django中请求处理方式有2种：FBV（function base views） 和 CBV（class base views）,换言之就是一种用函数处理请求，一种用类处理请求。

FBV

# url.pyfrom django.conf.urls import url, includefrom mytest import views urlpatterns = [    url(r‘^index/‘, views.index),]# views.pyfrom django.shortcuts import render  def index(req):    if req.method == ‘POST‘:        print(‘method is :‘ + req.method)    elif req.method == ‘GET‘:        print(‘method is :‘ + req.method)    return render(req, ‘index.html‘)

 

CBV

# urls.pyfrom mytest import views urlpatterns = [    # url(r‘^index/‘, views.index),    url(r‘^index/‘, views.Index.as_view()),]# views.pyfrom django.views import View class Index(View):    def get(self, req):        print(‘method is :‘ + req.method)        return render(req, ‘index.html‘)     def post(self, req):        print(‘method is :‘ + req.method)        return render(req, ‘index.html‘)# 注：类要继承 View ，类中函数名必须小写。

# cbv 模式下继承了django的view类# 在请求来临的时候，会调用继承类的 dispatch 方法# 通过反射的方法它会去调用自己写的视图函数, 那么这便是一个切入点，可以在自己的 cbv 视图中，重写这个方法。 class View(object):    def dispatch(self, request, *args, **kwargs):        # Try to dispatch to the right method; if a method doesn't exist,        # defer to the error handler. Also defer to the error handler if the        # request method isn't on the approved list.        if request.method.lower() in self.http_method_names:            handler = getattr(self, request.method.lower(), self.http_method_not_allowed)        else:            handler = self.http_method_not_allowed        return handler(request, *args, **kwargs)