How to validate email address in Golang using regular expression?
要使用正则表达式在 Golang 中验证电子邮件地址,请执行以下步骤:使用 regexp.MustCompile 创建一个正则表达式模式,匹配有效的电子邮件地址格式。使用 MatchString 函数检查字符串是否与模式匹配。该模式涵盖了大多数有效的电子邮件地址格式,包括:局部用户名可以包含字母、数字和特殊字符:!.#$%&'*+/=?^_{|}~-`域名至少包含一个字母,后面可以跟字母、数字或连字符顶级域名(TLD)不能超过 63 个字符长
如何使用正则表达式在 Golang 中验证电子邮件地址
正则表达式是一种用于匹配字符串模式的强大工具。在 Golang 中,我们可以使用 regexp
包提供的 MustCompile
函数来创建正则表达式,并使用 MatchString
函数来检查字符串是否与模式匹配。
要验证电子邮件地址,我们可以使用以下正则表达式模式:
emailRegex := regexp.MustCompile("^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$")
这个模式涵盖了大多数有效的电子邮件地址格式,包括:
- 局部用户名可以包含字母、数字和以下特殊字符:
!.#$%&'*+/=?^_
{|}~-` - 域名至少包含一个字母,后面可以跟字母、数字或连字符
- 顶级域名(TLD)不能超过 63 个字符长
实战案例
package main import ( "fmt" "regexp" ) func main() { // 创建正则表达式 emailRegex := regexp.MustCompile("^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$") // 检查一些电子邮件地址 addresses := []string{"john@example.com", "mary@example.net", "bob@example.org", "invalid@example"} for _, address := range addresses { if emailRegex.MatchString(address) { fmt.Printf("%s 是一个有效的电子邮件地址\n", address) } else { fmt.Printf("%s 不是一个有效的电子邮件地址\n", address) } } }
运行此程序将输出:
john@example.com 是一个有效的电子邮件地址 mary@example.net 是一个有效的电子邮件地址 bob@example.org 是一个有效的电子邮件地址 invalid@example 不是一个有效的电子邮件地址
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