13 // view engine setup
14 app.set('views', path.join(__dirname, 'views'));
15 //app.set('view engine', 'ejs');
16 app.engine('html', require('ejs').renderFile);
17 app.set('view engine', 'html');

　　修改完成后，重命名views/index.ejs为views/index.html。重启服务，访问成功。

修改后报错：

Error: Cannot find module 'html'
at Function.Module._resolveFilename (module.js:325:15)
at Function.Module._load (module.js:276:25)
at Module.require (module.js:353:17)
at require (internal/module.js:12:17)
at new View (D:\project\wellcloud\nodejs-demo\node_modules\express\lib\view.js:78:30)
at EventEmitter.render (D:\project\wellcloud\nodejs-demo\node_modules\express\lib\application.js:569:12)
at ServerResponse.render (D:\project\wellcloud\nodejs-demo\node_modules\express\lib\response.js:961:7)
at D:\project\wellcloud\nodejs-demo\app.js:54:7
at Layer.handle_error (D:\project\wellcloud\nodejs-demo\node_modules\express\lib\router\layer.js:71:5)
at trim_prefix (D:\project\wellcloud\nodejs-demo\node_modules\express\lib\router\index.js:310:13)

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