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這篇文章主要介紹“Flask如何實現注冊登錄項目”的相關知識，小編通過實際案例向大家展示操作過程，操作方法簡單快捷，實用性強，希望這篇“Flask如何實現注冊登錄項目”文章能幫助大家解決問題。
配置文件設計
/templates/config.py
#數據庫連接配置
import pymysql
conn = pymysql.connect(
host='192.XXX.XXX.XX',
port=320xx,
user='root',
password='123456',
database='test_XX'
)首頁/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>林家小豬測試小站</title>
</head>
<body>
<div>
<h2>您好，{{ username }}，歡迎來到我的小站</h2>
<a href="{{ url_for('user_login') }}" rel="external nofollow" rel="external nofollow" >退出</a>
<br/>
</div>
</body>
</html>登錄頁面/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>登錄</title>
</head>
<body>
<div>
<h2>用戶登錄</h2>
<!--將登陸信息放到一個form中-->
<form method="POST">
<input type="text" name="username" placeholder="請輸入用戶名" />
<br/>
<input type="password" name="password" placeholder="請輸入密碼（小于12位）" />
<br/>
<!--jinja2的函數-->
{% if message %} {{message}} {% endif %}
<br/>
<input type="submit" value="登錄" />
<input type="reset" value="重置" />
<!--跳轉到register的頁面-->
<a href="{{ url_for('register') }}" rel="external nofollow" >注冊</a>
</form>
</div>
</body>
</html>注冊頁面/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>注冊</title>
</head>
<body>
<div>
<h2>用戶注冊</h2>
<form method="POST">
<input type="text" name="username" placeholder="請輸入用戶名" />
<br/>
<input type="password" name="password" placeholder="請輸入密碼（小于12位）" />
<br/>
<!--jinja2的函數-->
{% if message %} {{message}} {% endif %}
<br/>
<input type="submit" value="注冊" />
<input type="reset" value="重置" />
<a href="{{ url_for('user_login') }}" rel="external nofollow" rel="external nofollow" >登錄</a>
</form>
</div>
</body>
</html>登錄校驗 /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注冊校驗 /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() # 對數據庫內容有改變，需要commit()
conn.close()最后編輯運行文件
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': # 注冊發送的請求為POST請求
username = request.form['username']
password = request.form['password']
if is_null(username,password):
login_massage = "溫馨提示：賬號和密碼是必填"
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：密碼錯誤，請輸入正確密碼"
return render_template('login.html', message=login_massage)
else:
login_massage = "不存在該用戶"
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 = "溫馨提示：賬號和密碼是必填"
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()關于“Flask如何實現注冊登錄項目”的內容就介紹到這里了，感謝大家的閱讀。如果想了解更多行業相關的知識，可以關注億速云行業資訊頻道，小編每天都會為大家更新不同的知識點。
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