ear, jar and war are standard application deployment archive files. As they are considered standard therefore any kind of application server is well aware that how to deploy or unpack them.
An EAR file (standard JAR file) has an “.ear” extension, which is also known as Enterprise Archive file. J2EE application along with its modules is delivered into EAR file. Other JAR files couldn’t be present in JAR files. However, WAR and EAR files possess JAR files. An EAR file has all WARs and
Updated 01-15-2012 at 08:32 AM by J2EE