go 变量与json相互转换

secToSrtTime := func(start, end float64) string {
    startI := int64(start * 1e9)
    endI := int64(end * 1e9)
    // 00:00:00.000
    stdTime := func(t time.Duration) string {
      return fmt.Sprintf("%02d:%02d:%02.3f", int(t.Hours()), int(t.Minutes()), t.Seconds())
    }
    // 不要加换行
    return stdTime(time.Duration(startI)) + " --> " + stdTime(time.Duration(endI)) + " line:0% "
  }

package main
import (
    "encoding/json"
    "fmt"
    "reflect"
)
// 结构体 中的 数据 一定要 开头大写`json:"year" `
type mydata struct {
    Year1  string
    Month1 string `json:"month"`
    Day1   string `json:"day"`
}
func main3() {
    mydata_1 := []mydata{{"1", "2", "3"}, {"2", "4", "6"}}
    json_mydata, resinfo1 := json.Marshal(mydata_1)
    fmt.Println(string(json_mydata), resinfo1)

    json_byt1 := []byte(`{"num":613,"strs":["a","b"]}`)
    var loud_json1 map[string]interface{}
    _ = json.Unmarshal(json_byt1, &loud_json1)
    num1 := loud_json1["num"]
    fmt.Println(num1)
    fmt.Println(reflect.TypeOf(num1))
}