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JAVA-SERVLET

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Servlets are used for Server-Side Programming. Servlets are generic extensions to Java-enabled servers. Their most common use is to extend Webservers, providing a very secure, portable and easy-to-use replacement for CGI. A Servlet is a dynamically loaded module that services requests from a Webserver. It runs entirely inside the Java Virtual Machine.

SALIENT FEATURES

• Processing data posted over https using an HTML form, including purchase order or credit card data. A servlet like this could be part of an order-entry and processing system, working with product and inventory databases, and perhaps an on-line payment system.

• Allowing collaboration between people. A servlet can handle multiple requests concurrently; they can synchronize requests to support systems such as on-line conferencing.

• Forwarding requests. Servlets can forward requests to other servers and servlets. This allows them to be used to balance load among several servers that mirror the same content. It also allows them to be used to partition a single logical service over several servers, according to task type or organizational boundaries.
• Being a community of active agents. A servlet writer could define active agents that share work among each other. Each agent would be a servlet, and the agents could pass data among themselves

APPLICATION

• Create JDBC connection pool.
• Create an Online Catalog System.
• Developing E-Commerce "store fronts" will become one of the most common uses for Java servlets.
• Servlets can be used to deploy Websites that open up large legacy systems on the Internet.

TOPICS COVERED

• Servlet Overview & Architecture.
• Servlet Basics.
• Servlet & Html.
• SSI (Server - Side Include).
• Servlet chaining.
• Servlet & the JDBC.
• Servlet Beans.
• Javaserver Pages.
• Servelets as Distributed Object Clients.
• Servlet Session.