EclipseLink 默认不允许作为主键的int,long型值为0
http://wiki.eclipse.org/Using_EclipseLink_JPA_Extensions_(ELUG)#Allowing_Zero_Value_Primary_Keys
EclipseLink 默认不允许作为主键的int,long型值为0
http://wiki.eclipse.org/Using_EclipseLink_JPA_Extensions_(ELUG)#Allowing_Zero_Value_Primary_Keys