如何将Json中的日期转换为正常日期以检查它是否是高朗的闰年?

Question

我试图将json文件中的日期转换为我的。go脚本中的正常日期，我想检查它们是否为闰年，我已经做了这部分，但我想将其转换为日期，但我不知道如何，我试图使用strconvo . itoa (users.Users[I].Date)但它没有工作!

感谢任何反馈或帮助，谢谢!

当我试图同时添加两种类型的日期表单时收到的错误——>201/10/21 12:15:35解析时间"1982/01/08"如"2006-01-02":无法解析"/01/08"作为"产生绯闻。

BD.go

package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"os"
"time"
)
// Users struct which contains
// an array of users
type Users struct {
Users []User `json:"users"`
}
// User struct which contains a name
// a type and a list of social links
type User struct {
Firstname  string `json:"fname"`
Secondname string `json:"lname"`
Date       string `json:"date"`
}
func main() {
// Open our jsonFile
jsonFile, err := os.Open("users.json")
// 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()
// read our opened xmlFile as a byte array.
byteValue, _ := ioutil.ReadAll(jsonFile)
// we initialize our Users array
var users Users
// we unmarshal our byteArray which contains our
// jsonFile's content into 'users' which we defined above
json.Unmarshal(byteValue, &users)
// we iterate through every user within our users array and
// print out the user Type, their name, and their facebook url
// as just an example
// write a function to list out the people whose birthday is today.
// var yr int
for i := 0; i < len(users.Users); i++ {
date, err := time.Parse("2006/01/02", users.Users[i].Date)
if err != nil {
log.Fatal(err)
}
fmt.Println(date)
date1, err := time.Parse("2006-01-02", users.Users[i].Date)
if err != nil {
log.Fatal(err)
}
fmt.Println(date1)
// check if the date is a leap year, ex: 29 is not a leap year but 28th is !
if date.Day()%400 == 0 || (date.Day()%4 == 0 && date.Day()%100 != 0) {
fmt.Println("User First Name: " + users.Users[i].Firstname)
fmt.Println("User Second Name: " + users.Users[i].Secondname)
fmt.Println("User Date: " + users.Users[i].Date)
fmt.Println(users.Users[i].Date, " is a Leap Year ✨✨✨  ")
} else if date1.Day()%400 == 0 || (date1.Day()%4 == 0 && date1.Day()%100 != 0) {
fmt.Println("User First Name: " + users.Users[i].Firstname)
fmt.Println("User Second Name: " + users.Users[i].Secondname)
fmt.Println("User Date: " + users.Users[i].Date)
fmt.Println(users.Users[i].Date, " is a Leap Year ✨✨✨  ")
} else {
fmt.Println("User First Name: " + users.Users[i].Firstname)
fmt.Println("User Second Name: " + users.Users[i].Secondname)
fmt.Println("User Date: " + users.Users[i].Date)
fmt.Println(users.Users[i].Date, " is Not a Leap Year 💥💥💥 ")
}
}
}

。JSON文件

{
"users": [
{
"Fname": "Johnny",
"Lname":"mane",
"date":"1982/01/08"
},
{
"Fname": "Wayne",
"Lname":"Bruce",
"date":"1965/01/30"
},
{
"Fname": "Gaga",
"Lname":"Lady",
"date":"1986/03/28"
},
{
"Fname": "radio",
"Lname":"head",
"date":"1988/02/29"
},
{
"Fname": "Mario",
"Lname":"torres",
"date":"1996/09/28"
},

{
"Fname": "robert",
"Lname":"Alex",
"date":"1991/12/01"
},
{
"Fname": "Julia",
"Lname":"sevak",
"date":"1991-03-07" -->
},
{
"Fname": "feb",
"Lname":"robert",
"date":"1995-01-31".  ---> 
}


]
}

Answer 1

如果您将日期字段反编组为字符串，则需要使用与您的日期格式匹配的给定布局与time.Parse解析它，例如:

date, err := time.Parse("2006/01/02", users.Users[i].Date)

或者，你可以使用json.UnmarshalJSON直接反编组到time.Time字段，但是你需要一些额外的代码来支持你的自定义日期格式，如json反编组时间在RFC 3339格式中所描述的那样。

Answer 2

从github下载araddon timeparse库

https://github.com/araddon/dateparse.git

下面是一个使用这个神奇的包在golang中格式化日期的示例，而不用担心字符串date

t, err := dateparse.ParseAny("3/1/2014")

然后可以使用下面的函数对其进行格式化。

s:= t.Format("02 Jan 2006")

你可以试试上面的包，它仍然有一些极端的情况，但对大多数情况都有效。