public static int[] generateRandomNumber(int begin, int end, int size) {
		// 种子你可以随意生成，但不能重复
		final int[] seed = ArrayUtil.range(begin, end);
		return generateRandomNumber(begin, end, size, seed);
	}
@Test
	public void generateRandomNumberTest2(){
		// 检查边界
		final int[] ints = NumberUtil.generateRandomNumber(1, 8, 7);
		assertEquals(7, ints.length);
		final Set<?> set = Convert.convert(Set.class, ints);
		assertEquals(7, set.size());
	}