There are several different types of deployment description modules in J2EE: 1.Web: A web module encloses to deploy a compilant source file, resource file, and department that a web application needs.
Description file .2.ejb: An EJB module encloses a source file, resource file, and deployment description file that deploys an EJB. 3.Application Client: An application client contains a customer pointing to one or more enterprises
The source file, resource file, and deployment description required for the terminal application .4.connector: A Connector module contains the resource adapter and deployment description file to facilitate the connection specified
An existing enterprise information system (EIS) in the server .5.application: An Application module can enclose any type of J2EE module and package them into one
A single application contains its own deployment description file.
