hibernate连接mysql 问题

我改了所以的xml文件了 没有问题了 但是又出了这样一个

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
org.hibernate.MappingException: duplicate property mapping: customerbases
at org.hibernate.mapping.PersistentClass.checkPropertyDuplication(PersistentClass.java:414)
at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:404)
at org.hibernate.mapping.RootClass.validate(RootClass.java:192)
at org.hibernate.cfg.Configuration.validate(Configuration.java:984)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1169)
at com.erp.domain.Test.main(Test.java:13)
这是怎么回事 解决不了 请高手帮忙啊
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duplicate property mapping: customerbases

重复的属性映射
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附件里有xml和bean 我新学的 不该熟悉 目录还在乱呢 各位别笑话啊

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