Java中的JDO(JSR 243)和SDO(JSR 235)有什么区别；哪些开源提供程序集可用于这些Java规范

解决方法:

从this article开始：

[…] JDO looks at the persistence
issue only […] whereas SDO is more general and represents data that can flow
between any J2EE tier, such as between a presentation and business
tier.

EclipseLink是一个SDO提供程序,Apache’s DB project是一个JDO实现.