一、安装node.js
1.前往node.js官网下载并安装工具，这里安装路径选到D盘，D:\software\nodejs
安装完毕后在命令行输入以下命令测试是否安装成功，正确会出现版本号
npm -v
2.改变原有的环境变量，
(1)配置npm的全局模块的存放路径以及cache的路径，例如两个文件夹放在NodeJS的主目录下，便在NodeJs下建立node_global及node_cache两个文件夹，输入以下命令改变npm配置
npm config set prefix "D:\software\nodejs\node_global"
npm config set cache "D:\software\nodejs\node_cache"
(2)在命令行输入npm list -global,可以查看目录是否已经改变
D:\software\nodejs\node_global
(3)在系统环境变量添加系统变量NODE_PATH，输入路径D:\software\nodejs\node_global\node_modules，此后所安装的模块都会安装到改路径下
(4)在命令行输入以下命令试着安装express（注：-g这个参数意思是装到global目录下，也就是上面说设置的D:\software\nodejs\node_global里面。）
npm install express -g
安装完毕后可以看到.\node_global\node_modules\express已经有内容
(5)在命令行输入
node进入编辑模式，输入以下代码测试是否能正常加载模块：
require('express')
结果：
> require('express')
[Function: createApplication] {
application: {
init: [Function: init],
defaultConfiguration: [Function: defaultConfiguration],
lazyrouter: [Function: lazyrouter],
handle: [Function: handle],
use: [Function: use],
route: [Function: route],
engine: [Function: engine],
param: [Function: param],
set: [Function: set],
path: [Function: path],
enabled: [Function: enabled],
disabled: [Function: disabled],
enable: [Function: enable],
disable: [Function: disable],
acl: [Function],
bind: [Function],
checkout: [Function],
connect: [Function],
copy: [Function],
delete: [Function],
get: [Function],
head: [Function],
link: [Function],
lock: [Function],
'm-search': [Function],
merge: [Function],
mkactivity: [Function],
mkcalendar: [Function],
mkcol: [Function],
move: [Function],
notify: [Function],
options: [Function],
patch: [Function],
post: [Function],
propfind: [Function],
proppatch: [Function],
purge: [Function],
put: [Function],
rebind: [Function],
report: [Function],
search: [Function],
source: [Function],
subscribe: [Function],
trace: [Function],
unbind: [Function],
unlink: [Function],
unlock: [Function],
unsubscribe: [Function],
all: [Function: all],
del: [Function],
render: [Function: render],
listen: [Function: listen]
},
request: IncomingMessage {
header: [Function: header],
get: [Function: header],
accepts: [Function],
acceptsEncodings: [Function],
acceptsEncoding: [Function],
acceptsCharsets: [Function],
acceptsCharset: [Function],
acceptsLanguages: [Function],
acceptsLanguage: [Function],
range: [Function: range],
param: [Function: param],
is: [Function: is],
protocol: [Getter],
secure: [Getter],
ip: [Getter],
ips: [Getter],
subdomains: [Getter],
path: [Getter],
hostname: [Getter],
host: [Getter],
fresh: [Getter],
stale: [Getter],
xhr: [Getter]
},
response: ServerResponse {
status: [Function: status],
links: [Function],
send: [Function: send],
json: [Function: json],
jsonp: [Function: jsonp],
sendStatus: [Function: sendStatus],
sendFile: [Function: sendFile],
sendfile: [Function],
download: [Function: download],
type: [Function: contentType],
contentType: [Function: contentType],
format: [Function],
attachment: [Function: attachment],
append: [Function: append],
header: [Function: header],
set: [Function: header],
get: [Function],
clearCookie: [Function: clearCookie],
cookie: [Function],
location: [Function: location],
redirect: [Function: redirect],
vary: [Function],
render: [Function: render]
},
Route: [Function: Route],
Router: [Function] {
param: [Function: param],
handle: [Function: handle],
process_params: [Function: process_params],
use: [Function: use],
route: [Function: route],
acl: [Function],
bind: [Function],
checkout: [Function],
connect: [Function],
copy: [Function],
delete: [Function],
get: [Function],
head: [Function],
link: [Function],
lock: [Function],
'm-search': [Function],
merge: [Function],
mkactivity: [Function],
mkcalendar: [Function],
mkcol: [Function],
move: [Function],
notify: [Function],
options: [Function],
patch: [Function],
post: [Function],
propfind: [Function],
proppatch: [Function],
purge: [Function],
put: [Function],
rebind: [Function],
report: [Function],
search: [Function],
source: [Function],
subscribe: [Function],
trace: [Function],
unbind: [Function],
unlink: [Function],
unlock: [Function],
unsubscribe: [Function],
all: [Function]
},
json: [Function: json],
query: [Function: query],
raw: [Function: raw],
static: [Function: serveStatic] {
mime: Mime {
types: [Object: null prototype],
extensions: [Object: null prototype],
default_type: 'application/octet-stream',
Mime: [Function: Mime],
charsets: [Object]
}
},
text: [Function: text],
urlencoded: [Function: urlencoded]
}
二、安装淘宝npm（cnpm）
1.安装cnpm
(1)输入以下命令
npm install -g cnpm --registry=https://registry.npm.taobao.org
(2)添加系统变量path的内容
安装完cnpm 后，cnpm文件夹会在D:\software\nodejs\node_global\node_modules生成
但是命令行的文件却生成在
D:\software\nodejs\node_global下
所以要将CNPM_PATH作为变量名，D:\software\nodejs\node_global作为变量值添加到系统变量中。然后一定要重启命令行，不然不会生效。
然后再在命令行中运行cnpm -v,有结果就证明大功告成了！
[npm安装删除模块以及cnpm淘宝镜像]
npm安装模块
$ npm install xxx 利用 npm 安装xxx模块到当前命令行所在目录；
$ npm install -g xxx 利用npm安装全局模块xxx；
npm 删除模块
$ npm uninstall xxx 删除xxx模块；
$ npm uninstall -g xxx 删除全局模块xxx；
参考：
