How to match IP address with regular expression in Go?
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])$Go 代码示例:使用 regexp.MatchString() 函数进行匹配。实战案例:使用 regexp.MustCompile() 函数从字符串中替换所有 IP 地址。
如何在 Go 中用正则表达式匹配 IP 地址?
正则表达式是一种强大的工具,可用于在字符串中搜索和匹配模式。在 Go 中,我们可以使用 regexp
包轻松地使用正则表达式。
正则表达式语法
匹配 IP 地址的正则表达式语法如下:
^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$
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") } }
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) }
输出:
The IP address of the web server is <REDACTED>. The database server has the IP address <REDACTED>.
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