Struts 2 dynamic variables

Question

I\'m trying to create a dynamic variable in Struts2 using set tag

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Answer 1

You can use parenthesesized expression to evaluate result of the expression.

<s:if test="#number(0) == 9">
  <s:property value="%{#number(0)}" />
</s:if>

Look at the Expression Evaluation of the OGNL language guide.

Answer 2

It seems like a workaround but you can use attr to evaluate string.

<s:set var="myNum" value="numConst" />
<s:set var="number" value="'@xxx.CommonConstant@'+#myNum" />

<s:property value="#attr[#number]"/>

<s:if test="#attr[#number] == 9">
  do something
</s:if>