似乎无法链接我的样式表，有人可以告诉我原因吗？
我正在尝试使用数据库设置示例实例，并在flask上运行。
我以为这是我的文件夹位置，但是我已经仔细检查了它是否在正确的位置，无法弄清楚为什么，花了数小时试图修复它。
我的HTML：
{% extends "layout.html" %}
{% block title %}
CS50_Web_Project1
{% endblock %}
{% block body %}
<h1>Login to CS50_Web_Project1</h1>
<form action="{{ url_for('register') }}" method="POST">
<button>Register</button>
</form>
{% endblock %}
我的layout.html
<!DOCTYPE html>
<html>
<head>
<title>{% block title %}{% endblock %}</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Zug+QiDoJOrZ5t4lssLdxGhVrurbmBWopoEl+M6BdEfwnCJZtKxi1KgxUyJq13dy" crossorigin="anonymous">
<!-- #olaf: own link to own style sheet-->
<link rel="stylesheet" href="css/style.css" type="text/css" >
<!-- #olaf: copied from https://bootsnipp.com/snippets/GaEOX-->
<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
</head>
<body>
<div class="container">
{% block body %}
{% endblock %}
</div>
</body>
</html>
我的css在css / style.css位置：
/* style.css */
.note
{
text-align: center;
height: 80px;
background: -webkit-linear-gradient(left, #0072ff, #8811c5);
color: #fff;
font-weight: bold;
line-height: 80px;
}
.form-content
{
padding: 5%;
border: 1px solid #ced4da;
margin-bottom: 2%;
}
.form-control{
border-radius:1.5rem;
}
.btnSubmit
{
border:none;
border-radius:1.5rem;
padding: 1%;
width: 20%;
cursor: pointer;
background: #0062cc;
color: #fff;
}
我的application.py：
import os
from flask import Flask, session, render_template, jsonify, request
from flask_session import Session
from sqlalchemy import create_engine
from sqlalchemy.orm import scoped_session, sessionmaker
app = Flask(__name__)
#from the internet...# app.config['DATABASE_URL'] = "path_to_db"
# Check for environment variable
if not "postgres://ufahdppxmwmnfk:e0c55691f4045b71ca10ca5fad61e91027d9131fb8c7904142dcb0677f2a4a2e@ec2-23-21-13-88.compute-1.amazonaws.com:5432/d2vbqq75absh07":
raise RuntimeError("DATABASE_URL is not set")
# Configure session to use filesystem
app.config["SESSION_PERMANENT"] = False
app.config["SESSION_TYPE"] = "filesystem"
Session(app)
# Set up database
engine = create_engine("postgres://ufahdppxmwmnfk:e0c55691f4045b71ca10ca5fad61e91027d9131fb8c7904142dcb0677f2a4a2e@ec2-23-21-13-88.compute-1.amazonaws.com:5432/d2vbqq75absh07")
db = scoped_session(sessionmaker(bind=engine))
#olaf: create a login page that has a form, containing "login" & "register" button
@app.route("/")
def index():
return render_template("index.html")
#olaf: Login button
@app.route("/register", methods=["POST"])
def register():
"""Register for the site"""
return render_template("registerSuccess.html")
我可以建议的第一个解决方案是，下载引导程序文件，并将其放在本地工作目录中，然后创建一个包含静态文件的文件夹，然后尝试以下代码
<link href="{{ url_for('static', filename='css/bootstrap.min.css') }}" rel="stylesheet">