This thesis is mainly focused on the Java Enterprise Edition 5
platform and the web application frameworks based on this
platform. Brief introduction to the Java EE 5 platform helps
understand the concepts used by the modern Java web application
frameworks and other powerful tools used by Java web
application developers. Some of the most widely used
request-based and component-based Java web application
frameworks are described in detail, as well as some other tools
and approaches to Java web application development. Based on
the specified requirements, a conceptual design of an online
shop web tier in Java EE is proposed. Finally, a reference
implementation of the online shop web tier following the
proposed conceptual design is provided.