Python Django 实现简单注册功能过程详解

时间:2021-04-03 人气:0

目录结构如下

编辑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
 # 实例化 数据库 连接
 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')

接下来编辑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),
]

在应用下创建templates 文件夹

并创建html文件 index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>FirstWeb</title>
</head>
<body>
 <h1>信息注册</h1>
 <!-- action="/login/" 这里是 提交后访问的路径，因此 要在 urls 添加改路径 -->
 <form action="/login/" method="post">
  {% csrf_token %}
 用户名：<input type="text" name="username" id="usn"><br>
 密 码：<input type="password" name="password" id="pwd"><br>
 <input type="submit" value="注册">
 </form>

</body>
</html>

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

介绍一下添加的common文件

添加一个数据库封装的类。

# FileName : DBHandle.py
# Author : Adil
# DateTime : 2018/11/29 2:03 PM
# SoftWare : PyCharm
import pymysql
# username : adil
# password : helloyyj
class DataBaseHandle(object):
 ''' 定义一个 MySQL 操作类'''
 def __init__(self,host,username,password,database,port):
 '''初始化数据库信息并创建数据库连接'''
 # 下面的赋值其实可以省略，connect 时 直接使用形参即可
 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')
 # 这里 注释连接的方法，是为了 实例化对象时，就创建连接。不许要单独处理连接了。
 #
 # def connDataBase(self):
 # ''' 数据库连接 '''
 #
 # 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):
 ''' 插入数据库操作 '''
 self.cursor = self.db.cursor()
 try:
  # 执行sql
  self.cursor.execute(sql)
  # tt = self.cursor.execute(sql) # 返回 插入数据 条数 可以根据 返回值 判定处理结果
  # print(tt)
  self.db.commit()
  print('执行成功')
 except:
  # 发生错误时回滚
  self.db.rollback()
  print('执行失败')
 finally:
  self.cursor.close()
 def deleteDB(self,sql):
 ''' 操作数据库数据删除 '''
 self.cursor = self.db.cursor()

 try:
  # 执行sql
  self.cursor.execute(sql)
  # tt = self.cursor.execute(sql) # 返回 删除数据 条数 可以根据 返回值 判定处理结果
  # print(tt)
  self.db.commit()
 except:
  # 发生错误时回滚
  self.db.rollback()
 finally:
  self.cursor.close()

 def updateDb(self,sql):
 ''' 更新数据库操作 '''
 self.cursor = self.db.cursor()
 try:
  # 执行sql
  self.cursor.execute(sql)
  # tt = self.cursor.execute(sql) # 返回 更新数据 条数 可以根据 返回值 判定处理结果
  # print(tt)
  self.db.commit()
 except:
  # 发生错误时回滚
  self.db.rollback()
 finally:
  self.cursor.close()
 def selectDb(self,sql):
 ''' 数据库查询 '''
 self.cursor = self.db.cursor()
 try:
  self.cursor.execute(sql) # 返回 查询数据 条数 可以根据 返回值 判定处理结果
  data = self.cursor.fetchall() # 返回所有记录列表
  print(data)
  # 结果遍历
  for row in data:
  sid = row[0]
  name = row[1]
  # 遍历打印结果
  print('sid = %s, name = %s'%(sid,name))
 except:
  print('Error: unable to fecth data')
 finally:
  self.cursor.close()
 def closeDb(self):
 ''' 数据库连接关闭 '''
 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()

以上代码实现了一个简单的注册页面，并将注册信息存放到数据库表中。

启动项目演示

打开浏览器输入url：http://127.0.0.1:8000/index/

点击注册提交按钮，页面跳转如下

查看数据库表，可以看到新增的用户信息。

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