原文章https://www.cnblogs.com/ilovepython/p/10776850.html
1、創建一個html文件用於簡單的網頁注冊demo
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>注冊</title>
</head>
<body><!--表單域，action用於將獲取的到信息提交到后台地址-->
<form action="save" method="get">
<span>
用戶:<input type="text" name="username">
</span>
<br>
<span>
密碼:<input type="password" name="password">
</span>
<br>
<span>
<input type="submit" name="submit1" value="注冊">
</span>
</form>
</body>
</html>
2、創建一個html文件用於簡單的網頁登錄demo
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>登錄</title>
</head>
<body>
<form action="query" method="get">
<span>
用戶:<input type="text" name="username">
</span>
<br>
<span>
密碼:<input type="password" name="password">
</span>
<br>
<span>
<input type="submit" name="submit1" value="登錄">
</span>
</form>
</body>
</html>
3、創建一個Django項目，並將剛才的兩個html文件放入template模板文件夾中
4、打開Django項目下默認生成的urls.py文件，進行一些業務功能的編輯
"""Django01 URL Configuration
The `urlpatterns` list routes URLs to views. For more information please see:
https://docs.djangoproject.com/en/2.1/topics/http/urls/
Examples:
Function views
1. Add an import: from my_app import views
2. Add a URL to urlpatterns: path('', views.home, name='home')
Class-based views
1. Add an import: from other_app.views import Home
2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
Including another URLconf
1. Import the include() function: from django.urls import include, path
2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from django.shortcuts import render
from django.shortcuts import HttpResponse
import pymysql
#登錄頁面
def login(request):
#指定要訪問的頁面，render的功能：講請求的頁面結果提交給客戶端
return render(request,'login.html')
#注冊頁面
def regiter(request):
return render(request,'regiter.html')
#定義一個函數，用來保存注冊的數據
def save(request):
has_regiter = 0#用來記錄當前賬號是否已存在，0：不存在 1：已存在
a = request.GET#獲取get()請求
#print(a)
#通過get()請求獲取前段提交的數據
userName = a.get('username')
passWord = a.get('password')
#print(userName,passWord)
#連接數據庫
db = pymysql.connect('127.0.0.1','root','123','db2')
#創建游標
cursor = db.cursor()
#SQL語句
sql1 = 'select * from user1'
#執行SQL語句
cursor.execute(sql1)
#查詢到所有的數據存儲到all_users中
all_users = cursor.fetchall()
i = 0
while i < len(all_users):
if userName in all_users[i]:
##表示該賬號已經存在
has_regiter = 1
i += 1
if has_regiter == 0:
# 將用戶名與密碼插入到數據庫中
sql2 = 'insert into user1(username,password) values(%s,%s)'
cursor.execute(sql2,(userName,passWord))
db.commit()
cursor.close()
db.close()
return HttpResponse('注冊成功')
else:
cursor.close()
db.close()
return HttpResponse('該賬號已存在')
def query(request):
a = request.GET
userName = a.get('username')
passWord = a.get('password')
user_tup = (userName,passWord)
db = pymysql.connect('127.0.0.1','root','123','db2')
cursor = db.cursor()
sql = 'select * from user1'
cursor.execute(sql)
all_users = cursor.fetchall()
cursor.close()
db.close()
has_user = 0
i = 0
while i < len(all_users):
if user_tup == all_users[i]:
has_user = 1
i += 1
if has_user == 1:
return HttpResponse('登錄成功')
else:
return HttpResponse('用戶名或密碼有誤')
urlpatterns = [
path('admin/', admin.site.urls),#系統默認創建的
path('login/',login),#用於打開登錄頁面
path('regiter/',regiter),#用於打開注冊頁面
path('regiter/save',save),#輸入用戶名密碼后交給后台save函數處理
path('login/query',query)#輸入用戶名密碼后交給后台query函數處理
]
5、運行整個Django項目，訪問相應的url
數據庫數據情況：
后台狀態信息
再次查看數據庫數據：
6、再次進行登錄操作，打開登錄的url
測試一個用戶名錯誤情況：
