public static boolean isDouble(String s) {
		if (StrUtil.isBlank(s)) {
			return false;
		}
		try {
			Double.parseDouble(s);
		} catch (NumberFormatException ignore) {
			return false;
		}
		return s.contains(".");
	}
@Test
	public void isDoubleTest(){
		assertFalse(NumberUtil.isDouble(null));
		assertFalse(NumberUtil.isDouble(""));
		assertFalse(NumberUtil.isDouble("  "));
	}