@Insert("INSERT INTO user (username, password, id,role, name, tel, email) VALUES (#{username},#{password},#{id},#{role},#{name},#{tel}, #{email})")
    public int saveUser(User user);

@Override
    public boolean save(User user) {
        TransactionFactory transactionFactory = new JdbcTransactionFactory();
        Transaction transaction = null;
        int i = 0;
        try {
            transaction = transactionFactory.newTransaction(MyBatisUtil.getSession().getConnection());
            System.out.println(MyBatisUtil.getSession().getConnection());
            i = userDao.saveUser(user);
            transaction.commit();
        } catch (Exception e) {
            e.printStackTrace();
            try {
                transaction.rollback();
            } catch (SQLException e1) {
                System.out.println("事务回滚异常！");
                e1.printStackTrace();
            }
        }
        return i > 0;
    }