Question

I am printing some values on a JSP from session using < bean:write /> successfully. But after submitting the page if I come back (after session expiry) and refresh page it print complete strack trace on the page saying;

< session attribute name> not found in session scope.

To avoid this I have done 2 things. But nothing worked for me.

1. I had wrapped < bean:write /> inside < logic:empty />
2. In the starting of the page I just checked whether value of < session attribute name> is null. If so, I am redirecting it to error page.

Same problem I am facing if I add attributes in request instead of session.

< request attribute name> not found in request scope.

Code from JSP to check session

HttpSession sess = request.getSession(false); 
if (sess == null) {response.sendRedirect("errorpg.jsp");} 
else{
    String sessionId_Logon = (String) sess.getAttribute("attrName");
    if(sessionId_Logon == null)
    {
            response.sendRedirect("errorpg.jsp");
    }
}

I know that “else” block is sense less. I had tried it alone as well.

Answer 1

Well! I had found the problem i guess. < bean:write /> is getting compiled before than anything else. So my external checking for session is sense less.

Now i have 2 solutions;

1. Either i dont use < bean:write /> . Instead i can use scriptlet
2. Or I Can check for session validity on some page upper in hirarchy
   like some master page.

I am using the second one.