Table of Contents
如何在 Go 中用正则表达式匹配 IP 地址?
正则表达式语法
Go 代码示例
实战案例
Home Backend Development Golang How to match IP address with regular expression in Go?

How to match IP address with regular expression in Go?

May 31, 2024 pm 09:35 PM
regular expression IP address

如何在 Go 中使用正则表达式匹配 IP 地址?正则表达式语法:^(([0-9]|1-9|1[0-9]{2}|20-4|25[0-5]).){3}([0-9]|1-9|1[0-9]{2}|20-4|25[0-5])$Go 代码示例:使用 regexp.MatchString() 函数进行匹配。实战案例:使用 regexp.MustCompile() 函数从字符串中替换所有 IP 地址。

如何在 Go 中用正则表达式匹配 IP 地址?

如何在 Go 中用正则表达式匹配 IP 地址?

正则表达式是一种强大的工具,可用于在字符串中搜索和匹配模式。在 Go 中,我们可以使用 regexp 包轻松地使用正则表达式。

正则表达式语法

匹配 IP 地址的正则表达式语法如下:

^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$
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Go 代码示例

以下代码演示了如何使用 regexp 包匹配 IP 地址:

package main

import (
    "fmt"
    "regexp"
)

func main() {
    ipAddress := "192.168.1.1"
    
    matched, _ := regexp.MatchString(`^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$`, ipAddress)
    
    if matched {
        fmt.Println("IP address is valid")
    } else {
        fmt.Println("IP address is invalid")
    }
}
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实战案例

regexp 包还提供了其他有用的功能,例如替换和分组。以下代码演示了如何使用 regexp 包从字符串中替换所有 IP 地址:

package main

import (
    "fmt"
    "regexp"
)

func main() {
    text := "The IP address of the web server is 192.168.1.1. The database server has the IP address 10.0.0.1."
    
    // 匹配所有 IP 地址
    ips := regexp.MustCompile(`(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])(\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])){3}`)
    
    // 替换所有 IP 地址
    result := ips.ReplaceAllString(text, "<REDACTED>")
    
    fmt.Println(result)
}
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输出:

The IP address of the web server is <REDACTED>. The database server has the IP address <REDACTED>.
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