hibernate 也用找id

Connection poolConn=session.connection();
???? PreparedStatement? ptmta =? poolConn.prepareStatement("select SEQ_ACDM_TACHE_NUM.nextval from dual");
???? ResultSet rs = ptmta.executeQuery();
???? String id=null;
???? if(rs.next()){
???? rs.getString(1);
?????????? id=rs.getString(1);
???? }