웹개발 뉴비인데 c:choose 질문좀요

[웹개발 뉴비(211.203)]

<c:choose>
        <c:when>
             <c:when>  
                  <c:if>
                  </c:if> 
             </c:when>
             <c:otherwise>
             </c:otherwise>
        </c:when>
        <c:otherwise>
             <c:when>
                  <c:if>
                  </c:if> 
             </c:when>
             <c:otherwise>
             </c:otherwise>
        </c:otherwise>
</c:choose>

 

jstl요딴식으로 쓰면 안먹힘???

when안에 when넣은 후 부터 갑자기 에러뜨는데 ㅠㅠ