Python Django 實現簡單注冊功能

 

項目創建略，可參考前期文檔介紹。

目錄結構如下

 

編輯views.py 

from django.shortcuts import render

# Create your views here.

from django.http import HttpResponse
from django.shortcuts import render
from common.DBHandle import DataBaseHandle
import time

def djangoHello(request):

    return HttpResponse('Hello Django!')

def index(request):

    return render(request,'index.html')

def login(request):
    print('login_func')

    usn = request.POST['username']
    pwd = request.POST['password']
    host = '127.0.0.1'
    username = 'username'
    password = 'password'
    database = 'dbname'
    port = 3306
    # 實例化 數據庫 連接
    DbHandle = DataBaseHandle(host, username, password, database, port)
    localTime = time.localtime(time.time())
    create_time = time.strftime("%Y-%m-%d %H:%M:%S", localTime)
    sql = "insert into user(username,password,create_time) values ('%s','%s','%s')" % (usn, pwd, create_time)
    DbHandle.insertDB(sql)
    DbHandle.closeDb()


    return render(request,'login.html')

 

 接下來編輯urls.py

"""FirstWeb 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 fistWeb import views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('hello/',views.djangoHello),
    path('index/',views.index),
    path('login/',views.login),
]

 

 在應用下創建templates 文件夾 

並創建html文件 index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>FirstWeb</title>
</head>
<body>
    <h1>信息注冊</h1>
    <!-- action="/login/" 這里是 提交后訪問的路徑，因此 要在 urls 添加改路徑 -->
    <form action="/login/" method="post">
         {% csrf_token %}
        用戶名：<input type="text" name="username" id="usn"><br>
        密  碼：<input type="password" name="password" id="pwd"><br>
        <input type="submit" value="注冊">
    </form>

</body>
</html>

 

login.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>FirstWeb-登錄</title>
</head>
<body>
<h1>您好，您已注冊成功！</h1>
</body>
</html>

 

 

 介紹一下添加的common文件

添加一個數據庫封裝的類。

 

# FileName : DBHandle.py
# Author   : Adil
# DateTime : 2018/11/29 2:03 PM
# SoftWare : PyCharm

import pymysql

# username : adil
# password : helloyyj


class DataBaseHandle(object):
    ''' 定義一個 MySQL 操作類'''


    def __init__(self,host,username,password,database,port):
        '''初始化數據庫信息並創建數據庫連接'''
        # 下面的賦值其實可以省略，connect 時 直接使用形參即可
        self.host = host
        self.username = username
        self.password = password
        self.database = database
        self.port = port
        self.db = pymysql.connect(self.host,self.username,self.password,self.database,self.port,charset='utf8')



    #  這里 注釋連接的方法，是為了 實例化對象時，就創建連接。不許要單獨處理連接了。
    #
    # def connDataBase(self):
    #     ''' 數據庫連接 '''
    #
    #     self.db = pymysql.connect(self.host,self.username,self.password,self.port,self.database)
    #
    #     # self.cursor = self.db.cursor()
    #
    #     return self.db





    def insertDB(self,sql):
        ''' 插入數據庫操作 '''

        self.cursor = self.db.cursor()

        try:
            # 執行sql
            self.cursor.execute(sql)
            # tt = self.cursor.execute(sql)  # 返回 插入數據 條數 可以根據 返回值 判定處理結果
            # print(tt)
            self.db.commit()
            print('執行成功')
        except:
            # 發生錯誤時回滾
            self.db.rollback()
            print('執行失敗')
        finally:
            self.cursor.close()




    def deleteDB(self,sql):
        ''' 操作數據庫數據刪除 '''
        self.cursor = self.db.cursor()

        try:
            # 執行sql
            self.cursor.execute(sql)
            # tt = self.cursor.execute(sql) # 返回 刪除數據 條數 可以根據 返回值 判定處理結果
            # print(tt)
            self.db.commit()
        except:
            # 發生錯誤時回滾
            self.db.rollback()
        finally:
            self.cursor.close()





    def updateDb(self,sql):
        ''' 更新數據庫操作 '''

        self.cursor = self.db.cursor()

        try:
            # 執行sql
            self.cursor.execute(sql)
            # tt = self.cursor.execute(sql) # 返回 更新數據 條數 可以根據 返回值 判定處理結果
            # print(tt)
            self.db.commit()
        except:
            # 發生錯誤時回滾
            self.db.rollback()
        finally:
            self.cursor.close()





    def selectDb(self,sql):
        ''' 數據庫查詢 '''
        self.cursor = self.db.cursor()
        try:
            self.cursor.execute(sql) # 返回 查詢數據 條數 可以根據 返回值 判定處理結果

            data = self.cursor.fetchall() # 返回所有記錄列表

            print(data)

            # 結果遍歷
            for row in data:
                sid = row[0]
                name = row[1]
                # 遍歷打印結果
                print('sid = %s,  name = %s'%(sid,name))
        except:
            print('Error: unable to fecth data')
        finally:
            self.cursor.close()


    def closeDb(self):
        ''' 數據庫連接關閉 '''
        self.db.close()



if __name__ == '__main__':

    DbHandle = DataBaseHandle('127.0.0.1','username','password','dbname',3306)

    sql = "insert into JdwSpider(image_name,image_url,Spider_time) values ('%s','%s','%s')" % (
    '1', '2', '2018-12-04 15:25:21')
    DbHandle.insertDB(sql)
    # DbHandle.insertDB('insert into test(name) values ("%s")'%('FuHongXue'))
    # DbHandle.insertDB('insert into test(name) values ("%s")'%('FuHongXue'))
    # DbHandle.selectDb('select * from test')
    # DbHandle.updateDb('update test set name = "%s" where sid = "%d"' %('YeKai',22))
    # DbHandle.selectDb('select * from test')
    # DbHandle.insertDB('insert into test(name) values ("%s")'%('LiXunHuan'))
    # DbHandle.deleteDB('delete from test where sid > "%d"' %(25))
    # DbHandle.selectDb('select * from test')
    DbHandle.closeDb()

 

 以上代碼實現了一個簡單的注冊頁面，並將注冊信息存放到數據庫表中。

 

啟動項目演示

 

 打開瀏覽器輸入url：http://127.0.0.1:8000/index/

 

點擊注冊提交按鈕，頁面跳轉如下

 

查看數據庫表，可以看到新增的用戶信息。