jsp - <c:choose> not interpreted, all <c:when> and <c:otherwise> bodies are evaluated -

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i wanna show state of user when logged in web site. found out better use el tags. didnt work. please me.

<c:choose>       <c:when test="${null}" >         ${"welcome unknown user"}     </c:when>      <c:otherwise>         <c:out> ${"welcome dear"} ${sessionstateuser} </c:out>     </c:otherwise>  </c:choose>

i don't think c:choose -> c:when block constructed correctly. also, why texts referenced variables?

it should more this:

<c:choose>      <c:when test="${sessionstateuser == null}" >        welcome unknown user     </c:when>     <c:otherwise>        welcome dear <c:out value="${sessionstateuser}"/>     </c:otherwise> </c:choose>

i don't see reason need line: var= "test" value = "${sessionstateuser}" - in case, naming variable test confusing because jsp test attribute.


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