在文本中检测IBAN

Question

有一个简单的regex模式可以检测文本中的IBAN (包括特定的国家格式?)

实际上，我正在用这个正则表达式找到IBAN：

[a-zA-Z]{2}[0-9]{2}[0-9a-zA-Z]{10,30}

但这与格式化的IBAN类似(正常，我没有引入白空间检测)不匹配：

FR76 30003 02420 002202XXXXX 77

或

PT50 0002 0123 1234 5678 9015 4

你能帮我吗？我在哪里可以找到所有按国家格式的IBAN模式？

例子：

“我的IBAN是PT50 0002 0123 1234 5678 9015 1，用正则表达式捕捉它，这个PT50000201231234567890151也是!”

我想提取/处理"PT50 0002 0123 1234 5678 9015 1“和"PT50000201231234567890151”。

编辑：解决方案1-非常长的模式：

((NO)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{3}|(NO)[0-9A-Z]{13}|(BE)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}|(BE)[0-9A-Z]{14}|(DK|FO|FI|GL|NL)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{2}|(DK|FO|FI|GL|NL)[0-9A-Z]{16}|(MK|SI)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{3}|(MK|SI)[0-9A-Z]{17}|(BA|EE|KZ|LT|LU|AT)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}|(BA|EE|KZ|LT|LU|AT)[0-9A-Z]{18}|(HR|LI|LV|CH)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{1}|(HR|LI|LV|CH)[0-9A-Z]{19}|(BG|DE|IE|ME|RS|GB)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{2}|(BG|DE|IE|ME|RS|GB)[0-9A-Z]{20}|(GI|IL)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{3}|(GI|IL)[0-9A-Z]{21}|(AD|CZ|SA|RO|SK|ES|SE|TN)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}|(AD|CZ|SA|RO|SK|ES|SE|TN)[0-9A-Z]{22}|(PT)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{1}|(PT)[0-9A-Z]{23}|(IS|TR)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{2}|(IS|TR)[0-9A-Z]{24}|(FR|GR|IT|MC|SM)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{3}|(FR|GR|IT|MC|SM)[0-9A-Z]{25}|(AL|CY|HU|LB|PL)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}|(AL|CY|HU|LB|PL)[0-9A-Z]{26}|(MU)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{2}|(MU)[0-9A-Z]{28}|(MT)[0-9A-Z]{2}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{4}[ ][0-9A-Z]{3}|(MT)[0-9A-Z]{29})

也不适用于法国的特定模式。

Answer 1

使用的Regex对有效的IBANs是不正确的。用这个Regex代替

 [a-zA-Z]{2}[0-9]{2}[a-zA-Z0-9]{4}[0-9]{7}([a-zA-Z0-9]?){0,16}

​

​

​

​

来源：http://snipplr.com/view/15322/iban-regex-all-ibans/

有关IBAN格式的更多信息：

​

​

Number

编辑：

对于更复杂的验证器，请检查以下代码https://jsfiddle.net/kf332bhj/1/

若要处理空格，请检测国家并根据字符长度定义正则表达式。

查看SWIFT的最新IBAN标准

https://www.swift.com/standards

https://www.swift.com/standards/data-standards/iban

var CODE_LENGTHS = {
            AD: 24, AE: 23, AT: 20, AZ: 28, BA: 20, BE: 16, BG: 22, BH: 22, BR: 29,
            CH: 21, CR: 21, CY: 28, CZ: 24, DE: 22, DK: 18, DO: 28, EE: 20, ES: 24,
            FI: 18, FO: 18, FR: 27, GB: 22, GI: 23, GL: 18, GR: 27, GT: 28, HR: 21,
            HU: 28, IE: 22, IL: 23, IS: 26, IT: 27, JO: 30, KW: 30, KZ: 20, LB: 28,
            LI: 21, LT: 20, LU: 20, LV: 21, MC: 27, MD: 24, ME: 22, MK: 19, MR: 27,
            MT: 31, MU: 30, NL: 18, NO: 15, PK: 24, PL: 28, PS: 29, PT: 25, QA: 29,
            RO: 24, RS: 22, SA: 24, SE: 24, SI: 19, SK: 24, SM: 27, TN: 24, TR: 26
        };

