public void addOrder(Order... orders) {
		this.orders = ArrayUtil.append(this.orders, orders);
	}
@Test
	public void addOrderTest() {
		Page page = new Page();
		page.addOrder(new Order("aaa"));
		assertEquals(page.getOrders().length, 1);
		page.addOrder(new Order("aaa"));
		assertEquals(page.getOrders().length, 2);
	}