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The Servlets trail teaches you about servlets, the bodies of code that run inside servers, and extend their functionality. For example, servlets offer an efficient platform-independent replacement for CGI scripts. Servers that can host servlets are Java-enabled servers that respond to client requests.
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Overview of Servlets
tells you what servlets are, and how you can use them. The lesson also
introduces the example servlets used in this trail.
Client Interaction
shows you how to write servlets that interact with clients. The servlets
in this lesson respond to HTTP GET, HEAD and POST requests. The lesson
also discusses threading issues, and shows you how to avoid problems by
creating a servlet that responds to one client at a time.
The Life Cycle of a Servlet
discusses the significant events in the life of a servlet and shows you how to
customize servlet initialization and shutdown.
Saving Client State
shows you how to use session tracking and cookies.
Servlet Communication
shows you how to have your servlet communicate with other servlets and
other resources, such as CGI scripts.
Running Servlets
describes how to test your servlets with Tomcat and
the Java Servlet Development Kit (JSDK) version 2.1.
Calling Servlets
shows you how to call servlets from a browser and within an HTML page.
Note: Java Servlet technology is a standard extension to the Java 2 Platform, Standard Edition. The Tomcat 3.x and 4.0 implementations support the 2.2 and 2.3 versions of Java Servlet technology. You can download Tomcat from http://java.sun.com/products/servlet/download.htmlThe JSDK supports the 2.1 version of Java Servlet technology. The JSDK is available from http://java.sun.com/products/servlet/archive.html
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