string 将 time.Time 转换为字符串
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StackOverFlow
Convert time.Time to string
提问by A.D
I'm trying to add some values from my database to a []stringin Go. Some of these are timestamps.
我正在尝试将我的数据库中的一些值添加到[]stringGo 中。其中一些是时间戳。
I get the error:
我收到错误：
cannot use U.Created_date (type time.Time) as type string in array element
不能使用 U.Created_date (type time.Time) 作为数组元素中的类型字符串
Can I convert time.Timeto string?
我可以转换time.Time为string吗？
type UsersSession struct {
Userid int
Timestamp time.Time
Created_date time.Time
}
type Users struct {
Name string
Email string
Country string
Created_date time.Time
Id int
Hash string
IP string
}
-
——
var usersArray = [][]string{}
rows, err := db.Query("SELECT u.id, u.hash, u.name, u.email, u.country, u.IP, u.created_date, us.timestamp, us.created_date FROM usersSession AS us LEFT JOIN users AS u ON u.id = us.userid WHERE us.timestamp + interval 30 minute >= now()")
U := Users{}
US := UsersSession{}
for rows.Next() {
err = rows.Scan(&U.Id, &U.Hash, &U.Name, &U.Email, &U.Country, &U.IP, &U.Created_date, &US.Timestamp, &US.Created_date)
checkErr(err)
userid_string := strconv.Itoa(U.Id)
user := []string{userid_string, U.Hash, U.Name, U.Email, U.Country, U.IP, U.Created_date, US.Timestamp, US.Created_date}
// -------------
// ^ this is where the error occurs
// cannot use U.Created_date (type time.Time) as type string in array element (for US.Created_date and US.Timestamp aswell)
// -------------
usersArray = append(usersArray, user)
log.Print("usersArray: ", usersArray)
}
EDIT
编辑
I added the following. It works now, thanks.
我添加了以下内容。现在可以用了，谢谢。
userCreatedDate := U.Created_date.Format("2006-01-02 15:04:05")
userSessionCreatedDate := US.Created_date.Format("2006-01-02 15:04:05")
userSessionTimestamp := US.Timestamp.Format("2006-01-02 15:04:05")
回答by icza
You can use the Time.String()method to convert a time.Timeto a string. This uses the format string "2006-01-02 15:04:05.999999999 -0700 MST".
您可以使用该Time.String()方法将 a 转换time.Time为 a string。这使用格式字符串"2006-01-02 15:04:05.999999999 -0700 MST"。
If you need other custom format, you can use Time.Format(). For example to get the timestamp in the format of yyyy-MM-dd HH:mm:ssuse the format string "2006-01-02 15:04:05".
如果您需要其他自定义格式，您可以使用Time.Format(). 例如，以yyyy-MM-dd HH:mm:ss使用格式字符串的格式获取时间戳"2006-01-02 15:04:05"。
Example:
例子：
t := time.Now()
fmt.Println(t.String())
fmt.Println(t.Format("2006-01-02 15:04:05"))
Output (try it on the Go Playground):
输出（在Go Playground上试试）：
2009-11-10 23:00:00 +0000 UTC
2009-11-10 23:00:00
Note: time on the Go Playground is always set to the value seen above. Run it locally to see current date/time.
注意：Go Playground 上的时间始终设置为上述值。在本地运行它以查看当前日期/时间。
Also note that using Time.Format(), as the layout stringyou always have to pass the same time –called the referencetime– formatted in a way you want the result to be formatted. This is documented at Time.Format():
另请注意，使用Time.Format(), 作为布局，string您始终必须传递相同的时间 - 称为参考时间 - 以您希望格式化结果的方式进行格式化。这是记录在Time.Format()：
Format returns a textual representation of the time value formatted according to layout, which defines the format by showing how the reference time, defined to be
Mon Jan 2 15:04:05 -0700 MST 2006would be displayed if it were the value; it serves as an example of the desired output. The same display rules will then be applied to the time value.
