Python Django 实现简单注册功能

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项目创建略，可参考前期文档介绍。

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 timedef 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 ConfigurationThe `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 viewsurlpatterns = [
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>

<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 : PyCharmimport pymysql# username : adil
# password : helloyyjclass 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')" % (
'', '', '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()