Home / Questions / 417
Accepted
Jordi Castilla
Asked: 2020-12-05 04:35:51 +0800 CST 2020-12-05 04:35:51 +0800 CST

Pattern matcher to format Spanish phone numbers

  • 772

I have a list for validated mobile numbers that I have to display in the same way:

The desired format is:+34 666 111 222

String telefonos = 
            "666444555,
             666-444-555,
             666 44 45 55,
             666-44-45-55,
             +34666555444,
             0034666555444";

Pattern pattern = Pattern.compile(""); // aqui es donde me clavo.
Matcher matcher = pattern.matcher(telefonos);

while (matcher.find())
    System.out.println(matcher.group());

Expected output:

+34 666 444 555
+34 666 444 555
+34 666 444 555
+34 666 444 555
+34 666 555 444
+34 666 555 444
java

2 Answers

  1. Best Answer

    Try the following regular expression:

    ^(0034|\+34)?(\d\d\d)-? ?(\d\d)-? ?(\d)-? ?(\d)-? ?(\d\d)$

    regex

    If you plan to use this expression frequently, it is recommended to use a constant to avoid recompiling the expression every time, ie:

    private static final Pattern REGEX_PATTERN = 
        Pattern.compile("^(0034|\\+34)?(\\d\\d\\d)-? ?(\\d\\d)-? ?(\\d)-? ?(\\d)-? ?(\\d\\d)$", Pattern.MULTILINE);

public static void main(String[] args) {
    String input = "666444555\n666-444-555\n666 44 45 55\n666-44-45-55\n+34666555444\n0034666555444";

    System.out.println(
        REGEX_PATTERN.matcher(input).replaceAll("+34 $2 $3$4 $5$6")
    );  
}

    Departure:

    +34 666 444 555
+34 666 444 555
+34 666 444 555
+34 666 444 555
+34 666 555 444
+34 666 555 444
    • 18

  2. The same as in the other question, I recommend you use libphonenumber( Google's library to validate phone numbers). It has many advantages compared to doing your own implementation, for example that you don't have to maintain it yourself and that it gives you the number in international format, no matter how the user enters it.

    An example of how it is used is:

    String number = "666444555"
PhoneNumberUtil phoneUtil = PhoneNumberUtil.getInstance();
try {
  PhoneNumber number = phoneUtil.parse(number, "ES");
} catch (NumberParseException e) {
  System.err.println("NumberParseException was thrown: " + e.toString());
}

    Now there are a number of methods but the most important would be:

    boolean isValid = phoneUtil.isValidNumber(number); // retorna true

    Here you will always be able to have the international format you want:

    System.out.println(phoneUtil.format(number, PhoneNumberFormat.INTERNATIONAL));

    Of course, I always recommend that you ask the question of whether or not the number is valid before asking about its international format.

    To see a demo you can go here .

    • 14