问ExpressJS如何构建应用程序？

| my-application

| -- app.js

| -- config/

     | -- environment.js

     | -- routes.js

这是我的代码：

app.js

var express = require('express');

var app = module.exports = express.createServer();

require('./config/environment.js')(app, express);

require('./config/routes.js')(app);

app.listen(3000);

配置/ environment.js

module.exports = function(app, express){

    app.configure(function() {

    app.use(express.logger());

    });

    app.configure('development', function() {

    app.use(express.errorHandler({

        dumpExceptions: true,

        showStack: true

    }));

    });

    app.configure('production', function() {

    app.use(express.errorHandler());

    });

};

配置/ routes.js

module.exports = function(app) {

    app.get('/', function(req, res) {

    res.send('Hello world !');

    });

};