hi there, can anyone tell me what exactly is the difference between an .ear, .jar and a .war file. i have a good idea about the ,jar file but dont know what exactly is contained in a .ear file. anyone has any idea? any worth while link will also do nicely. cheers, ali.
An .ear file is an enterprise archive file and is associated with application assembly. http://java.sun.com/j2ee/j2ee-1_4-pfd-spec.pdf (search for .ear) To quote: "The Application Assembler takes a set of components developed by Application Component Providers and assembles them into a complete J2EE application delivered in the form of an Enterprise Archive (.ear) file. The Application Assembler will generally use GUI tools provided by either a Platform Provider or Tool Provider. The Application Assembler is responsible for providing assembly instructions describing external dependencies of the application that the Deployer must resolve in the deployment process." A .war files is a web archive file. This is used for deployment, e.g. you create a war file into which you place your jsp, servlets, beans, images, etc. You then deploy that to tomcat/jrun/websphere and they create an application from that war