文档如下:Theapp.VERB()methodsprovidetheroutingfunctionalityinExpress,whereVERBisoneoftheHTTPverbs,suchasapp.post().Multiplecallbacksmaybegive,allaretreatedequally,andbehavejustlikemiddleware,withtheoneexceptionthatthesecallbacksmayinvokenext('route')tobypasstheremainingroutecallback(s).Thismechanism