public static String unwrapHtmlTag(String content, String... tagNames) {
		return removeHtmlTag(content, false, tagNames);
	}
@Test
	public void unwrapHtmlTagTest() {
		//非闭合标签
		String str = "pre<img src=\"xxx/dfdsfds/test.jpg\">";
		String result = HtmlUtil.unwrapHtmlTag(str, "img");
		assertEquals("pre", result);

		//闭合标签
		str = "pre<img>";
		result = HtmlUtil.unwrapHtmlTag(str, "img");
		assertEquals("pre", result);

		//闭合标签
		str = "pre<img src=\"xxx/dfdsfds/test.jpg\" />";
		result = HtmlUtil.unwrapHtmlTag(str, "img");
		assertEquals("pre", result);

		//闭合标签
		str = "pre<img />";
		result = HtmlUtil.unwrapHtmlTag(str, "img");
		assertEquals("pre", result);

		//闭合标签
		str = "pre<img/>";
		result = HtmlUtil.unwrapHtmlTag(str, "img");
		assertEquals("pre", result);

		//包含内容标签
		str = "pre<div class=\"test_div\">abc</div>";
		result = HtmlUtil.unwrapHtmlTag(str, "div");
		assertEquals("preabc", result);

		//带换行
		str = "pre<div class=\"test_div\">\r\n\t\tabc\r\n</div>";
		result = HtmlUtil.unwrapHtmlTag(str, "div");
		assertEquals("pre\r\n\t\tabc\r\n", result);
	}