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4: Developing applications

4: Developing applications

For IBM WebSphere Application Server, applications are combinations of building blocks that work together to perform a business logic function.

Web applications are groups of one or more servlets, plus static content.

Web applications = servlets + JSP files + XML files + HTML files + graphics

WebSphere Application Server's programming model is based on Sun's JavaTM2 Platform, Standard Edition (J2SE) software. The J2SE environment provides the basis for building network-centric enetprise applications that run on a variety of systems. The J2SE software consists of the JavaTM2 SDK, Standard Edition and the JavaTM2 Runtime Environment (JRE), Standard Edition.

The J2SE environment provides the foundation for the J2EE model, which packages enterprise and Web applications into new categories of Web Archive Resource files or WAR files and Enterprise Archive Resource files or EAR files. The J2EE model is fully implemented in WebSphere Application Server version 4.0. See the product site for more information.

View the supported specification levels for servlet, JSP, and EJB APIs at the WebSphere Application Server prerequisites Web site.

See article 4.1 to review the WebSphere application programming model and environment, including information on various tools to help you develop and test your application components.

Consult sections 4.2 and 4.3 for a focus on developing Web applications and enterprise beans, respectively.

View the Related information links to help you bring these building blocks together, adding personalization, and other features.

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