Java: Returning a relative URL from a Java class?

Question

I have some images stored in /images the problem is that i wish to return a url like so from a class.

/images/test.png

The problem is that in my development machine my url is in the form of

http://localhost/myApp

and in production its in the form of

http://www.mysite.com

so i can't just return /images as this doesn't work on the development machine

I suppose what i am trying to do in Java is the same as teh JSTL tag does

<c:url

So when i am in my development machine it would return

/myApp/images/test.png

and in production

/images/test.png

can anyone help?

Thanks in advance

Related: http://stackoverflow.com/questions/3655316/browser-cant-access-css-and-images-when-calling-a-servlet-which-forwards-to-a-j/3658735#3658735 — BalusC, Feb 22 '12 at 17:26

score 3 · Answer 1 · answered Feb 22 '12 at 16:51

3

${request.contextPath}/images/foo

You're probably looking for the context path.

answered Feb 22 '12 at 16:51

McDowell

score 1 · Accepted Answer · answered Feb 22 '12 at 16:55

1

You need to use getContextPath() method on the ServletRequest - and then append the rest of your path:

String url = request.getContextPath() + "/images/test.png";

answered Feb 22 '12 at 16:55

Aleks G

Thanks, but its a standard java STATIC method hence i don't have request, is there a work around? – Martin Feb 22 '12 at 17:06
I don't think it's possible. Only the actual request knows what the context path is. You need to design your method in such a way as to give it access to the `request` or possibly pass the value of `request.getContextPath()` into that method as a "base path". – Aleks G Feb 22 '12 at 17:09

2 Answers2