编辑2:

要回答Ingo，请查看https://www.swift.com/standards/data-standards/iban中的IBAN注册表(PDF)

( a)挪威的最低BBAN为11

( b)对于IBANs，9-15只需为数字(0-9{7})。例如，KZ86 125K ZT50 0410 0100对哈萨克斯坦有效。

Answer 2

将解决方案分为两个步骤是合理的：

1. 在课文中找出嫌疑人；
2. 解析并(可选)验证每个嫌疑人。

以下是这种方法的实施情况。我们需要每个国家的IBAN长度清单。在我的例子中，国家列表非常有限，所以我在这里使用@Sully的答案中的一个。尽管越来越多的国家可能加入进来，但我们强烈建议获得最新的名单。

const CODE_LENGTHS = {
    AD: 24, AE: 23, AT: 20, AZ: 28, BA: 20, BE: 16, BG: 22, BH: 22, BR: 29,
    CH: 21, CR: 21, CY: 28, CZ: 24, DE: 22, DK: 18, DO: 28, EE: 20, ES: 24,
    FI: 18, FO: 18, FR: 27, GB: 22, GI: 23, GL: 18, GR: 27, GT: 28, HR: 21,
    HU: 28, IE: 22, IL: 23, IS: 26, IT: 27, JO: 30, KW: 30, KZ: 20, LB: 28,
    LI: 21, LT: 20, LU: 20, LV: 21, MC: 27, MD: 24, ME: 22, MK: 19, MR: 27,
    MT: 31, MU: 30, NL: 18, NO: 15, PK: 24, PL: 28, PS: 29, PT: 25, QA: 29,
    RO: 24, RS: 22, SA: 24, SE: 24, SI: 19, SK: 24, SM: 27, TN: 24, TR: 26
};

// We use a regexp to find the suspects.
// IBAN starts from a 2-character country code followed by the checksum.
// So 4 symbols + the country specific number.
// The longest IBAN in this case is 31 symbols
// so the IBAN 'tail' is 31 - 4 = 27 characters. 
const MAX_LENGTH = Math.max(...Object.values(CODE_LENGTHS)) - 4;

// Let's say we want to highlight all the IBANs in the text.
const HighlightIBAN = text => text.replace(
    // Here is the magic. We search 2 letters followed by 2 digits
    // and followed by 27 meaningful characters.
    // The group (?:\W*[a-z0-9]) allows to ignore spaces, dots,
    // dashes or whatever a user may put as number group separators.
    new RegExp('[a-z]{2}[0-9]{2}(?:\\W*[a-z0-9]){0,' + MAX_LENGTH + '}', 'ig'),
    suspect => {
        // Here we have our suspect.
        // Just need to check if the IBAN is a IBAN indeed.
        const country = suspect.substr(0, 2).toUpperCase();
        const length = CODE_LENGTHS[country];

        // If the first 2 letters isn't a country code (not in the list)
        // we ignore the string found by the regex
        if(!length) return suspect;

        // Now we check if the finding contains the exact number
        // of meaningful symbols and extract the IBAN
        // using the same approach to ignore formatting
        const checkRegexp = new RegExp('^((?:\\W*[a-z0-9]){' + length + '})(.*)$', 'i');
        const parts = checkRegexp.exec(suspect);

        // Nothing extracted. The suitable sequence of symbols not found.
        // So we ignore the suspect again.
        if(!parts) return suspect;
        const iban = parts[1];
        const tail = parts[2];

        // We have our IBAN here.
        // The 'tail' is the symbols which follow the IBAN.
        // As we always pick 31 characters the string found
        // will have several symbols which shouldn't be touched at the end.

        // The extracted IBAN can be validated here (e.g. checksum and stuff)
        // like @Sully suggested.
        // Then we do our job. E.g. we can highlight the IBAN found.
        // Just don't forget to put the 'tail' back.
        return `<span class="iban">${iban}</span>${tail}`;
    }
)

在这里可以找到示例用法：https://jsfiddle.net/qkwx5ja7/1