How to use regular expressions to verify the validity of ID number in golang

ID card number is a commonly used method of identification in our daily life, and in Golang language, it is very simple to use regular expressions to verify the validity of the ID number. In this article, we will introduce the steps and methods of using regular expressions to verify the validity of ID numbers.

First of all, we need to understand the structure of the ID number. The ID number is composed of 15 or 18 digits. The first 17 digits are the sequence code of the ID number, and the last digit is the ID number. Check code. The check code is the result of a weighted operation on the first 17 digits of the ID number. The specific formula is as follows:

∑(wi×ai)

where wi is the weighting factor, ai is the first 17 digits of the ID card, the weighted modulus is 11, the calculation result needs to be the remainder of 11, and finally the last digit of the ID card check code is obtained through the remainder and the correspondence table.

After understanding the structure of the ID number, we can use regular expressions in Golang to verify the validity of the ID number. The following are the steps to verify the validity of the ID number:

Step 1: Introduce the regular expression package

In the Golang language, you can use the "regexp" package to perform regular expression matching operations. Therefore, before using regular expressions to verify ID card numbers, you need to introduce the "regexp" package first. The code is as follows:

import "regexp"

Step 2: Write regular expressions

Write regular expressions that match ID numbers Expression is a critical step, and the regular expression can be obtained by analyzing the structure of the ID number. For a 15-digit ID number, we can use the following regular expression:

^[1-9]d{7}((0d)|(1[0-2]))(([0|1|2]d)|3[0-1])d{3}$

For an 18-digit ID number, we can use the following regular expression:

^[1-9]d{5}[1-9]d{3}((0d)|(1[0-2]))(([0|1|2]d)|3[0-1])d{3}[0-9Xx]$

The above regular expressions are all Matching is based on the structure of the ID number. The options in parentheses represent either the months starting with 0 from January to September, or the months starting with 1 from 0 to February.

Step 3: Use regular expressions to verify the ID number

After writing the regular expression matching the ID number, you can verify the identity through the "regexp.MatchString()" method The validity of the certificate number has been compromised. The code is as follows:

func checkIDCard(id string) bool {
    // 编写正则表达式
    const pattern = `^[1-9]d{5}[1-9]d{3}((0d)|(1[0-2]))(([0|1|2]d)|3[0-1])d{3}[0-9Xx]$`
    // 编译正则表达式
    regexp := regexp.MustCompile(pattern)
    // 匹配身份证号码
    return regexp.MatchString(id)
}

In the above code, the "checkIDCard()" function accepts a string parameter id, which is used to verify the validity of the ID number. In the function, the regular expression is first written and compiled into a regular expression object using the "regexp.MustCompile()" method. Finally, use the "regexp.MatchString()" method to match whether the ID number is valid. If it is valid, it returns true, otherwise it returns false.

To sum up, it is very simple to use regular expressions to verify the validity of the ID number. In the Golang language, you only need to introduce the "regexp" package, write a regular expression that matches the ID number, and use " Just use the regexp.MatchString()" method to match. Hope this article helps you!

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