java基于正则提取字符串中的数字功能【如提取短信中的验证码】

private void getPhoneNum(String smsBody) {
    Pattern pattern = Pattern.compile("(13|14|15|18)\\d{9}");
    Matcher matcher = pattern.matcher(smsBody);
    while (matcher.find()) {
      System.out.println(matcher.group());
    }
}

private String getYzmFromSms(String smsBody) {
    Pattern pattern = Pattern.compile("\\d{6}");
    Matcher matcher = pattern.matcher(smsBody);
    if (matcher.find()) {
      return matcher.group();
    }
    return null;
}