尝试
http://localhost:3001/default.css。
要
/styles在您的请求URL中使用：
app.use("/styles", express.static(__dirname + '/styles'));查看此页面上的示例：
//Serve static content for the app from the "public" directory in the application directory. // GET /style.css etc app.use(express.static(__dirname + '/public'));// Mount the middleware at "/static" to serve static content only when their request path is prefixed with "/static". // GET /static/style.css etc. app.use('/static', express.static(__dirname + '/public'));
