golang获取本地ipv4地址

再一次项目中，需要获取本地的ip地址，code:

package main

import (
    "fmt"
    "net"
)

func LocalIp() string {
    addrs, err := net.InterfaceAddrs()
    if err != nil {
        fmt.Println(err)
    }
    var ip string = "localhost"
    for _, address := range addrs {
        if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
            if ipnet.IP.To4() != nil {
                ip = ipnet.IP.String()
            }
        }
    }
    return ip
}

func main()  {
    fmt.Println(LocalIp())
}