public static String removeAllHtmlAttr(String content, String... tagNames) {
		String regex;
		for (String tagName : tagNames) {
			regex = StrUtil.format("(?i)<{}[^>]*?>", tagName);
			content = content.replaceAll(regex, StrUtil.format("<{}>", tagName));
		}
		return content;
	}
@Test
	public void removeAllHtmlAttrTest() {
		final String html = "<div class=\"test_div\" width=\"120\"></div>";
		final String result = HtmlUtil.removeAllHtmlAttr(html, "div");
		assertEquals("<div></div>", result);
	}