Jstl determine if the string is empty C label <c:if> determine if the parameter is empty

C Label <c:if> Determine if the parameter is empty

<c:if test= "${empty str}" > str to NULL </c:if>

<c:if test= "${not empty str}" > str NOT NULL </c:if>

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<c:foreach var= "menu" items= "${servicedetail}" varstatus= "status";
<div class= "Serviceitem" url= "${ Menu.url} "Data-name=" ${menu.name} "data-icon=" ${menu.icon} "data-menuid=" ${menu.menuid} ";
<div class=" Icon ",

</div>
<c:choose> ;
<c:when test= "${empty menu.menuid}";
<div class= "savemenuiconfunction";
< ; img src= "/easweb/img/tbtn_collection2.png"/>
</div>
</c:when>
<c:otherwise& Gt　　　　　　
<div class= "savemenuiconfunction";

</div>
</c:otherwise>
</c:choose>
<div class= "icon_function";
<p Tit Le= "${menu.name}" >${MENU.NAME}</P>
</div>
</div>
</c:foreach>

Jstl Determines whether the string is empty C label <c:if> determines whether the parameter is empty