1、用url_for加载静态文件
（1）<script src="{{ url_for(‘static‘,filename=‘js/login.js‘) }}"></script>
（2）flask 从static文件夹开始寻找
（3）可用于加载css, js, image文件
from flask import Flask from flask import render_template app = Flask(__name__) @app.route(‘/‘) def switch(): return render_template(‘switch.html‘) @app.route(‘/login/‘) def login(): return render_template(‘login.html‘) @app.route(‘/register/‘) def register(): return render_template(‘register.html‘) if __name__ == ‘__main__‘: app.run(debug=True)
2、继承和扩展
（1）把一些公共的代码放在父模板中，避免每个模板写同样的内容。base.html
（2）子模板继承父模板
1）{% extends ‘base.html’ %}
（3）父模板提前定义好子模板可以实现一些自己需求的位置及名称。block
1）<title>{% block title %}{% endblock %}-MIS问答平台</title>
2）{% block head %}{% endblock %}
3）{% block main %}{% endblock %}
（4）子模板中写代码实现自己的需求。block
1） {% block title %}登录{% endblock %}
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title> 首页 {% block logintitle %}{% endblock %} {% block registertitle %}{% endblock %} </title> <script> function mySwitch() { var oBody= document.getElementById("myBody"); var oOnoff=document.getElementById("myOnOff"); if(oOnoff.src.match("bulbon")){ oOnoff.src="http://www.runoob.com/images/pic_bulboff.gif"; oBody.style.background="black"; oBody.style.color="yellow"; }else{oOnoff.src="http://www.runoob.com/images/pic_bulbon.gif"; oBody.style.background="yellow"; oBody.style.color="black"; } } </script> <link rel="stylesheet" type="text/css" href="../static/css/switch.css"> {% block loginhead %}{% endblock %} {% block registerhead %}{% endblock %} </head> <body id="myBody" style="background-color: yellow"> <nav> <img src="{{ url_for(‘static‘,filename=‘image/gzsxy.png‘) }}"alt="" width="20px"> <script> document.write(Date()) </script> <br> <a href="{{ url_for(‘switch‘) }}">首页</a> <a href="{{ url_for(‘login‘) }}">登录</a> <a href="{{ url_for(‘register‘) }}">注册</a> <input type="text" placeholder="请输入关键字"> <button type="submit">搜索</button> <p align="right"><img src="{{ url_for(‘static‘,filename=‘image/gzt.jpg‘) }}"alt="" width="20px"></p> <p align="right"> <img style="width: 20px" id="myOnOff" onclick="mySwitch()" src=" http://www.runoob.com/images/pic_bulbon.gif"></p> </nav> {% block loginbody %}{% endblock %} {% block registerbody %}{% endblock %} </body> </html>
3、首页、登录页、注册页都按上述步骤改写。
{% extends ‘switch.html‘ %}
{% block logintitle %}欢迎来到登录界面，请登录{% endblock %}
{% block loginhead %}<script type="text/javascript" src="../static/js/login.js"></script>{% endblock %}
{% block loginbody %}
<p id="meto">中国标准时间</p>
<script>document.getElementById("meto").innerHTML = Date()</script>
<div id="container" style="width: 300px ">
<div id="header" style="background-color: darkorange"><h2 align="center">登陆界面</h2></div>
<div id="content">
<p align="center">用户名：<input id="uname" type="text" name="user" placeholder="请输入账号">
</p>
<p align="center"> 密码 ：<input id="upass" type="password" name="psw" placeholder="请输入密码"></p>
<br>
<div id="error_box"><br>
</div>
<input type="radio" value="stu">学生
<input type="radio" value="tea">老师
<br>
<input type="checkbox" value="true">记住密码 <a href="">登陆遇到问题</a><br>
<p align="center"><button onclick="fnLogin()">登录</button></p>
   
</div>
<div id="footer" style="background-color: darkgoldenrod"><h3 align="center">版权所有@</h3></div>
</div>
{% endblock %}
{% extends ‘switch.html‘ %}
{% block registertitletitle %}欢迎来到注册界面，请登录{% endblock %}
{% block registerhead %}<script type="text/javascript" src="../static/js/ma.js"></script>{% endblock %}
{% block registerbody %}
<p id="meto">中国标准时间</p>
<script>document.getElementById("meto").innerHTML = Date()</script>
<div id="container" style="width: 300px">
<div id="header" style="background-color: darkorange"><h2 align="center">注册界面</h2></div>
<div id="content">
<p align="center">用户名：<input id="uname" type="text" name="user" placeholder="请输入账号">
</p>
<p align="center"> 密码 ：<input id="upass" type="password" name="psw" placeholder="请输入密码"></p>
<p align="center">密码 ：<input id="upass2" type="password" name="psw2" placeholder="请再次输入密码"></p>
<br>
<div id="error_box"><br>
</div>
<input type="radio" value="stu">学生
<input type="radio" value="tea">老师
<br>
<input type="checkbox" value="true">记住密码 <a href="">登陆遇到问题</a><br>
<p align="center"><button onclick="fnLogin()">注册</button></p>
   
</div>
<div id="footer" style="background-color: darkgoldenrod"><h3 align="center">版权所有@</h3></div>
</div>
{% endblock %}
原文：http://www.cnblogs.com/018linbin/p/7788147.html