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The Example Servlets

The remaining lessons in this trail show you how to write HTTP servlets. Some knowledge of the HTTP protocol is assumed; to learn more about the HTTP protocol, you could look at the RFC for HTTP/1.1.

The lessons use an example called Duke's Bookstore, a simple on-line bookstore that allows a customer to perform various functions. Each function is provided by a servlet:
 

Function	Tomcat Servlet	JSDK2.1 Servlet
Browse the books offered for sale	CatalogServlet	CatalogServlet
Buy a book by placing it in a "shopping cart"	CatalogServlet	CatalogServlet
Get more information on a specific book	BookDetailServlet	BookDetailServlet
See the books that have been selected for purchase	ShowCartServlet	ShowCartServlet
Remove one or more books from the shopping cart	ShowCartServlet	ShowCartServlet
Buy the books in the shopping cart	CashierServlet	CashierServlet
Receive a Thank-You for the purchase	ReceiptServlet	ReceiptServlet

The lessons use the servlets to illustrate various tasks. For example, the BookDetailServlet is used to show you how to handle HTTP GET requests and the CatalogServlet is used to show you session tracking.

Several source files comprise the Duke's Bookstore example. For your convenience, we include two downloadable zip archives: one contains all of the source files necessary to build and run the example using Tomcat, the other contains all of the source file necessary to build and run the example using JSDK2.1.

Download the zip archive for Tomcat

Download the zip archive for JSDK2.1

To run the example, first start a process that runs servlets, such as Tomcat or the JSDK2.1 server. Once the process is running, call the servlet from a browser.

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