初始化專案

新建一個資料夾，執行 npm init 初始化專案

mkdir wqs_node
cd wqs_node
npm init

按照提示輸入一些專案的相關資訊

D:\web\node>cd wqs_node

D:\web\node\wqs_node>npm init
This utility will walk you through creating a package.json file.
It only covers the most common items, and tries to guess sensible defaults

See `npm help
 
 json` for definitive documentation on these fields
and exactly what they do.

Use `npm install <pkg> --save` afterwards to install a package and
save it as a dependency in the package.json file.

Press ^C at any time to quit.
name: (okadaGo)
Sorry, name can no longer contain capital letters.
name: (okadaGo) okada_go
version
 
: (1.0.0)
description:
entry point: (index.js)
test command:
git repository:
keywords:
author:
license: (ISC)
About to write to D:\web\node\okadaGo\package.json:

{
  "name": "wqs_node",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
 

  },
  "author": "",
  "license": "ISC"
}


Is this ok? (yes)

D:\web\node\wqs_node>

目錄結構

建立三個資料夾：public、routes 和 views。

專案的檔案結構如下

├─models/
├─public/
├─routes/
├─views/
├─index.js
└─package.json

對應檔案及資料夾的用處：

• models 存放操作資料庫的檔案
• public 存放靜態檔案，如 css、圖片等
• routes 存放路由檔案
• views 存放模板檔案
• index.js 程式主檔案
• package.json 儲存專案的資訊，比如專案名、描述、作者、依賴等

安裝依賴

安裝 express 框架

npm install express --save

啟動專案

進入專案的根目錄，建立一個 index.js 檔案，並加入如下程式碼

var express = require('express');
var app = express();

app.get('/', function(res, rep) {
    rep.send('Hello, word!');
});

app.listen(3000);

然後在控制檯中輸入

node index.js