public boolean addStudent(Student stu) {
		String insert = "INSERT INTO STUDENT VALUES(?,?,?,?,?,?,?)";
		int n = 0;
		try {
			PreparedStatement ps = conn.prepareStatement(insert);
			ps.setString(1, stu.no);
			ps.setString(2, stu.name);
			ps.setString(3, stu.sex);
			ps.setDate(4, stu.birthday);
			ps.setString(5, stu.address);
			ps.setString(6, stu.tel);
			ps.setString(7, stu.email);
			n = ps.executeUpdate();

			ps.close();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return n == 1;
	}