public static List<String> findAll(String regex, CharSequence content, int group) {
		return findAll(regex, content, group, new ArrayList<>());
	}
@Test
	public void findAllTest() {
		// 查找所有匹配文本
		final List<String> resultFindAll = ReUtil.findAll("\\w{2}", content, 0, new ArrayList<>());
		final ArrayList<String> expected = CollectionUtil.newArrayList("ZZ", "Za", "aa", "bb", "bc", "cc", "12", "34");
		assertEquals(expected, resultFindAll);
	}