python ==> Django.view(登录，注册，个人页)

Django-views

1.本篇博客主要是想实现一个：通过Django创建一个项目，目的：三个界面，用户登录界面，用户注册界面，用户登录成功之后的个人页。本篇功能很简单，就是简单的时间页面的跳转，主要以练习为主。

首先：我们先把项目创建好，这里我创建的Django的项目名为：mysite_views,并且创建一个应用项目：app01. 两种创建方式：

一：图形界面

python ==> Django.view(登录，注册，个人页)

二：命令行

注意：要在对应的目录路径下创建。

创建项目名： django-admin startproject 项目名称 mysite_views

创建一个应用： python manage.py startapp 应用名称 app01

注意：同时装了两个版本的pycharm，创建一个应用要用 python3 manage.py startapp 应用名称 app01

创建好之后，对应的目录格式如下图：

python ==> Django.view(登录，注册，个人页)

然后：展示下各主要文件的代码。

urls.py ：映射关系

"""mysite_views URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/1.11/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.conf.urls import url, include
    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import url
from django.contrib import admin
from app01 import views              #导入模块

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^login.html/',views.login),       　　　　　　　　　　#用户登录
    url(r'^register.html/',views.register),                   # 用户注册
    url(r'^index.html',views.index)                            #登录成功之后的个人页   
]

views.py: 视图逻辑处理

from django.shortcuts import render,HttpResponse,redirect

# Create your views here.

# 1.登录
def login(request):
    print('----------------------------------->',)
    if request.method == "POST":
        username = request.POST.get("user")
        password = request.POST.get("pwd")
        print('----------------------------------->',username,password)
        import pymysql
        # 连接数据库
        conn = pymysql.connect(host="" ,port=3306,user="root",passwd="",db="s6")
        # 创建游标
        cur=conn.cursor()
        sql = "select * from userinfo where name = '%s' and password = '%s'" %(username,password)
        ret = cur.execute(sql)
        print('----------------------------------->')
        if ret:
            print('----------------------------------->login')
            return redirect ("/index.html/?name=%s"%username)
        else:
            return render(request,"login.html")


    # 3.跳转页面
    # return HttpResponse('ok')
    return render(request,"login.html")

# 2注册
def register(request):
    if request.method == "POST":
        # 1.取数据
        username = request.POST.get("user")
        passwd = request.POST.get("pwd")
        # 2.存放数据库
        import pymysql
        # # 连接数据库
        conn = pymysql.connect(host='', port=3306, user='root', passwd='', db='s6')  # db：库名
        # # 创建游标
        cur = conn.cursor()
        sql = "select * from userinfo where NAME='%s' AND password='%s'" % (username, passwd)
        ret = cur.execute(sql)
        if ret:
            return render(request,"register.html")
        else:
            ss = 'insert into userinfo (name,password) value ("%s","%s")' % (username, passwd)
            print(ss)
            cur.execute(ss)
            conn.commit()
            # 关闭指针对象
            cur.close()
            # 关闭连接对象
            conn.close()
            return redirect("/login.html/")
        # 3.跳转页面
        return redirect("/login.html/")
    return render(request,"register.html")

# 3.个人页
def index(request):
    # print("GET", request.POST)
    # user = request.GET.get("username")
    # n = user
    # print(request.get_full_path())
    ret = request.GET.get('name')
    print(request.GET.get('name'))
    # return HttpResponse('ok')
    return render(request,"index.html",{"n":ret})

templates下的前端页面：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>login</title>
</head>
<body>

<form action="" method="post">
    <h1>登录页面</h1>
    <p>用户名<input type="username" name="user"></p>
    <p>密码&nbsp &nbsp<input type="password" name="pwd"></p>
    <input type="submit" value="登录">
</form>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>注册</title>
</head>
<body>
<form action="/register.html/" method="post">
    <h1>注册页面</h1>
    <p>用户名<input type="text" name="user"></p>
    <p>密码&nbsp &nbsp<input type="password" name="pwd"></p>
    <input type="submit" value="确认注册">
</form>
</body>
</html>

　　index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Title</title>
</head>
<body>
<h1>Hello   {{ n }}
    welcome come to plase! </h1>
</body>
</html>

注意事项：

　　setting里的配置文件：

python ==> Django.view(登录，注册，个人页)