我在文件的末尾导出router，同时也导出一个函数，但我一次只能让其中一个函数工作。

// weather.js
var express = require('express');
var router = express.Router();

refreshWeather(){
// Refresh weather...
}

exports = router; // It's either this
exports.refresh = function() { // or this.
    refreshWeather();
    console.log('Done refreshing');
};

从我的主app.js，我希望能够做到这两点：

//app.js
var express = require('express');
var app = express();

var weather = require('./routes/weather.js');

app.use(weather) // I want to be able to use this for routing
weather.refresh(); // But also be able to call refresh function of weather.js