I am making this java mail project.
so when a user logs-in a session is created through HttpSession with the following..

String uid=new java.rmi.server.UID().toString();

String uid1=java.net.URLEncoder.encode(uid);

session.setAttribute("username",uid1);.

This creates the session..

Will this create a unique Session.

sir please explain in real time websites.using java mail..
how do we create session and how to keep track of it until the user log out..

what i have done is that..i have
checked the session like this..

if (session.getAttribute("username")==null)
{
out.println("please login");
}
else
{

read message///

}

Is this the valid method...

please explain in a small sample code..