Research and Implementation of Web Instruction Platform Based on J2EE
Zhi Jun Ding · Journal of Changzhou Institute of Technology · 2007
This paper proposes the web instruction platform based on J2EE multi-tier structure,aiming to solve some problems in other present web instruction platforms,such as indefinite tier structure,obscure logic assignment,weak expandability etc.Meanwhile,the system applies MVC pattern to develop J2EE component,which divides data storage and logical transaction.When the system is implemented,some J2EE design patterns are used to improve its stability and security.Firstly,the platform introduces Session Facade pattern,which uses a session bean as a facade to encapsulate entity bean,to improve the capability of data storage.Secondly,Business Delegate is combined with Service Locator,which is located between session facade and command object,to separate web request from logic disposal.