官方User_guide中，3.2节 JPA Bootstrapping 第一段最后一句话，
The standardized approach has some limitations in certain environments,but aside from those,
it is highly recommended that you use JPA-standardized bootstrapping.
为什么呢？
官方User_guide中，3.2节 JPA Bootstrapping 第一段最后一句话，
The standardized approach has some limitations in certain environments,but aside from those,
it is highly recommended that you use JPA-standardized bootstrapping.
为什么呢？