django 不能访问静态资源的解决办法

最近在中文win10下使用python的django搭建web测试服务器，发现一个诡异的现象，正常配置好django的模型，视图和模板,

1.setting.py内容如下：

"""
Django settings for test4 project.

Generated by 'django-admin startproject' using Django 1.8.3.

For more information on this file, see
https://docs.djangoproject.com/en/1.8/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.8/ref/settings/
"""

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
import os

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = ')j2-td!h@f=*(cb3htaifp19u47j6l8=ky*lumq!q7*#=uu1-9'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = ['*', ]

# Application definition

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'booktest',
)

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.security.SecurityMiddleware',
)

ROOT_URLCONF = 'test4.urls'

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',
            ],
        },
    },
]

WSGI_APPLICATION = 'test4.wsgi.application'

# Database
# https://docs.djangoproject.com/en/1.8/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': "mysql",
        'USER': "root",
        "PASSWORD": "mysql",
        "HOST": "localhost",
        "PORT": 3306,
    }
}

# Internationalization
# https://docs.djangoproject.com/en/1.8/topics/i18n/

LANGUAGE_CODE = 'zh-hans'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.8/howto/static-files/

STATIC_URL = '/static/'
STATICFILES_DIR = [os.path.join(BASE_DIR, 'static'), ]

2.应用booktest的views.py

from django.shortcuts import render

# Create your views here.
def index(request):
    return render(request,"booktest/index.html")

3.应用booktest的urls.py内容如下：

from django.conf.urls import url
from booktest import views

urlpatterns = [
    url(r'^test/', views.index),
]

4.模板文件index.html

<!DOCTYPE html>
　{% load staticfiles %}
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>静态文件显示演示</title>
</head>
<body>
<h1>这是一个演示图片</h1>
<img src="/static/images/test.JPG"><br/>
<img src={% static 'images/test.JPG' %}><br/>
</body>
</html>

工程结构如下：

工程test4下urls.py的内容如下：

from django.conf.urls import include, url
from django.contrib import admin

urlpatterns = [
    url(r'^admin/', include(admin.site.urls)),
    url(r'^', include("booktest.urls"))
]

然后通过通过浏览器http://localhost/test/访问，总是在后端提示404错误
后来无意发现把静态资源文件挪到应用booktest目录下即可正常访问静态资源了，当然也可直接http://localhost/static/images/test.jpg进行访问了
但是直接使用http://localhost/static/不能访问，在后端提示“Directory indexes are not allowed here.”

这个问题希望网友能提供解决办法，谢谢。

我使用的python3.6,djanggo版本是1.8.3