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使用Flask怎么實(shí)現(xiàn)一個(gè)登錄注冊(cè)項(xiàng)目？很多新手對(duì)此不是很清楚，為了幫助大家解決這個(gè)難題，下面小編將為大家詳細(xì)講解，有這方面需求的人可以來學(xué)習(xí)下，希望你能有所收獲。
目錄結(jié)構(gòu)
配置文件設(shè)計(jì)
/templates/config.py
#數(shù)據(jù)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(cè)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(gè)form中-->
<form method="POST">
<input type="text" name="username" placeholder="請(qǐng)輸入用戶名" />
<br/>
<input type="password" name="password" placeholder="請(qǐng)輸入密碼（小于12位）" />
<br/>
<!--jinja2的函數(shù)-->
{% if message %} {{message}} {% endif %}
<br/>
<input type="submit" value="登錄" />
<input type="reset" value="重置" />
<!--跳轉(zhuǎn)到register的頁面-->
<a href="{{ url_for('register') }}" rel="external nofollow" >注冊(cè)</a>
</form>
</div>
</body>
</html>注冊(cè)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(cè)</title>
</head>
<body>
<div>
<h2>用戶注冊(cè)</h2>
<form method="POST">
<input type="text" name="username" placeholder="請(qǐng)輸入用戶名" />
<br/>
<input type="password" name="password" placeholder="請(qǐng)輸入密碼（小于12位）" />
<br/>
<!--jinja2的函數(shù)-->
{% if message %} {{message}} {% endif %}
<br/>
<input type="submit" value="注冊(cè)" />
<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(yàn) /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(cè)校驗(yàn) /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(duì)數(shù)據(jù)庫內(nèi)容有改變，需要commit()
conn.close()最后編輯運(yùn)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(cè)發(fā)送的請(qǐng)求為POST請(qǐng)求
username = request.form['username']
password = request.form['password']
if is_null(username,password):
login_massage = "溫馨提示：賬號(hào)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(cuò)誤，請(qǐng)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(hào)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()看完上述內(nèi)容是否對(duì)您有幫助呢？如果還想對(duì)相關(guān)知識(shí)有進(jìn)一步的了解或閱讀更多相關(guān)文章，請(qǐng)關(guān)注億速云行業(yè)資訊頻道，感謝您對(duì)億速云的支持。
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