http://blog.xebia.com/2009/07/13/jpa-implementation-patterns-wrap-up/ [http://blog.xebia.com/2009/07/11/jpa-implementation-patterns-testing/] 차근 차근 봐둬야 할 글목록이 있군요. Basic patterns * Data Access Objects [http://blog.xebia.com/2009/03/09/jpa-implementation-patterns-data-access-objects/] * Saving (detached) entities [http://blog.xebia.com/2009/03/23/jpa-implementation-patterns-saving-detached-entities/] * Retrieving entities [http://blog.