public static String get(String regex, CharSequence content, int groupIndex) {
		if (null == content || null == regex) {
			return null;
		}

		final Pattern pattern = PatternPool.get(regex, Pattern.DOTALL);
		return get(pattern, content, groupIndex);
	}
@Test
	public void getTest() {
		final String resultGet = ReUtil.get("\\w{2}", content, 0);
		assertEquals("ZZ", resultGet);
	}