Question

I use struts2 and want to use Math.max method in struts tag .
Like this :

<s:property value="%{Math.max( 1 , 5 ) }" />

Or :

<s:set var="pfrom" value="%{Math.max( 1 , page - 5 )}" /> 

but this codes not work .

Answer 1

See the docs for accessing static properties.

Nutshell: %{@java.lang.Math@max(...)}

You’ll need to configure allowing static access in your Struts config file:

<constant name="struts.ognl.allowStaticMethodAccess" value="true" />

I’d urge you to do work like that in the action, though, when possible. “Dumb” views are easier to test–the more logic in the controllers the easier things are all around.

The same logic could be exposed as an action method.