regex extract string.

regex.java

	public static String extractJsUrl(String originHtml) {
		// <script src="//s.ytimg.com/yts/jsbin/html5player-zh_CN-vflHa9pzi.js"
		// name="html5player"></script>
		final String REGEX = "//s[.]ytimg[.]com/.*html5player.*[.]js";
		Pattern p = Pattern.compile(REGEX);
		Matcher m = p.matcher(originHtml);

		String jsUrl = null;
		if (m.find()) {
			jsUrl = originHtml.substring(m.start(), m.end());
		} else {
			Logger.d("------- can not find jsUrl  ------");
			int index1 = originHtml.indexOf("name=\"html5player\"");
			if (index1 > 0) {
				String sub1 = originHtml.substring(index1 - 80, index1);
				int start = sub1.indexOf("src=\"//s.") + 5;
				int end = sub1.indexOf(".js") + 3;
				jsUrl = sub1.substring(start, end);
			}
		}
		jsUrl = "http:" + jsUrl;
		Logger.d("------- extractJsUrl ------" + jsUrl);
		return jsUrl;
	}