node.js開發指南中出現的問題 has no method 'router'解決辦法

var express = require('express')

  , routes = require('./routes')

  , user = require('./routes/user')

  , http = require('http')

  , path = require('path')

  , MongoStore = require("connect-mongodb")

  , settings = require("../settings");

var app = express();

app.configure(function () {

    app.set('port', process.env.PORT || 3000);

    app.set('views', __dirname + '/views');

    app.set('view engine', 'jade');

    app.use(express.favicon());

    app.use(express.logger('dev'));

    app.use(express.bodyParser());

    app.use(express.methodOverride());

    app.use(express.cookieParser());

    app.use(express.session({

        secret: settings.cookiesSecret,

        store: new MongoStore({

            db: settings.db

        })

    }))

    app.use(app.router);//保留原來的

    //app.use(express.router(routes));//node.js開發指南上面的（註釋掉）

    app.use(express.static(path.join(__dirname, 'public')));

});

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

    app.use(express.errorHandler());

});

routes(app);//這個是新加的

http.createServer(app).listen(app.get('port'), function () {

    console.log("Express server listening on port " + app.get('port'));

});

module.exports = function (app) {

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

        res.render('index', { title: "首頁" });

    });

    app.get("/reg", function (req, res) {

        res.render('reg', { title: "用戶註冊" });

    });

轉自http://blog.sina.com.cn/s/blog_62fda93c0101e408.html