Oracle查询指定记录数的奇怪问题

　　首先看一段代码：　　dbo.getPreparedStatement("select * from (select * from Entity_HotLink where hotLinkSortId = ? and hotLinkStatus = ? order by hotLinkOrder ASC, lastModifiedDate DESC) where ROWNUM <= ?");　　dbo.pstmt.setInt(1