How to set session attribute in java? [duplicate]

Question

I am able to set session attribute in scriptlet but when I am trying to set session attribute inside java class it shows error like "session cannot be resolved". So how to set session in java?

<%String username = (String)request.getAttribute("un"); session.setAttribute("UserName", username);%> 

Answer 1

By Java class, I am assuming you mean a Servlet class as setting session attribute in arbitrary Java class does not make sense.You can do something like this in your servlet's doGet/doPost methods

public void doGet(HttpServletRequest request, HttpServletResponse response) {      HttpSession session = request.getSession();     String username = (String)request.getAttribute("un");     session.setAttribute("UserName", username); } 

Answer 2

By default session object is available on jsp page(implicit object). It will not available in normal POJO java class. You can get the reference of HttpSession object on Servelt by using HttpServletRequest

HttpSession s=request.getSession() s.setAttribute("name","value"); 

You can get session on an ActionSupport based Action POJO class as follows

 ActionContext ctx= ActionContext.getContext();    Map m=ctx.getSession();    m.put("name", value); 

look at: http://ohmjavaclasses.blogspot.com/2011/12/access-session-in-action-class-struts2.html