String regex = "^((13[0-9])|(14[5,7,9])|(15([0-3]|[5-9]))|(17[0,1,3,5,6,7,8])|(18[0-9])|(19[8|9])|(16[6]))\\d{8}$";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher(registrant_phone); //registrant_phone ==== 電話號碼字段
boolean isMatch = m.matches();
if (!isMatch) {
msg.errorCode = 1;
msg.msg = "手機號格式不正確";
}else{
執行方法；
}