title: How can i check if an attribute is set (not null and not an empty string) with jstl?
body: <p>E.g.</p>
  
  <pre><code>&lt;c:if test="${post}"&gt;
      &lt;h3&gt;${post.title}&lt;/h3&gt;  
  &lt;/c:if&gt;
  </code></pre>