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Struts & Hibernate
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| | | Const in JSTL | Const in JSTL 2004-02-12 - By Mark Roth
Back
Hi Arun,
There is no direct way to access constants in the EL. Here are a few
alternatives:
1. Create a Map in the application scope and put all the constants in
there. (e.g. ${myConstantsMap.SOME_CONST})
2. Create a bean that implements java.util.Map  and have it look up
constants (e.g. ${constantsBean.MyConstants.SOME_CONST} would call
constantsBean.get( "MyConstants" ). This would return a Map containing
key/value pairs for the costants in MyConstants). This is not hard to
write and could be done using introspection.
3. Create a function that looks up the constants (e.g. ${fn:constants(
"MyConstants.SOME_CONST" )} ). Again, The function would use introspection.
We're looking into making this easier in a future version of the JSP
specification.
Hope this helps.
---
Mark Roth, Java Software
JSP 2.0 Co-Specification Lead
Sun Microsystems, Inc.
Karthik Arun wrote:
> hi All
>
> How can I use a Const (final static) member of a class MyConstants in JSTL??
> I would like to do something like this:
>
> <c:if test="${state == MyConstants.SOME_CONST}" >
> <c:set value="${stateCode + '<br><b>' + singleObjToProcess.stateStr +
> '</b><br>'}" var="stateCode" />
> </c:if>
>
> where SOME_CONST is a const in MyConstants class.state is a loop iterating
> variable, stateCode is some member variable of singleObjToProcess object
> that is in the page scope.
>
> Can somebody let me know how I can use the constant in the JSTL..????
>
> Regards,
> Arun Karthik R
>
>
>
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===========================================================================
To unsubscribe: mailto listserv@(protected) with body: "signoff JSP-INTEREST".
For digest: mailto listserv@(protected) with body: "set JSP-INTEREST DIGEST".
Some relevant archives, FAQs and Forums on JSPs can be found at:
http://java.sun.com/products/jsp
http://archives.java.sun.com/jsp-interest.html
http://forums.java.sun.com
http://www.jspinsider.com
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