我一直在嘗試通過解組我的 json 文件來提取一些 JSON，但是，我不知道為什么它沒有發(fā)生。我能夠使用viper.AllSettings()但不能通過解組來獲取數(shù)據(jù)。我認(rèn)為我犯了一個(gè)愚蠢的錯(cuò)誤，請(qǐng)分享您的想法。github鏈接是-https: //github.com/parthw/100-days-of-code/tree/main/golang/d6-cobra-viper-continued，代碼如下。main.gopackage mainimport (    "fmt"    "example.com/cobra-viper/cmd"    "github.com/spf13/viper")// Myconfig exampletype Myconfig struct {    username string `mapstructure:"username"`}func main() {    cmd.Execute()    fmt.Println("I can print this ", viper.AllSettings())    var mc Myconfig    if err := viper.Unmarshal(&mc); err != nil {        fmt.Println(err)    }    fmt.Println(mc)}在 cmd 目錄中使用 cobra CLI 生成的代碼：package cmdimport (    "fmt"    "os"    "github.com/spf13/cobra"    homedir "github.com/mitchellh/go-homedir"    "github.com/spf13/viper")var (    cfgFile string    author  string)// Myconfig exampletype Myconfig struct {    username string}// rootCmd represents the base command when called without any subcommandsvar rootCmd = &cobra.Command{    Use:   "cobra-viper",    Short: "A brief description of your application",    Long: `A longer description that spans multiple lines and likely containsexamples and usage of using your application. For example:Cobra is a CLI library for Go that empowers applications.This application is a tool to generate the needed filesto quickly create a Cobra application.`,    // Uncomment the following line if your bare application    // has an action associated with it:    Run: func(cmd *cobra.Command, args []string) {        fmt.Println("Welcome to rootcmd")        var mc Myconfig        if err := viper.Unmarshal(&mc); err != nil {            fmt.Println(err)        }        fmt.Println(mc)        fmt.Println("I can print this ", viper.AllSettings())    },}