Error: this type needs one of the following values('true','false')

Question

I'm trying to use <c:if> in a jsp (in Workshop 8.1), as in:
               <c:if test="1 == 1">
          <!-- something here -->
          </c:if>
          But, I get the following message when I hover over the error indicator
          at the test:
          Error: this type needs one of the following values('true','false')
          It will actually work if I do:
               <c:if test="true">
          <!-- something here -->
          </c:if>
          but, of course, that's useless.
          Am I missing something here?

Answer 1

David Karr wrote:
          > The value of the "test" attribute needs to be an Expression Language expression. Try changing it to "${1 == 1}", and that should work.
          Actually, I had tried that, and it would have worked that way if I had
          the right taglib declaration -- I had accidentally left in the rt
          versions, so a <%= test %> type of expression worked.
          But, that's not the way I wanted to do it, so I put the non-rt versions
          in, along with tld and jar files that I had in some other directories,
          then it worked fine. In the process, when searching my hard drive for
          standard.jar, I noticed I had four or five different versions, each with
          a slightly different size. Of course, I had to tinker, and downloaded
          the zip from Apache, figuring it would be best to have a matched set of
          tlds and jars.
          And now I get an error that the matching class cannot be found:
          > ERROR: response.jsp:1: Package org.apache.taglibs.standard.tag.el.core contains no member type of this name.
          and
          > ERROR: response.jsp:14: The tag handler class was not found "org.apache.taglibs.standard.tag.el.core.IfTag".
          But, if I navigate the standard .jar that is in my WEB-INF/lib
          directory, lo and behold, there is the file IfTag.class in what appears
          to be the correct package.