Description: In the project database layer of database access categories derived from DatabaseObject category, so only need to set up a local data connection, other places do not need to address the specific connectivity database access code. Such as: User categories Users Group responsible for access control, etc., only need a simple code you can connect and access the database of. Concrete realization of this has nothing to do with this article, to cite only one or two modules as an example.
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CommonDatabaseLink.java
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