当其他jsp的javascript第3次或第4次访问时，在index.jsp中设置的会话变量返回null

Question

The project is using Spring Framework.

1. Is there a way to extend the session variable timeout ?
2. To make session variable accessible throughout the website ? I don't want to set the session variables in the controller.

The flow is as follows :

• '/' ie "index.jsp" calls "country.html" if session variable is set to null.
• the user then selects a country in "country.html" and form is submitted to "/index.jsp"
• Then "index.jsp" gets value using"request.getParameter(countryCode)" , if not null then it sets session variable using "objectSession.setAttribute("countryCode", IN);".

Uptil here there is no issue. But in i click the on other links like "/test.jsp", the javascript in "test.jsp" is returning null for

var countryCode = '<%= session.getAttribute("countryCode") %>';

Similarly if i click on "/index.jsp" it is redirecting me to "country.html" because

coun =(String) objectSession.getAttribute("countryCode");

in the scriptlet is null i guess.

Answer 1

I was using the response.SendRedirect() which was creating a new session on every attempt. Now i am using controller only but instead of redirect used ModelAndView to get to the desired page.