取出 字符串中的 网址

    public static void main(String[] args) {        String url = "小人书123网 dddddhttp://www.xiaorenshu123.com/entry/4545/0/?a=3张国";        // url = "abc";        getUrl(url);    }    public static String getUrl(String input) {        String regex = "(http://.*?)[\\s\u4e00-\u9fa5]";        Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);        Matcher matcher = pattern.matcher(input);        if (matcher.find()) {            System.out.println(matcher.group(1));            return matcher.group(1);        }        return "";    }