代号One-RegexConstraint检查有效的电话号码 [英] Codename One - RegexConstraint to check a valid phone number

问题描述

在以下代码中，RegexConstraint不起作用，因为电话号码结果始终不正确。怎么了？我需要检查手机号码（无国家代码）。例如，输入3652312453应该是正确的，但是在以下代码中它被评估为不正确。
我从评论中链接的讨论中复制了正则表达式：我唯一的要求是有效的电话号码。

In the following code, the RegexConstraint doesn't work, because the phone number results always incorrect. What's wrong? I need to check a mobile phone number (without the country code). For example, the input 3652312453 should be correct, but in the following code it's evaluated as incorrect. I copied the regex from the discussion linked in the comment: my only requirement is a valid phone number.

（注意：此问题不是适用于通用Java，但仅适用于代号One。类 CountryCodePicker扩展了类 Button：我报告说是为了清楚地表明电话号码和国家/地区代码是分开的）

    TextModeLayout tl = new TextModeLayout(1, 1);
    Container loginContainer = new Container(tl);
    TextComponent phone = new TextComponent().label("PHONE").errorMessage("INVALID-PHONE");
    CountryCodePicker countryCode = new CountryCodePicker();
    phone.getField().setConstraint(TextArea.PHONENUMBER);
    loginContainer.add(phone);
    Container loginContainerWithCodePicker = new Container(new BoxLayout(BoxLayout.X_AXIS_NO_GROW));
    loginContainerWithCodePicker.add(countryCode).add(loginContainer);
    // https://stackoverflow.com/questions/8634139/phone-validation-regex
    String phoneRegEx = "/\\(?([0-9]{3})\\)?([ .-]?)([0-9]{3})\\2([0-9]{4})/";
    val.addConstraint(phone, new RegexConstraint(phoneRegEx, "NOT-VALID-NUMBER"));
    Button loginButton = new Button("LOG-IN");
    val.addSubmitButtons(loginButton);

推荐答案

[rant]
我个人真的很讨厌正则表达式，除了琐碎的验证之外，我发现它根本无法读取。
[/ rant]

[rant] Personally I really hate regex as I find it damn unreadable for anything other than trivial validation. [/rant]

所以我更愿意这样做：

val.addConstraint(phone, new Constraint() {
   public  boolean isValid(Object value) {
       String v = (String)value;
       for(int i = 0 ; i < v.length() ; i++) {
          char c = v.charAt(i);
          if(c >= '0' && c <= '9' || c == '+' || c == '-') {
              continue;
          }
          return false;
       }
       return true;
   }

   public String getDefaultFailMessage() {
       return "Must be valid phone number";
   }
});

但是，我猜测正则表达式对您失败的原因与斜杠的语法有关：

However, I'm guessing the reason the regex failed for you is related to the syntax with the slashes:

String phoneRegEx = "^\\(?([0-9]{3})\\)?([ .-]?)([0-9]{3})\\2([0-9]{4})";

这篇关于代号One-RegexConstraint检查有效的电话号码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！