JSP Programming Services

JSP is the way to separate the look and feel of the web page from the underlying business logic, so that it is web server and platform independent. This course teaches you how to use JSP to develop dynamic web sites, by exploring the syntax and components of JSP development.

Servlets Programming Services

Servlets are pieces of JavaTM source code that add functionality to a web server in a manner similar to the way applets add functionality to a browser. Servlets are designed to support a request/response computing model that is commonly used in web servers. In a request/response model, a client sends a request message to a server and the server responds by sending back a reply message.
From the Java Servlet Development Kit (JSDK), you use the Java Servlet API to create servlets for responding to requests from clients. These servlets can do many tasks, like process HTML forms with a custom servlet or manage middle-tier processing to connect to existing data sources behind a corporate firewall. In addition, servlets can maintain services, like database sessions, between requests to manage resources better than Common Gateway Interface (CGI) technologies.

Java Servlet Technology 2.3

Java Servlet technology lets you define HTTP-specific servlet classes. A servlet class extends the capabilities of servers that host applications accessed by way of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by Web servers.