The session problem in sendRedirect

[qian jianhua]

Hello,

I'm now encounting a problem on session when redirecting to a .html file using a servlet.

 

There involve three servlets. In the first one, I create a session using the following codes:

  HttpSession session = req.getSession(true);
  Integer logined = (Integer)session.getValue("login.flag");
     if (logined == null)
     {
      Integer tmpint=new Integer(0);
      session.putValue("login.flag", tmpint);

      session.putValue("register.flag","0");

        }

 

Then, in the second one, I get the "register.flag" from the session and if its value is "0", I set the URL to redirect to a register.html. The code is: res.sendRedirect(".../register.html"). The URL string is the absolute URL.

 

Well, the second servlet is running well. I get the register.html through redirecting. In the register.html, I have a form, which action is the third servlet. In the third servlet, I try to get the "login.flag" and "register.flag" from the session, but the result is "null". The testing showed that the session created in the third servlet is new.

 

I wonder whether the redirect action cause the session to disappear. How to solve the problem?

Could anyone give me a help?

Great thanks.

 

Qian Jianhua

1999.5.20