How to use if, else condition in jsf to display image

jsf-2 jstl
pravi picture pravi · Jul 11, 2013 · Viewed 178.9k times · Source

I have a condition where I have an enrollment form in which if userid is 0 it should show the dummy image and when I edit user from any update, I check for if userid which is not equal to 0 then display the image corresponding to userid.

I used JSTL inside jsf page. But always it tries to go to else loop for showing image. The functionality is working fine. The only thing is I can't display the dummy image when I visit the page first. Here s my code.:

<c:if test="${'#{user.userId}' == '0'}">
  <a href="Images/thumb_02.jpg" target="_blank" ></a>
  <img src="Images/thumb_02.jpg" />
</c:if>
<c:otherwise>
  <a href="/DisplayBlobExample?userId=#{user.userId}" target="_blank"</a>
  <img src="/DisplayBlobExample?userId=#{user.userId}" />
</c:otherwise>

Can I use this JSTL tag or can I do it using jsf?

Answer

jmkgreen picture jmkgreen · Apr 2, 2014

For those like I who just followed the code by skuntsel and received a cryptic stack trace, allow me to save you some time.

It seems c:if cannot by itself be followed by c:otherwise.

The correct solution is as follows:

<c:choose>
    <c:when test="#{some.test}">
        <p>some.test is true</p>
    </c:when>
    <c:otherwise>
        <p>some.test is not true</p>
    </c:otherwise>
</c:choose>

You can add additional c:when tests in as necessary.

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