public static String normalize(CharSequence str) {
		return Normalizer.normalize(str, Normalizer.Form.NFC);
	}
@Test
	public void normalizeTest() {
		// https://blog.csdn.net/oscar999/article/details/105326270

		String str1 = "\u00C1";
		String str2 = "\u0041\u0301";

		assertNotEquals(str1, str2);

		str1 = CharSequenceUtil.normalize(str1);
		str2 = CharSequenceUtil.normalize(str2);
		assertEquals(str1, str2);
	}