后端写校验方法

private void isHalfEnglish(String a1,String b1) {
  Pattern p = Pattern.compile("[A-Za-z0-9]+");
  Matcher aa = p.matcher(a1);
  Matcher bb = p.matcher(b1);
  if (aa.matches() == false || bb.matches() == false) {
  throw new BusinessException("error");
  }
}