这里首先要安装两个库
pip install flask_sqlalchemy
pip install mysqlclient
这里要简单介绍下Flask中分文件（标准结构）
Flask中的架构可分为：
1. 启动文件（负责启动）
2. 核心文件
3. 路由注册文件
如下结构：
templates放模板
application.py为核心文件
controller.py放请求控制端
manager.py放启动文件
www.py放路由注册文件
程序运行截图如下：
源码如下：
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<p>Flask 查询数据库</p>
{% for item in result %}
{{item['User']}}
{% endfor %}
</body>
</html>application.py
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config["SQLALCHEMY_DATABASE_URI"] = "mysql://root:[email protected]/mysql"
db = SQLAlchemy(app)controller.py
from flask import Flask,Blueprint,request,make_response,jsonify,render_template
from sqlalchemy import text
from application import db
index_page = Blueprint("index_page", __name__)
@index_page.route("/sql")
def sqlQuery():
context = {}
sql = text("select * from user")
result = db.engine.execute(sql)
context["result"] = result
return render_template("index.html", **context)manager.py
from application import app
from www import *
if __name__ == "__main__":
app.run(host = "0.0.0.0", debug = "True")from application import app
from controller import index_page
app.register_blueprint(index_page, url_prefix = "/it1995")