I need to develop a java non ee (standard) component/library/jar that can be used for java ee or se applications to realize business logic

I need to develop a java non ee (standard) component/library/jar that can
be used for java ee or se applications to realize business logic

I need to develop a java non ee (standard) component/library/jar that can
be used for java ee or se applications to realize business logic. I've
thought in to develop a java application that use JPA by eclipselink
however it depends on persistence.xml and when i use it on web jee
application creates many conflicts by the libraries dependences and the
version of JPA supports, etc... Which can be one good idea for develop
this component?