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From Robert Graf-Waczenski <>
Subject Re: [S2 V2.0.14] <s:param> value attribute has rtexprvalue=false - shouldn't it be rtexprvalue=true?
Date Wed, 17 Dec 2008 11:37:27 GMT
In my example i only needed one parameter, so i was able to simply 
append my dynamic value to the url, knowing that the single parameter 
causes the url to end with "?param=", so my appended value is at the 
correct location. I know that multiple <s:param> occurrences are 
possible and cause appropriate ?param1=123&param2=abc syntax, but i was 
wondering how i would then supply the values for each of the parameters 
dynamically, i.e. dynamic values at the locations of "123" and "abc" in 
the example.

Thanks for mentioning ognl, maybe i need to have a closer look in this 
direction. Sorry if this has been asked before, but how would i access 
the value of a JSP-local variable in an ognl expression? With this, i 
would easily be able to achieve what i want. Do i have to put the 
variable value into one of the scopes that ognl is capable to access by 
default? That would be a bit ugly, but doable unless i need a complex 
iteration on my JSP, each of which would append one occurrence of <s:param>.

Further thoughts? Documentation pointers?


Nils-Helge Garli Hegvik wrote:
> I'm not quite sure if I understand your example, but there should be
> no problem having multiple <s:params> inside the url tag. I think
> rtexprvalue was disabled due to some security issues with the
> combination of ognl and rtexprval. However, you should be able to use
> ognl expressions instead.
> Nils-H
> On Wed, Dec 17, 2008 at 11:59 AM, Robert Graf-Waczenski <> wrote:
>> Hi,
>> i'm using <s:param> inside an <s:url> tag to dynamically generate the
>> appropriate url params. In my current example i only need one parameter, so
>> in order to add the parameter value dynamically to the url, i can do so
>> here:
>> <s:url><s:param name=myParam/></s:url><%=whateverObject.getBlurb()%>
>> So i have a situation were i can do what i currently need, but once i need
>> more than one parameter with dynamic values for each of them, i already see
>> that i'm running into a problem.
>> I think that the culprit is that the value= attribute of the <s:param> tag
>> is defined with rtexprvalue=false (in the tld), so trying to use a dynamic
>> value directly inside the <s:param> tag of course yields a runtime error.
>> What is the reasoning behind restricting the value= attribute to non-runtime
>> values only?
>> How would one create a url with multiple url parameters? I know how to do
>> this by hand using plain old Java code, i'd like to know what S2 has to
>> offer in this regard.
>> Robert
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