https://gitee.com/huangxiaohan1117/spider-flow/issues/I2M9CI

@Comment("url相对地址转绝对地址")
	@Example("${url.absolute('http://www.example.com/abc/index.html','./abs.html')}")
	@Return({String.class})
	public static String absolute(String baseUrl, String relativeUrl) {
		String result = null;
		try {
			URI baseUri = new URI(baseUrl);
			URI absoluteUri = baseUri.resolve(relativeUrl);
			// 屏蔽转URL,防止在baseUrl时无http(s)://的 protocol 导致的转换错误, 此时也可以处理 ws:// 等其他非http开头的地址
			/*URL absoluteUrl = absoluteUri.toURL();
			result = absoluteUrl.toString();*/

			result = absoluteUri.toString();
		} catch (Exception e) {
			//
		}
		return result;
	}