- 新建Flask项目。
- 设置调试模式。
- 理解Flask项目主程序。
- 使用装饰器,设置路径与函数之间的关系。
- 使用Flask中render_template,用不同的路径,返回首页、登录员、注册页。
- 用视图函数反转得到URL,{{url_for(‘login’)}},完成导航条里的链接。
from flask import Flask,render_template
app = Flask(__name__)
@app.route('/')
def index():
    return render_template('index.html')
@app.route('/login/')
def login():
    return render_template('login.html')
@app.route('/regist/')
def regist():
    return render_template('regist.html')
if __name__ == '__main__':
    app.run(debug=True)
 
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
<a href="http://127.0.0.1:5000">首页</a>
<a href="http://127.0.0.1:5000/login">登录</a>
<a href="{{ url_for('regist') }}">注册</a>
<h1>首页</h1>
</body>
</html>
 
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>登录</title>
  <link href="../static/css/denglu.css" rel="stylesheet" type="text/css">
  <script src="../static/js/denglu.js"></script>
</head>
<body>
<form method="post" action="index.html">
<div class="box">
<h1>用户登录</h1>
<div class="input_box1">
     <input id="uname" type="text" placeholder="请输入用户名">
 </div>
 <div class="input_box2">
    <input id="upass" type="password" placeholder="请输入密码">
        </div>
        <div id="error_box"><br></div>
   <div class="input_box">
       <button onclick="fnlogin()">登录</button>
   </div>
</div>
</form>
</body>
</html>
 
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>注册</title>
  <link href="../static/css/denglu.css" rel="stylesheet" type="text/css">
  <script src="../static/js/denglu.js"></script>
</head>
<body>
<form method="post" action="index.html">
<div class="box">
<h1>注册</h1>
<div class="input_box1">
     <input id="uname" type="text" placeholder="请输入用户名">
 </div>
 <div class="input_box2">
    <input id="upass" type="password" placeholder="请输入密码">
     <input id="upass1" type="password" placeholder="请确认密码">
        </div>
        <div id="error_box"><br></div>
   <div class="input_box">
       <button onclick="fnlogin()">登录</button>
   </div>
</div>
</form>
</body>
</html>