>SUN自己也实现了JDO了吗？ Sun only provide a Reference Implementation which is not for research purpose.>现在那个工具包实现jdo比较好的？ Lots of them if u go to google and search "jdo".However,all of them are commercial products.Castor is a JDO open source project but it is not Sun JDO spec compliant.I am developing a JDO as well. :-) Hopefully it could come up at the end of this year
>问一下关于数据库服务器的信息呢？ Sun JDO是用文件系统来做数据库的。所以他的FOStorePMF(File system Persistence Manager Factory)是用文件系统来保存数据。这个实验不需要关系数据库
Sun only provide a Reference Implementation which is not for research purpose.>现在那个工具包实现jdo比较好的？
Lots of them if u go to google and search "jdo".However,all of them are commercial products.Castor is a JDO open source project but it is not Sun JDO spec compliant.I am developing a JDO as well. :-) Hopefully it could come up at the end of this year
Sun JDO是用文件系统来做数据库的。所以他的FOStorePMF(File system Persistence Manager Factory)是用文件系统来保存数据。这个实验不需要关系数据库