public static String cleanComment(String xmlContent) {
		if (xmlContent == null) {
			return null;
		}
		return xmlContent.replaceAll(COMMENT_REGEX, StrUtil.EMPTY);
	}
@Test
	public void cleanCommentTest() {
		final String xmlContent = "<info><title>hutool</title><!-- 这是注释 --><lang>java</lang></info>";
		final String ret = XmlUtil.cleanComment(xmlContent);
		assertEquals("<info><title>hutool</title><lang>java</lang></info>", ret);
	}