absolute paths not recommended in jsps

答案网址：https://stackoverflow.com/questions/15759549/jsp-absolute-paths

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

jsp

intellij-idea

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asked Apr 2 '13 at 8:37

sidlejinks

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Because IntelliJ is smart enough to realize that you should always use a path that's relative to the root of your web context. – duffymo Apr 2 '13 at 8:40

So there is no strict rule to use only relative or context-based paths? – sidlejinks Apr 2 '13 at 8:45

There are no rules, my friend. Write it any way you want and live with the consequences. – duffymo Apr 2 '13 at 9:15

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up vote 19 down vote accepted

Consider the following code in your JSP:

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

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

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

So you should change the URL in your JSP to:

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

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

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answered Apr 2 '13 at 9:08

Uooo

4,30752657

Thank you very much indeed for explanation! – sidlejinks Apr 2 '13 at 9:45

This didn't work at all for me. It just rendered files with the path looking something like: localhost:8080/profile/$%7BpageContext.request.context%7D/cs‌s/profile/ – Matt Powell Jul 17 '13 at 20:36

@MattPowell seems like your expression ${...} did not get evaluated right. Some frameworks require to use #{...} instead, did you try that? – Uooo Jul 22 '13 at 5:46

@w4rumy Thanks. It turns out I was using an outdated version of JSP. Once I updated to the latest version, the syntax worked correctly. – Matt Powell Jul 22 '13 at 15:42

Probably we can just write path/to/script.js without any prepending slash or context variable, am I right? – ieXcept Apr 9 '16 at 18:17

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