Question

Is there a way to get which JSP is currently rendered, with JSTL or Struts (or without)? like _ _ file _ _ in Python and PHP?

Answer 1

Well … yes … in a way

String __jspName = this.getClass().getSimpleName().replaceAll("_", ".");

I’m using a JSP called pre.jsp for that which I include at the top of each JSP in my webapp:

<%@page import="org.apache.log4j.Logger"%>
<%
    String __jspName = this.getClass().getSimpleName().replaceAll("_", ".");

    Logger log = Logger.getLogger(this.getClass().getName());
    log.info("BEGIN JSP "+__jspName);
%>
<!-- BEGIN <%=__jspName %> -->

Plus I put this at the end of each JSP:

<!-- END <%=__jspName %> --><% log.info("END JSP "+__jspName); %>

That gives me a consistent log. To make sure each JSP is "correct", I have a check in my build script which just looks for the two strings "/pre.jsp" and “END <%=__jspName`.

Note: There are many characters which are allowed in file names but not in Java class names. If you use them, your class names might look weird. If that’s the case, I suggest to create a static helper function which converts class names to File names and call that, i.e.

String __jspName = MyJspUtils.getFileName(this.getClass());

Each JSP compiler has it’s own rules; here is one example: http://itdoc.hitachi.co.jp/manuals/3020/30203Y0510e/EY050044.HTM

Kudos go to Marcus Junius Brutus for pointing that out.