本文主要介绍了Flask登录注册项目的简单实现，分享给大家，具体如下：
目录结构
配置文件设计
/templates/config.py
#数据库连接配置
import pymysql
conn = pymysql.connect(
host='192.XXX.XXX.XX',
port=320xx,
user='root',
password='123456',
database='test_XX'
)
首页/templates/index.html
!DOCTYPE html>
html lang="en">
head>
meta charset="UTF-8">
{# link rel=stylesheet type=text/css href="{{ url_for('static', filename='style.css') }}" rel="external nofollow" rel="external nofollow" >#}
meta name="viewport" content="width=device-width, initial-scale=1.0">
link rel="stylesheet" type="text/css" href="/static/style.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
title>林家小猪测试小站/title>
/head>
body>
div>
h1>您好，{{ username }}，欢迎来到我的小站/h1>
a href="{{ url_for('user_login') }}" rel="external nofollow" rel="external nofollow" >退出/a>
br/>
/div>
/body>
/html>
登录页面/templates/login.html
!DOCTYPE html>
html lang="en">
head>
meta charset="UTF-8">
meta name="viewport" content="width=device-width, initial-scale=1.0">
link rel="stylesheet" type="text/css" href="/static/style.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
{# link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}" rel="external nofollow" rel="external nofollow" type="text/css">#}
title>登录/title>
/head>
body>
div>
h1>用户登录/h1>
!--将登陆信息放到一个form中-->
form method="POST">
input type="text" name="username" placeholder="请输入用户名" />
br/>
input type="password" name="password" placeholder="请输入密码（小于12位）" />
br/>
!--jinja2的函数-->
{% if message %} {{message}} {% endif %}
br/>
input type="submit" value="登录" />
input type="reset" value="重置" />
!--跳转到register的页面-->
a href="{{ url_for('register') }}" rel="external nofollow" >注册/a>
/form>
/div>
/body>
/html>
注册页面/templates/register.html
!DOCTYPE html>
html lang="en">
head>
meta charset="UTF-8">
meta name="viewport" content="width=device-width, initial-scale=1.0">
link rel="stylesheet" type="text/css" href="/static/style.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
title>注册/title>
/head>
body>
div>
h1>用户注册/h1>
form method="POST">
input type="text" name="username" placeholder="请输入用户名" />
br/>
input type="password" name="password" placeholder="请输入密码（小于12位）" />
br/>
!--jinja2的函数-->
{% if message %} {{message}} {% endif %}
br/>
input type="submit" value="注册" />
input type="reset" value="重置" />
a href="{{ url_for('user_login') }}" rel="external nofollow" rel="external nofollow" >登录/a>
/form>
/div>
/body>
/html>
登录校验 /model/check_login.py
from templates.config import conn
cur = conn.cursor()
def is_null(username,password):
if(username==''or password==''):
return True
else:
return False
def is_existed(username,password):
sql="SELECT * FROM user WHERE username ='%s' and password ='%s'" %(username,password)
cur.execute(sql)
result = cur.fetchall()
if (len(result) == 0):
return False
else:
return True
def exist_user(username):
sql = "SELECT * FROM user WHERE username ='%s'" % (username)
cur.execute(sql)
result = cur.fetchall()
if (len(result) == 0):
return False
else:
return True
注册校验 /model/regist_login.py
from templates.config import conn
cur = conn.cursor()
def add_user(username, password):
# sql commands
sql = "INSERT INTO user(username, password) VALUES ('%s','%s')" %(username, password)
# execute(sql)
cur.execute(sql)
# commit
conn.commit() # 对数据库内容有改变，需要commit()
conn.close()
最后编辑运行文件
app.py
from flask import Flask,render_template
from flask import redirect
from flask import url_for
from flask import request
from model.check_login import is_existed,exist_user,is_null
from model.check_regist import add_user
app = Flask(__name__)
@app.route('/')
def index():
return redirect( url_for('user_login') )
@app.route('/user_login',methods=['GET','POST'])
def user_login():
if request.method=='POST': # 注册发送的请求为POST请求
username = request.form['username']
password = request.form['password']
if is_null(username,password):
login_massage = "温馨提示：账号和密码是必填"
return render_template('login.html', message=login_massage)
elif is_existed(username, password):
return render_template('index.html', username=username)
elif exist_user(username):
login_massage = "提示：密码错误，请输入正确密码"
return render_template('login.html', message=login_massage)
else:
login_massage = "不存在该用户"
return render_template('login.html', message=login_massage)
return render_template('login.html')
@app.route("/regiser",methods=["GET", 'POST'])
def register():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
if is_null(username,password):
login_massage = "温馨提示：账号和密码是必填"
return render_template('register.html', message=login_massage)
elif exist_user(username):
return redirect(url_for('user_login'))
else:
add_user(request.form['username'], request.form['password'] )
return render_template('index.html', username=username)
return render_template('register.html')
if __name__=="__main__":
app.run()
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