映射异常: An association from the table TBL_TRAIN_COURSE_MONTH_PLAN refers to an unm

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class最好写全包路径，不然会出现以上错误的

Caused by: org.hibernate.MappingException: An association from the table TBL_TRAIN_COURSE_MONTH_PLAN refers to an unmapped class: com.sencloud.dh.oa.action.basedata.TrainCourse
?? ?at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configuration.java:1067)
?? ?at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:989)
?? ?at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:932)
?? ?at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:673)
?? ?at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
?? ?at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1369)
?? ?at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1335)
?? ?... 41 more