popo

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命令行参数

os包

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for i, v := range os.Args {
    fmt.Printf("args[%v]=%v\n", i, v)
}

flag包

flag包可以方便的解析命令行参数，而且参数顺序可以随意

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import (
    "fmt"
    "flag"
)

func main() {
    var user string
    var pwd string
    var host string
    var port int

    flag.StringVar(&user, "u", "", "用户名，默认为空")
    flag.StringVar(&pwd, "pwd", "", "密码，默认为空")
    flag.StringVar(&host, "h", "localhost", "主机名，默认为localhost")
    flag.IntVar(&port, "port", 3306, "端口号，默认为3306")

    flag.Prase()
    
    fmt.Printf("user=%v pwd=%v host=%v port=%v", user, pwd, host, port)
}