How to update session attribute

Question

I have some session attributes being saved. I have a jsp page on which a call to a servlet is made through. This servlet updates one of the session variable but I am not able to

Answer 1

To access the abc variable in the JSP try:

${sessionScope.abc}

Also note that removing before setting is usually redundant. So:

request.getSession().removeAttribute("abc");
request.getSession().setAttribute("abc", abc);

Can simply become:

request.getSession().setAttribute("abc", abc);