org.hibernate.hql.ast.QuerySyntaxException per is not mapped [from Per as p]
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org.hibernate.hql.ast.QuerySyntaxException per is not mapped [from Per as p]
1.hql语句查寻的是javabean 与javabean名字相同,注意大小写!
2.hibernate.cfg.xml中要有<mapping resource="bbs/BBSManager.hbm.xml" />之类的语句
注意:from Per as p 中的Per是持久类名称而不是实际数据中表的名称!
1、持久类写错了，要不就是写成了数据库表名
2、hibernate3.0不支持select中嵌套查询，据说from中也不行，只支持where中嵌套查询，好像3.1支持了select中嵌套
3、sql语句中字段是用了保留关键字
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