Special Edition Using Java™ 2 Enterprise Edition

Forcing a New Session

When you call the getSession method to retrieve the current session, the request object automatically creates a session if one doesn't already exist. In some JSP implementations, the session is created automatically even if you never use it. Most of the time, you don't really care when the session has been created. Other times, however, you need to explicitly reset the existing session and start over.

Suppose, for example, that you have implemented an online shopping site. A user logs on, visits a few pages, and selects several items to buy. You store these items in the user's session as they travel from page to page. Now, suppose that the user decides that she doesn't want any of these items, and rather than go through ...