JSTL notes

A few notes for a few common JSTL things so I don’t forget:

taglibs:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>

Conditionals:

<c:choose>
  <c:when test=””>
  </c:when>
  <!--other when conditions -->
  <c:otherwise>
  </c:otherwise>
</c:choose>

String replace using replace function:

${fn:replace(foo, '"', '\"')}

This next tip for using a loop varStatus to build HTML ids is from: http://stackoverflow.com/questions/6600738/use-jstl-foreach-loops-varstatus-as-an-id

<c:forEach items="${loopableObject}" var="theObject" varStatus="theCount">
  <div id="divIDNo${theCount}">
  </div>
</c:forEach>

This unexpectedly gives:

<div id="divIDNojavax.servlet.jsp.jstl.core.LoopTagSupport$1Status@5570e2">

To get the actual varStatus id you need to use:

${theCount.index} gives value from 0
${theCount.count} gives value from 1

For example:

<div id="divIDNo${theCount.index}">

 

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