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EAR

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What is an EAR file?

An EAR file is a special JAR packaging file for deploying J2EE applications to an application server. Typically an EAR contains the following files:

• A manifest file with an .MF extension
• A deployment descriptor file named application.xml
• A WAR file that contains either ejb jars in case of using EJB or a WAR file that contains jsp/servlets andor html files/images
• If EJBs are use dwith connetors, an RAR resource adaptter aRchive file

An EAR file has an .ear extension and is also a JAR standard archive file. Thus, while the JAR tool is used to create this special JAR, other tools are used to collect the files that go into this archive file and configure the deployment descriptor files and etc.

Resources

Sun's J2EE Technology Center

SUN's Packager Tool J2EE Tutorial Entry


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