spring-orm 管理jdo 出现问题

NestedThrowablesStackTrace:
The class "com.josnleo.jlcms.model.Admin" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found.
org.datanucleus.exceptions.ClassNotPersistableException: The class "com.josnleo.jlcms.model.Admin" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found.

spring-orm 管理jdo 出现这个错误
GAE下....麻烦那个大哥给点提示...我快疯了

页面提示java.lang.nullpointerexception的错误

com.josnleo.jlcms.model.Admin
不能持久化,是不是这个类的hbm配置或annotation里面有错