{ "machines": [{ "name": "relay_1", "totalmem": "3G", "machinemem": "6G" }, { "name": "relay_2", "totalmem": "30G", "machinemem": "4G" }]}嘗試使用下面的代碼進行解析Run: func(cmd *cobra.Command, args []string) { fmt.Println("relay called") conf, _ = rootCmd.Flags().GetString("conf") if conf != "" { fmt.Println("From Create Command : ", conf) } data, err := ioutil.ReadFile("file.txt") // data has type []byte if err != nil { log.Fatal(err) } var result []map[string]interface{} json.Unmarshal(data, &result) relays := result["relays"].(map[string]interface{}) for key, relay := range relays { fmt.Println("name :", relay["name"], "totalmem:", relay["totalmem"], "relaymem:", relay["relaymem"]) } },但我收到如下錯誤，表明該類型無效cmd/create_relay.go:54:29：無效類型斷言：結果["relays"].(map[string])（左側為非接口類型map[string]interface {}）有人可以讓我知道如何使用下面的接口解析下面的 json數組json字典去
2 回答
qq_花開花謝_0
TA貢獻1835條經驗 獲得超7個贊
它與下面的代碼一起工作。
type Relays struct {
Relays []Relay `json:"relays"`
}
type Relay struct {
Name string `json:"name"`
Totalmem string `json:"totalmem"`
Relaymem string `json:"relaymem"`
}
// relayCmd represents the relay command
var createrelayCmd = &cobra.Command{
Use: "relay",
Short: "A brief description of your command",
Long: `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:
Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
Run: func(cmd *cobra.Command, args []string) {
fmt.Println("relay called")
conf, _ = rootCmd.Flags().GetString("conf")
if conf != "" {
fmt.Println("From Create Command : ", conf)
jsonFile, err := os.Open(conf)
// if we os.Open returns an error then handle it
if err != nil {
fmt.Println(err)
}
fmt.Println("Successfully Opened users.json")
// defer the closing of our jsonFile so that we can parse it later on
defer jsonFile.Close()
data, err := ioutil.ReadAll(jsonFile) // data has type []byte
if err != nil {
log.Fatal(err)
}
var relays Relays
json.Unmarshal(data,&relays)
for i := 0; i < len(relays.Relays); i++ {
fmt.Println("User Name: " + relays.Relays[i].Name)
fmt.Println("User Totalmem: " + relays.Relays[i].Totalmem)
fmt.Println("User Relaymem: " + relays.Relays[i].Relaymem)
}
}
},
}
幕布斯7119047
TA貢獻1794條經驗 獲得超8個贊
result在您的代碼中是一個地圖數組，您正在使用result["relays"]它是無效的。
你的代碼應該是這樣的：
Run: func(cmd *cobra.Command, args []string) {
fmt.Println("relay called")
conf, _ = rootCmd.Flags().GetString("conf")
if conf != "" {
fmt.Println("From Create Command : ", conf)
}
data, err := ioutil.ReadFile("file.txt") // data has type []byte
if err != nil {
log.Fatal(err)
}
var result map[string]interface{}
json.Unmarshal(data, &result)
relays := result["relays"].([]interface{})
for _, relay := range relays {
relayM := relay.(map[string]interface{})
fmt.Println("name :", relayM["name"].(string),
"totalmem:", relayM["totalmem"].(string),
"relaymem:", relayM["relaymem"].(string))
}
},
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