EJB - EAR, JAR and WAR - What is the difference between EAR, JAR and WAR file?

What is the difference between EAR, JAR and WAR file?

- Modules are packaged based on their functionality as EAR, JAR and WAR files.

1. JAR files (.jar): Modules which contain EJB class files and EJB deployment descriptor are packed as JAR files.

2. WAR Files (.war): Web modules which contain servlet class files, JSP files, supporting files, GIF and HTML files are packaged as JAR file.

3. EAR Files (.ear): ‘.jar’ & ‘.war’ files are packaged as JAR files. ‘Ear’ stands for enterprise archive. These files are deployed in the application server.
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