blocks|key|3646680|text|虽然这不一定是一个问题，但它很烦人，而且，即使您可以绕过它，and错误也是一个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3646681|尽管您可以引用其他节点模块，即使它们不在节点目录中，但据我所知，node要求模块必须位于Nodejs目录下的node_modules文件夹中，以便自动找到它们。(我在osx上也遇到过类似的问题，这个方法解决了它。)|offset|length|style|CODE|3646682|尝试移动的内容|3646683|进入C:\Program+Files\Nodejs\node_modules\的C:\Username\node_modules|3646684|Alternatively，|BOLD|3646685|您还可以使用以下命令全局安装模块：|3646686|npm+install+express+-g|code-block|syntax|javascript|3646687|这允许你不必担心你的节点目录就可以访问它们，尽管它们更难管理，并且“如果你可以的话，你应该尽量避免”。|3646688|来自Node博客：|3646689|3646690|就像全局变量很粗糙，但在某些情况下也是必要的，全局包很重要，但如果不需要的话，最好避免使用。|blockquote|3646691|3646692|一般来说，经验法则是：|3646693|如果你正在安装一些你想在你的程序中使用的东西，使用require(‘无论什么’)，然后在本地安装它，在你的项目的根目录下。如果您要在shell中安装您想要使用的东西，请在命令行或其他地方全局安装它，以便它的二进制文件最终包含在您的PATH环境变量中。|3646694|3646695|资源|3646696|3646697|Related+SO+question/answers|unordered-list-item|3646698|The+Node+blog+post|3646699|3646700|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/5817874/node-js-npm-is-not-installing-module-in-the-default-path|1|http://blog.nodejs.org/2011/03/23/npm-1-0-global-vs-local-installation/^0|0|18|6|1I|C|0|0|2|11|14|O|0|0|D|0|0|0|0|0|0|0|0|0|0|0|0|2|0|0|0|R|0|0|0|I|1|0|0^^$0|@$1|2|3|4|5|6|7|1S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1T|8|@$D|1U|E|1V|F|G]|$D|1W|E|1X|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1Z|8|@$D|20|E|21|F|G]|$D|22|E|23|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|24|8|@$D|25|E|26|F|N]]|9|@]|A|$]]|$1|O|3|P|5|6|7|27|8|@]|9|@]|A|$]]|$1|Q|3|R|5|S|7|28|8|@]|9|@]|A|$T|U]]|$1|V|3|W|5|6|7|29|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|2A|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|2B|8|@]|9|@]|A|$]]|$1|10|3|11|5|12|7|2C|8|@]|9|@]|A|$]]|$1|13|3|-4|5|6|7|2D|8|@]|9|@]|A|$]]|$1|14|3|15|5|6|7|2E|8|@]|9|@]|A|$]]|$1|16|3|17|5|6|7|2F|8|@]|9|@]|A|$]]|$1|18|3|-4|5|6|7|2G|8|@]|9|@]|A|$]]|$1|19|3|1A|5|6|7|2H|8|@$D|2I|E|2J|F|N]]|9|@]|A|$]]|$1|1B|3|-4|5|6|7|2K|8|@]|9|@]|A|$]]|$1|1C|3|1D|5|1E|7|2L|8|@]|9|@$D|2M|E|2N|1|2O]]|A|$]]|$1|1F|3|1G|5|1E|7|2P|8|@]|9|@$D|2Q|E|2R|1|2S]]|A|$]]|$1|1H|3|-4|5|6|7|2T|8|@]|9|@]|A|$]]|$1|1I|3|-4|5|6|7|2U|8|@]|9|@]|A|$]]]|1J|$1K|$5|1L|1M|1N|A|$1O|1P]]|1Q|$5|1L|1M|1N|A|$1O|1R]]]]

Although this is not necessarily a problem, it's annoying and and error is an error even if you can navigate around it.

Although you can reference other node modules even if they are not in the node directory, as far as I understand node requires the modules to be in the <code>node_modules</code> folder within the <code>Nodejs</code> directory in order to automatically find them. (I had a similar issue on osx and this method solved it.)

