How can we append 2 strings in Struts

Question

I need to append 2 String class variables using Struts 2

I tried like this

<s:set var="Name" value="#variable1+#variable2"/>

but no result.

Answer 1

Use OGNL to force evaluation of concatenation operation

<s:set var="Name" value="%{#variable1 + #variable2}"/>

Answer 2

it is also working.

<s:set var="Name" value="#variable1+''+#variable2"/>