v0.12.7
安裝express模塊npm install express
執行express app命令
報錯：
`express` is not recognized as an internal or external command, operable program or batch file.
原因是：最新版本的express，命令行功能已經轉移到模塊express-generetor，需要單獨安裝．
使用如下命令
npm install -g express-generator
進入app文件夾中，執行app,使用命令node app這時候會報錯，因為第一次使用express框架的話，缺少很多必備的modules
D:\work\workspace\test\nodeJS\express_demo\app>node app.js
module.js:338
throw err;
^
Error: Cannot find module 'serve-favicon'
at Function.Module._resolveFilename (module.js:336:15)
at Function.Module._load (module.js:278:25)
at Module.require (module.js:365:17)
at require (module.js:384:17)
at Object.<anonymous> (D:\work\workspace\test\nodeJS\express_demo\app\app.js:3:15)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
依次安裝需要的Module
npm install serve-favicon
npm install morgan
npm install cookie-parser
npm install body-parser
npm install debug
npm install jade
安裝完成所有必備的modules后，在此執行app，項目根目錄下npm start命令還是報下面的錯誤：
Error: Cannot find module 'jade'
at Function.Module._resolveFilename (module.js:336:15)
at Function.Module._load (module.js:278:25)
at Module.require (module.js:365:17)
at require (module.js:384:17)
at new View (D:\work\workspace\test\nodeJS\node_modules\express\lib\view.js:78:30)
at EventEmitter.render (D:\work\workspace\test\nodeJS\node_modules\express\lib\application.js:569:12)
at ServerResponse.render (D:\work\workspace\test\nodeJS\node_modules\express\lib\response.js:961:7)
at D:\work\workspace\test\nodeJS\express_demo\app\app.js:53:7
at Layer.handle_error (D:\work\workspace\test\nodeJS\node_modules\express\lib\router\layer.js:71:5)
at trim_prefix (D:\work\workspace\test\nodeJS\node_modules\express\lib\router\index.js:310:13)
最后發現了原因 ，這個Jade必要放在express 的Modules目錄下面。CD到這個目錄并install.
D:\work\workspace\test\nodeJS\node_modules\express\node_modules>npm install jade
然后再回到之前的目錄并啟動
D:\work\workspace\test\nodeJS\express_demo\app>npm start
這回沒問題了，
D:\work\workspace\test\nodeJS\express_demo\app>npm start
> app@0.0.0 start D:\work\workspace\test\nodeJS\express_demo\app
> node ./bin/www
GET / 200 373.915 ms - 170
GET /stylesheets/style.css 200 3.740 ms - 111
瀏覽器輸入 http://127.0.0.1:3000/
會出現
Welcome to Express