Try moving the contents of 

<code>C:\Username\node_modules</code> into <code>C:\Program Files\Nodejs\node_modules\</code>

Alternatively,

You can also install modules globally with:

<pre><code>npm install express -g
</code></pre>

which allows you to access them without having to worry about your node directory, although these are then more difficult to manage and "you should try to avoid if you can".

From the Node Blog:

<blockquote>
 Just like how global variables are kind of gross, but also necessary
 in some cases, global packages are important, but best avoided if not
 needed.
 
 In general, the rule of thumb is:
 
 If you’re installing something that you want to use in your program,
 using require('whatever'), then install it locally, at the root of
 your project. If you’re installing something that you want to use in
 your shell, on the command line or something, install it globally, so
 that its binaries end up in your PATH environment variable.
</blockquote>

Resources

<ul>
<li><a href="https://stackoverflow.com/questions/5817874/node-js-npm-is-not-installing-module-in-the-default-path">Related SO question/answers</a></li>
<li><a href="http://blog.nodejs.org/2011/03/23/npm-1-0-global-vs-local-installation/" rel="nofollow noreferrer">The Node blog post</a></li>
</ul>

blocks|key|2014873|text|您应该全局安装express。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2014874|npm+install+express+-g|code-block|syntax|javascript|2014875|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You should install the express globally.

<pre><code>npm install express -g
</code></pre>

blocks|key|2014886|text|安装node.js会将C:\Users\AppData\Roaming\npm\目录添加到PATH变量。如果全局安装不能正常工作，那么一定是意外地将其删除了。运行node.js的修复-安装应该可以解决这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2014887|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Installing node.js adds the C:\Users\\AppData\Roaming\npm\ directory to your PATH variable. If the global install is not working correctly then something must have accidentally removed it. Running a repair-install of node.js should fix this issue

blocks|key|2014896|text|在以后的express版本中，命令行被迁移到一个单独的模块:+express-generetor|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2014897|使用|2014898|npm安装-g+express-generator@3|2014899|并可以使用express命令|2014900|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

In later versions of express comand line was migrated to a separate module: express-generetor 

use 

npm install -g express-generator@3 

and could use the express command

blocks|key|3558665|text|只需添加以下内容:而不是首先使用以下命令全局安装：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3558666|3558667|+npm安装express+-g|blockquote|3558668|3558669|3558670|然后移动它，就像公认的答案所说的那样(这很愚蠢)，只需简单地将其安装在node+js中：|3558671|npm+install+express|code-block|syntax|javascript|3558672|-g是全局的，你想要它在本地，这样NodeJS就可以访问它。|3558673|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|T|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|U|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|V|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|K|5|L|7|Y|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|Z|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|R|$]]

Just want to add the following: instead of first installing it globally using:

<blockquote>
 npm install express -g
</blockquote>

And then moving it, like the accepted answer says (which is just silly), just simply install it within node js:

<pre><code>npm install express
</code></pre>

-g is for global, you want it locally so NodeJS can access it.

I have installed Node.js through the installer on their webpage and added it's path to my environment variable so I can use <code>node</code> and <code>npm</code> through the command line. If I make an express app, it works, but I have to create it manually.

This is fine I guess, but I was wondering why I can't use the <code>express</code> command? I am getting

<pre><code>`express` is not recognized as an internal or external command, operable program or batch file.
</code></pre>

I noticed that express installs in C:\Username\node_modules instead of where I thought it would go, in C:\Program Files\Nodejs\node_modules. Is this a problem?

Issues with installing Express.JS in Windows 7

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我已经通过他们网页上的安装程序安装了Node.js，并将它的路径添加到我的环境变量中，这样我就可以通过命令行使用node和npm。如果我制作了一个express应用程序，它可以工作，但我必须手动创建它。我想这很好，但是我想知道为什么我不能使用express命令？我得到了`express` is not recogniz...

问在Windows7中安装Express.JS的问题
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