我尝试在IntelliJ IDEA上用JDO2创建一个新的GAE/J项目,但由于以下org.datanucleus.jdo.exceptions.ClassNotPersistenceCapableException:原因,它不能很好地工作
The class "Book" 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 un