title: i can't showing value request.getParameter()
body: <p>in url = <a href="http://localhost:/test/buku.jsp?act=add" rel="nofollow noreferrer">http://localhost:/test/buku.jsp?act=add</a></p>
  
  <pre><code>&lt;%
    if(request.getParameter("act") == "add"){
      out.println(request.getParameter("act"));
    }
  %&gt;
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/GlVNR.png" rel="nofollow noreferrer">i can't showing value request.getParameter()</a></p>