hibernate调用oracle 存储过程

Session session = HibernateSessionFactory.getSession();
Transaction tx = session.beginTransaction();
Connection conn = session.connection();
String proc = "call insertUser(?,?)";
CallableStatement cs = conn.prepareCall(proc);
cs.setString(1, "LINRZ");
cs.setString(2, "REMARK");
cs.execute();
tx.commit();