您可以将您的persistence.xml连同您的实体类一起放入一个单独的jar文件中，并将其放入您的EAR的/ lib文件夹中。

You can put your persistence.xml along with your entity classes into a separate jar that you put in the /lib folder of you EAR.

yourEar.ear
    |
    |_ yourEjb.jar
    |
    |_ yourWeb.war
    |
    |_ lib
        |
        |_ yourPersistence.jar
               |
               |_ META-INF/persistence.xml
               |
               |_ yourEntity.class