views：
from django.shortcuts import render,HttpResponse,redirect
# Create your views here.
def index(request):
print(request.path_info)
return HttpResponse('<h1>index</h1>')
# return render(request, 'index.html')
def modal(request):
return render(request, 'modal.html')
def login(request):
# 判断如果是get请求返回登录页面：
if request.method == "GET":
return render(request,"login.html")
# 否则处理post请求、获取提交数据：
else:
print(request.POST)
#获取用户名：
username = request.POST.get("user")
password = request.POST.get("password")
#用户名和密码校验：
if username == "alex" and password == "alexdsb":
#登录成功：
return redirect("/index/")
else:
return render(request,"login.html",{"error":"用户名或密码错误"})
login.html：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
{# 增加bootstrap样式：#}
<link rel="stylesheet" href="/static/plugins/bootstrap-3.3.7-dist/css/bootstrap.min.css">
{# 导入css文件：#}
<link rel="stylesheet" href="/static/css/signin.css">
</head>
<body>
<div class="container">
{# novalidate定义不校验、更改post请求、action提交到哪个地址#}
<form class="form-signin" method="post" action="" novalidate>
<h2 class="form-signin-heading">Please sign in</h2>
<label for="inputEmail" class="sr-only">用户名</label>
{# required定义必填、autofocus自动聚焦、name属性#}
<input type="text" id="inputEmail" class="form-control" name="user" placeholder="输入用户名" required="" autofocus="">
<label for="inputPassword" class="sr-only">密码</label>
<input type="password" id="inputPassword" class="form-control" name="password" placeholder="输入密码" required="">
{# 提示错误字典的key：#}
<div>{{ error }}</div>
<div class="checkbox">
<label>
<input type="checkbox" value="remember-me"> Remember me
</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit">登录</button>
{# 定义提交：#}
{# <input type="submit" value="登录">#}
</form>
</div> <!-- /container -->
<!-- IE10 viewport hack for Surface/desktop Windows 8 bug -->
<script src="../../assets/js/ie10-viewport-bug-workaround.js"></script>
</body>
</html>