go flag包获取参数

package main
 
import (
    "flag"
    "fmt"
)
 
func main() {
    host := flag.String("host", "10.20.30.29", "请输入host地址")
    port := flag.Int("port", 8080, "请输入端口号")
    flag.Parse() // 解析参数
    fmt.Printf("%s:%d\n", *host, *port)
}