1.404 page not found（找不到对应的页面）
2.500 server error（服务器错误）
3.400 bad request（无效的请求）
4.403 HTTP forbidden（HTTP禁止访问，权限不足）
5.200 OK （请求成功）
重新定义404模板：
book/urls.py
from django.urls import path from . import views from django.conf.urls import handler404 app_name ="book" urlpatterns = [ path('',views.index,name="index"), ] handler404=views.page_not_found
book/views.py
from django.http import HttpResponse from django.shortcuts import render,redirect,reverse from django.urls import resolve # Create your views here. def index(request): return HttpResponse("welcome") def page_not_found(request,exception=404): return render(request,template_name="404.html")
settings.py
DEBUG = False ALLOWED_HOSTS = ["*"]
404.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h1>好像出了点问题，界面消失了</h1> </body> </html>