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public Long getallcount()    {       Long count=new Long(0);       String sql="select count(answer.id) from Answer as answer";       Query query=super.getSession().createQuery(sql);       

hibernate.cfg.xml 中hibernate.hbm2ddl.auto配置节点如下：      Hibernate Reference Documentation 3.3.1解释如下：Automatically validate or export schema DDL to the database when the SessionFactory is created.With