Application Of The Distributed Component Object Technology Based On EJB

J2EE is the developping direction of the enterprise computing in future and that EJB is the core technology for J2EE. EJB is one of the JAVA middleware, it is the component model on the JAVA application platform. In this discourse, I will analyzing the general situation of the EJB and discourse upon the framework of the EJB in detail. We also detail the role in the EJB.I discourse upon the session bean entity bean message-driven bean through their life cycle persistence state and interaction with client apart. Emphasizing to analyse the session bean and entity bean. Have a detail research in applacation life cycle and type of the session bean. Compare of the difference between stateful session bean and stateless session bean. Discussing the two types of entity bean: BMP and CMP through the view of persistence management.At last, giving a example-Design and realizing of the information system of Students selecting the lesson-for describing how to design a whole system based on EJB. EJB technology can improve the efficiency of developing and increase system dependability.