Django之URL路由

1.URL配置

基本格式 :

HttpResponse # 返回的是字符串
render #模板渲染 模板就是html页面 渲染就是字符串替换

在Django2中:

from django.contrib import admin
from django.urls import  path,re_path
from  app01  import  views

urlpatterns = [
    path('admin/', admin.site.urls),
    re_path('^index/', views.index),
]

正则表达式：一个正则表达式字符串
views视图函数：一个可调用对象，通常为一个视图函数或一个指定视图函数路径的字符串

示例

urls.py

from django.contrib import admin
from django.urls import  path,re_path
from  app01  import  views

urlpatterns = [
    path('admin/', admin.site.urls),
    re_path('^login/',views.login), #路径分发   不区别请求方法
]

views.py

from django.shortcuts import render ,HttpResponse

# Create your views here.

def login(request):
    print('请求方法',request.method)
    if request.method == 'GET':
        return render(request,"login.html")
    else:
        print(request.POST) #{'username': ['zbb'], 'pwd': ['222']}>
        name = request.POST.get("username")
        pwd = request.POST.get("pwd")
        if name == 'zbb' and pwd == '123':
            return HttpResponse("登录成功")
        else:
            return HttpResponse("登录失败")

# 'django.middleware.csrf.CsrfViewMiddleware', #注释才能接收post

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>追梦NAN变成了大叔</h1>
<form action="" method="post">
    用户名:<input type="text" name="username">  
    密码: <input type="text" name="pwd">
    <input type="submit">
</form>

</body>

</html>

2.正则表达式

分组命名匹配

request #request  后面跟着分组正则里面的参数

urls

from django.contrib import admin
from django.urls import  path,re_path
from  app01  import  views

urlpatterns = [
    path('admin/', admin.site.urls),
    re_path('^login/',views.login),
    # 无名分组参数
    re_path('article/(d+)/(d+)/',views.article), #位置传参
    #有名分组参数
    re_path('dd/(?P<xx>d+)/(?P<oo>d+)/',views.dd)
    #是关键字传参
]

views

def article(request,year,moth):
    return  HttpResponse(year+"年"+moth+'月')

def dd(request,xx,oo):
    return  HttpResponse(xx+oo+'月')
#第一个参数必须是request，后面跟的三个参数是对应着上面分组正则匹配的每个参数的

访问

http://127.0.0.1:8000/article/1/2/
http://127.0.0.1:8000/dd/1/2/