Prentice Hall and Sun Microsystems. Personal use only; do not redistribute.

220

Chapter 9 Session Tracking

Figure 9 6

Result of OrderPage servlet after several additions and changes to the 

order.

Behind the Scenes: Implementing the Shopping 

Cart and Catalog Items

Listing 9.6 gives the shopping cart implementation. It simply maintains a

Vector

 of orders, with methods to add and update these orders. Listing 9.7

shows the code for the individual catalog item, Listing 9.8 presents the class

representing the order status of a particular item, and Listing 9.9 gives the

catalog implementation. 

Second edition of this book: www.coreservlets.com; Sequel: www.moreservlets.com.

Servlet and JSP training courses by book's author: courses.coreservlets.com.