How to implement if-else logic

<c:choose>
<c:when test="${pageControl.adCategory == 'health'}">
 ...
</c:when>
<c:when test="${pageControl.adCategory == 'travel'}">
 ...
</c:when>
<c:when test="${pageControl.adCategory == 'science'}">
 ...
</c:when>
<c:otherwise>
 ...
</c:otherwise>
</c:choose>

How to handle checkboxes in forms in Spring

<input type="checkbox" name="wantsEmail" id="signup-checkbox" value="true" <c:if test="${signupCredentials.wantsEmail == true}">checked</c:if> >

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