interpolated runtime values error

Posted on 2005-04-29
Medium Priority
Last Modified: 2008-01-09
Anyone know what this JSP error message means?

Stack = com.caucho.jsp.JspParseException: /admin/grantReport/displayReport.jsp:12: interpolated runtime values are forbidden by the JSP spec at `reportByVolunteer.jsp?grantNumber=&certificateNumber=' at com.caucho.jsp.JspGenerator.error(JspGenerator.java:1577) at com.caucho.jsp.JspGenerator.hasRuntimeAttribute(JspGenerator.java:1397) at ...

The error is occurring on the following "<jsp:forward..." lines.

The objectionable code follows:

      String grantNumber = request.getParameter("grantNumber");
      String position = request.getParameter("position");

      if (position == null || position.equals("")) { %>
          <jsp:forward page="reportByVolunteer.jsp?grantNumber=<%= grantNumber %>&certificateNumber=<%= request.getParameter('certificateNumber') %>" />
<%      } else { %>
          <jsp:forward page="reportByPosition.jsp?grantNumber=<%= grantNumber %>&position=<%= position %>" />
<%      } %>

If I replace the variables with constants, the page works. I can see in the URL address bar that the variables are being passed correctly. ie ...?grantNumber=grant4&certificateNumber=&position=Webmaster&Submit=Submit
Question by:softechnics
  • 4
LVL 18

Accepted Solution

bobbit31 earned 1000 total points
ID: 13897070
what happens if you do as such:

String s = "reportByVolunteer.jsp?grantNumber=<%= grantNumber %>&certificateNumber=<%= request.getParameter('certificateNumber') %>";

     if (position == null || position.equals("")) { %>
         <jsp:forward page="<% s %>" />
LVL 18

Expert Comment

ID: 13897073
oops,  <jsp:forward page="<%= s %>" />
LVL 18

Expert Comment

ID: 13897088
oops again,

String s = "reportByVolunteer.jsp?grantNumber=" + grantNumber + "&certificateNumber=" + request.getParameter('certificateNumber');
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Author Comment

ID: 13897572
Damned! It worked!! Why?????

I'm doing something very similar in another application and my original approach above works there!
LVL 19

Expert Comment

ID: 13897592
as far as I know jsp never liked tags inside <jsp:forward..
LVL 18

Expert Comment

ID: 13897636
yeah, i've noticed the same... that request.getParameter(..) in the jsp:forward tag is what made me suggest the solution i did.

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