Hibernate调用带返回值的存储过程的方法

?CallableStatement?statement?=?getSession().connection().prepareCall(
????????????????"{call?sp_get_keyword_code(?,???,??,?,??)}");
????????statement.setString(1,?parentCode);
????????statement.setInt(2,?2);
????????statement.setString(3,?"W");
????????statement.setInt(4,?1);
????????statement.registerOutParameter("out_code",?Types.VARCHAR);
????????statement.executeUpdate();
????????String?keycode?=?statement.getString("out_code");