Format 返回根据布局格式化的时间值的文本表示，它通过显示如何定义参考时间来定义格式，定义为
Mon Jan 2 15:04:05 -0700 MST 2006如果是值就会显示；它用作所需输出的示例。然后将相同的显示规则应用于时间值。
回答by Hao
package main
import (
"fmt"
"time"
)
// @link https://golang.org/pkg/time/
func main() {
//caution : format string is `2006-01-02 15:04:05.000000000`
current := time.Now()
fmt.Println("origin : ", current.String())
// origin : 2016-09-02 15:53:07.159994437 +0800 CST
fmt.Println("mm-dd-yyyy : ", current.Format("01-02-2006"))
// mm-dd-yyyy : 09-02-2016
fmt.Println("yyyy-mm-dd : ", current.Format("2006-01-02"))
// yyyy-mm-dd : 2016-09-02
// separated by .
fmt.Println("yyyy.mm.dd : ", current.Format("2006.01.02"))
// yyyy.mm.dd : 2016.09.02
fmt.Println("yyyy-mm-dd HH:mm:ss : ", current.Format("2006-01-02 15:04:05"))
// yyyy-mm-dd HH:mm:ss : 2016-09-02 15:53:07
// StampMicro
fmt.Println("yyyy-mm-dd HH:mm:ss: ", current.Format("2006-01-02 15:04:05.000000"))
// yyyy-mm-dd HH:mm:ss: 2016-09-02 15:53:07.159994
//StampNano
fmt.Println("yyyy-mm-dd HH:mm:ss: ", current.Format("2006-01-02 15:04:05.000000000"))
// yyyy-mm-dd HH:mm:ss: 2016-09-02 15:53:07.159994437
}
回答by Vignesh Kumar
Please find the simple solution to convete Date & Time Format in Go Lang. Please find the example below.
请找到在 Go Lang 中讨论日期和时间格式的简单解决方案。请在下面找到示例。
Package Link: https://github.com/vigneshuvi/GoDateFormat.
包链接：https: //github.com/vigneshuvi/GoDateFormat。
Please find the plackholders:https://medium.com/@Martynas/formatting-date-and-time-in-golang-5816112bf098
请找到支持者：https://medium.com/@Martynas/formatting-date-and-time-in-golang-5816112bf098
package main
// Import Package
import (
"fmt"
"time"
"github.com/vigneshuvi/GoDateFormat"
)
func main() {
fmt.Println("Go Date Format(Today - 'yyyy-MM-dd HH:mm:ss Z'): ", GetToday(GoDateFormat.ConvertFormat("yyyy-MM-dd HH:mm:ss Z")))
fmt.Println("Go Date Format(Today - 'yyyy-MMM-dd'): ", GetToday(GoDateFormat.ConvertFormat("yyyy-MMM-dd")))
fmt.Println("Go Time Format(NOW - 'HH:MM:SS'): ", GetToday(GoDateFormat.ConvertFormat("HH:MM:SS")))
fmt.Println("Go Time Format(NOW - 'HH:MM:SS tt'): ", GetToday(GoDateFormat.ConvertFormat("HH:MM:SS tt")))
}
func GetToday(format string) (todayString string){
today := time.Now()
todayString = today.Format(format);
return
}
回答by firebitsbr
Go Playground http://play.golang.org/p/DN5Py5MxaB
去游乐场 http://play.golang.org/p/DN5Py5MxaB
package main
import (
"fmt"
"time"
)
func main() {
t := time.Now()
// The Time type implements the Stringer interface -- it
// has a String() method which gets called automatically by
// functions like Printf().
fmt.Printf("%s\n", t)
// See the Constants section for more formats
// http://golang.org/pkg/time/#Time.Format
formatedTime := t.Format(time.RFC1123)
fmt.Println(formatedTime)
}
