有 Json 标签但未导出

开始学习歌朗.

Json tag but not exported

How to make unexported fields become exported and then implement it using methods?

Here is the code:

package main

import (
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
)

type Time struct {
    time
}
type time struct {
    id                    string  `json:"$id"`
    currentDateTime       string  `json:"currentDateTime,string"`
    utcOffset             float64 `json:"utcOffset,string"`
    isDayLightSavingsTime bool    `json:"isDayLightSavingsTime,string"`
    dayOfTheWeek          string  `json:"dayOfTheWeek,string"`
    timeZoneName          string  `json:"timeZoneName,string"`
    currentFileTime       float64 `json:"currentFileTime,string"`
    ordinalDate           string  `json:"ordinalDate,string"`
    serviceResponse       string  `json:"serviceResponse,string"`
}

func (t *Time) GetTime() (Time, error) {
    result := Time{}

    return result, t.Timenow(result)
}
func (t *Time) Timenow(result interface{}) error {

    res, err := http.Get("http://worldclockapi.com/api/json/utc/now")
    if err != nil {
        fmt.Println("Cannot get Json", err)
    }

    body, err := ioutil.ReadAll(res.Body)
    if err != nil {
        fmt.Println("Cannot create Body", err)
    }

    defer res.Body.Close()

    var resultJson interface{}
    return json.Unmarshal(body, &resultJson)

}

func main() {

    var a Time
    t, err := a.GetTime()
    if err != nil {
        fmt.Println("Error ", err)
    }
    fmt.Println("Time:", t)
}

Please explain in details whats wrong with struct and how to get right response?