Assembling Application for Deployment

Application Server primarily supports the J2EE model wherein applications are packaged in the form of an enterprise archive (EAR) file (extension .ear). The application is further subdivided into a collection of J2EE modules, packaged into Java archives (JAR, extension .jar) for EJBs and web archives (WAR, extension .war) for servlets and JSPs.

All the JSPs and Servlets must be packaged into WAR file, all EJBs into the JAR file and finally the WAR and the JAR file together with the deployment descriptors in to the EAR file. This EAR file is a deployable component.