J2EE Platform
The previous section described the core technology components of the J2EE platform, such as servlet, JSP, EJB, JDBC, and JMS. In this section, we take a look at the J2EE architecture model and describe other aspects of the J2EE platform that complete the platform definition.
J2EE Architecture
The J2EE architecture is a multitiered architecture. See Figure 2.1.
Figure 2.1. J2EE architecture
The J2EE architecture consists of the following tiers:
Client tier— The client tier interacts with the user and displays information from the system to the user. The J2EE platform supports different types of clients, including HTML clients, Java ...
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