public static List<String> pick(String content ,String regex){
        Pattern tagSrc = Pattern.compile(regex);
        Matcher matcher = tagSrc
                .matcher(content);
        StringBuffer tagSb = new StringBuffer();
        List<String> retList = new ArrayList<String>();
        while (matcher.find()) {
            retList.add(matcher.group());
        }
        return retList;
    }