var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(logger('dev'));
改为
// view engine setup
app.set('views', path.join(__dirname, 'views'));
//设置模板的后缀是html
app.engine('html', require('ejs').renderFile);
//指定总模板
app.set('view engine', 'html');