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Asked: 2026-05-11T01:52:34+00:00

I have a JAR file for authorization. I need it for each of my

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I have a JAR file for authorization. I need it for each of my WAR files. All the WAR files are packaged in an EAR file. Do I have to repeat this common JAR in every WAR, or is there a structure for common libraries?

So my example looks something like this…

big.ear   - META-INF     - MANIFEST.MF     - application.xml   - appl1.war     - META-INF       - MANIFEST.MF     - WEB-INF       - web.xml       - lib         - unique1.jar         - unique2.jar         - unique3.jar         - common1.jar     - jsps/html/etc   - appl2.war     - META-INF       - MANIFEST.MF     - WEB-INF       - web.xml       - lib         - unique3.jar         - unique4.jar         - common1.jar     - jsps/html/etc   - appl3.war     - META-INF       - MANIFEST.MF     - WEB-INF       - web.xml       - lib         - unique5.jar         - common1.jar     - jsps/html/etc

Each of my WAR applications can see common1.jar, but it is in the EAR three times.

Where in the EAR structure could I put common1.jar so that appl1, appl2, and appl3 could see it without repeating it three times?

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1 Answer

  1. The standard way is to put the JARs at the root of your EAR and reference them in the Class-Path attribute of the WARs’ META-INF/MANIFEST.MF. See this article.

    Check your container’s documentation to make sure it is supported.

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