golang 域名 转 ip

示例如下：

package main
 
import (
	"fmt"
	"net"
	"os"
)
 
func main() {
	if len(os.Args) != 2 {
		fmt.Fprintf(os.Stderr,"Usage: %s hostname\n",os.Args[0])
		fmt.Println("Usage: ",os.Args[0],"hostname")
		os.Exit(1)
	}
	name := os.Args[1]
 
	addr,err := net.ResolveIPAddr("ip",name)
	if err != nil {
		fmt.Println("Resolution error",err.Error())
		os.Exit(1)
	}
	fmt.Println("Resolved address is ",addr.String())
	os.Exit(0)
}

测试百度的ip ：go run ip.go baidu.com

结果如下：Resolved address is  39.156.69.79