java代码如何从一个a标签中提取超链接呢?

a标签中提取url的实现思路:
 //从一个字符串中提取url    
 public static list<String> extractUrls(String text) {
	List<String> containedUrls = new ArrayList<String>();
	String urlRegex = "((https?|ftp|gopher|telnet|file):((//)|(\\\\))+[\\w\\d:#@%/;$()~_?\\+-=\\\\\\.&]*)";
	Pattern pattern = Pattern.compile(urlRegex, Pattern.CASE_INSENSITIVE);
	Matcher urlMatcher = pattern.matcher(text);

	while (urlMatcher.find()) {
		containedUrls.add(text.substring(urlMatcher.start(0), urlMatcher.end(0)));
	}


	return containedUrls;
}

//提取a标签中的内容
public static List<String> extractTitle(String text) {
	List<String> containedUrls = new ArrayList<String>();
	String urlRegex = ">(.*?)<";
	Pattern pattern = Pattern.compile(urlRegex, Pattern.CASE_INSENSITIVE);
	Matcher urlMatcher = pattern.matcher(text);

	while (urlMatcher.find()) {
		containedUrls.add(text.substring(urlMatcher.start(0), urlMatcher.end(0)).replace(">", "").replace("<", ""));
	}

	return containedUrls;
}