How to use regular expressions to verify the area code of the ID card number in golang

In the national standard GB 2260, the area code of the ID card number specifies the area where the ID card number is issued. In golang, we can use regular expressions to verify whether the area code of the ID number complies with the specification. This article will introduce how to use regular expressions in golang to verify the area code of the ID card number.

1. GB 2260 standard

GB 2260 is a Chinese national standard that regulates the classification, numbering, name and code of administrative divisions. Among them, the regulations for the area code of the ID card number are as follows:

• The first two digits represent the province code
• The middle two digits represent the city, region or autonomous prefecture division code
• The last digit is the check code, which is currently a digit or letter code specifications.

2. Regular expressions in golang

In golang, to use regular expressions, you need to import the regular expression library regexp, and you can use regular regular expression syntax for matching and replacement. , extraction and other operations.

3. Use golang to verify the area code of the ID number

According to the GB 2260 standard, we can derive the rules for the area code of the ID number:

^1-9 {5}$

Among them, ^ represents the beginning of the string, $ represents the end of the string; [1-9] represents the first digit that cannot be 0, [0-9]{5} represents the following five The digit can be any number from 0-9.

We can use the regexp library in golang to write a function to verify the ID number area code:

import (
    "regexp"
)

func CheckIDAreaCode(code string) bool {
    reg := regexp.MustCompile("^[1-9][0-9]{5}$")
    return reg.MatchString(code)
}

In the above code, we first use regexp.MustCompile() to compile the regular expression , and then use the MatchString() method to determine whether the incoming string conforms to the rules of the regular expression. Returns true if the match is successful, false otherwise.

4. Usage Example

Next, we can use an example to check the correctness of the above function:

fmt.Println(CheckIDAreaCode("110101")) // true
fmt.Println(CheckIDAreaCode("011010")) // false
fmt.Println(CheckIDAreaCode("1101")) // false
fmt.Println(CheckIDAreaCode("110101K")) // false

In the above code, we passed in the For strings that do not comply with the rules, you can see that the output results correspond to true and false respectively.

5. Summary

Through the method introduced in this article, we can quickly and accurately verify whether the ID number area code complies with the rules in golang. In actual development, we can write a general regular expression verification function according to the above method to facilitate code reuse and maintenance.

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