Ejb Applications, Multi-tier Architecture

This thesis mainly describes the specifications , the working principle and the applications in the multi-tier architecture of EJB(Enterprise JavaBean). The components and the techniques concerned are expounded as welh As a model of developing and deploying reusable Java server-side components, EJB defines a standard programming interface for Java application servers. EJB is classified into Session Bean, Entity Bean and Message-Driven Bean, which are introduced in detail. The applications of CMP Bean and BMP Bean are explained through an example.