Eli's Blog

1. 命令行参数：os.Args []string

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func main() {
	args := os.Args

	fmt.Printf("接收到%v个参数\n", len(args))

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

2. flag包解析命令行参数

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IntVar(p *int, name string, value int, usage string)
StringVar(p *string, name string, value string, usage string)
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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, "p", "", "密码，默认为空")
	flag.StringVar(&host, "h", "", "主机名，localhost")
	flag.IntVar(&port, "P", 3306, "端口，默认3306")

	// 转换
	flag.Parse()

	fmt.Printf("user=%v, pwd=%v, host=%v, port=%v\n", user, pwd, host, port)
}
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$ go build -o main flag_1.go 
$ ./main -u root -p 123456 -h localhost -P 3006
user=root, pwd=123456, host=localhost, port=3006

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