使用装饰器配置路由的

 

上面的 “Hello World” 修改以下：

# tornadoapp.py import tornado.ioloop import tornado.web class Application(tornado.web.Application): def route(self, pattern): def _(handler): handler_pattern = [(pattern, handler)] self.add_handlers(".*$", handler_pattern) return handler return _ app = Application() @app.route(r"/") class MainHandler(tornado.web.RequestHandler): def get(self): self.write("Hello, world") if __name__ == "__main__": app.listen(8888) tornado.ioloop.IOLoop.instance().start()