect(reverse('showicon',kwargs={'uid': uid}))
upload2.html文件多选 -> multiple
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>多文件上传</title>
</head>
<body>{% comment %} multipart/form-data支持文件上传 {% endcomment %}{% comment %} multiple: 支持文件多选 {% endcomment %}<form action="" method="post" enctype="multipart/form-data">{% csrf_token %}<p>用户名: <input type="text" name='uname'></p><p>选择上传的图片: <input type="file" name="imgs" multiple></p><button>上传</button></form>
</body>
</html>
showicon.html添加
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>显示图标</title>
</head>
<body><h1>显示图标</h1><hr>{% load static %}<p>{{user.name}}</p><p>头像<img src="{% static user.icon %}" alt=""></p><hr><h3>{{user.name}}的相册</h3>{% for photo in user.photomodel_set.all %}<img src="{% static photo.img %}" alt="" width=100>{% endfor %}</body>
</html>
的多变量/时间序列预测/matlab代码)
![[WASAPI]音频API:从Qt MultipleMedia走到WASAPI，相似与不同](http://pic.xiahunao.cn/nshx/[WASAPI]音频API:从Qt MultipleMedia走到WASAPI，相似与不同)
