jstl tip

if else 처리는

<c:choose>

  <c:when test="${pageContext.request.scheme eq 'http'}">

    This is an insecure Web session.

  </c:when>

  <c:when test="${pageContext.request.scheme eq 'https'}">

    This is a secure Web session.

  </c:when>

  <c:otherwise>

    You are using an unrecognized Web protocol. How did this happen?!

  </c:otherwise>

</c:choose>

숫자 포멧팅

<% request.setAttribute("price" , "1234567"); %>
<fmt:formatNumber value="${price}" pattern="#,###" />

fn 사용

http://blog.naver.com/ldbina/120067579003

custom tag 사용

http://sunfuture.springnote.com/pages/3539297