JSP绝对路径 [英] JSP absolute paths

问题描述

有人可以解释为什么不建议在JSP中使用绝对路径（例如，IntelliJ IDEA向我显示警告）？

Could someone explain why absolute paths not recommended to use in JSP (e.g., IntelliJ IDEA show me a warning)?

推荐答案

在JSP中考虑以下代码：

Consider the following code in your JSP:

<script src="/path/to/script.js" />

您在 www.example.com 在servlet上下文 myContext 中，您的脚本将由浏览器查找

And you deploy your application on www.example.com in servlet context myContext, your script will be looked up by the browser in

www.example.com/path/to/script.js

但是，浏览器找不到脚本。实际可以找到它的URL包含servlet上下文以及URL的一部分：

However, the browser will not find the script. The URL where it can actually be found containts the servlet context as well as part of the URL:

www.example.com/myContext/path/to/script.js

因此，您应该将JSP中的URL更改为：

So you should change the URL in your JSP to:

<script src="${pageContext.request.contextPath}/path/to/script.js" />

然后，URL中也提供了上下文路径，一切正常。

Then the context path is also available in the URL and everything will work fine.

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