Home > Backend Development > Golang > Use of time processing library in Go language

Use of time processing library in Go language

WBOY
Release: 2023-06-03 12:10:33
Original
701 people have browsed it

In software development, processing time is a recurring issue. Especially in large systems, time is an essential part of recording events, scheduling tasks, and analyzing data. Therefore, using a suitable time processing library becomes a very important task. This article will introduce the use of time processing library time in Go language.

Representation of time

In the Go language, we can use the time.Time type to represent time. A value of type Time contains year, month, day, hour, minute, second, nanosecond and time zone information. This type is built-in so we don't need to install any additional libraries to use it.

Get the current time

The method to get the current local time is to use the time.Now() function. It will return a time object of type time.Time, which represents the current time when the program is running.

func main() {
    current_time := time.Now()
    fmt.Println(current_time)
}
Copy after login

Output results:

2021-05-17 16:34:22.7241986 +0800 CST m=+0.000731901
Copy after login

Time formatting

It is a very common requirement to display time in different formats. In the Go language, we can use the time.Format() function to format time. This function receives a format string and converts the time object into the corresponding string according to this format.

func main() {
    current_time := time.Now()
    formatted_time := current_time.Format("2006-01-02 15:04:05")
    fmt.Println(formatted_time)
}
Copy after login

Output result:

2021-05-17 16:34:22
Copy after login

In the format string, several commonly used placeholders are as follows:

# to the left. is fixed as a 2-digit date. If there are less than 2 digits, add 0 Fixed to 2 digits of hour, 24-hour system, if there are less than two digits, add 0 on the left side Fixed to 2 For minutes with 2 digits, add 0 to the left if there are less than two digits.##Time operation
Placeholder The symbol means
2006 is fixed to a 4-digit year, indicating a Standard
01 is fixed to a 2-digit month. If there are less than 2 digits, add 0
##02
15
04
05

The time processing library of Go language also provides some time operation methods.

Increase or decrease the duration

time.Add()

The method allows us to add or reduce a period of time:<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:go;toolbar:false;'>func main() { current_time := time.Now() after_one_hour := current_time.Add(time.Hour) fmt.Println(after_one_hour) }</pre><div class="contentsignin">Copy after login</div></div>Output result:

2021-05-17 17:34:22.6523704 +0800 CST m=+3601.928903701
Copy after login

In this example, we use

time.Hour

to represent the length of one hour, and then use the Add() method to add the current time to this length of time. The return value of this method is a time object, which represents the time point one hour after the current time. We can also use the

time.Sub()

method to calculate the time difference between two times: <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:go;toolbar:false;'>func main() { start_time := time.Now() end_time := time.Now().Add(time.Hour) duration := end_time.Sub(start_time) fmt.Println(duration) }</pre><div class="contentsignin">Copy after login</div></div>Output result:

1h0m0s
Copy after login

here The calculation result is a value of type

time.Duration

, which represents the length of time between two time points. Set time

time.Date()

method allows us to create a time object based on the specified year, month, day, hour, minute, second and time zone: <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:go;toolbar:false;'>func main() { t := time.Date(2021, 5, 17, 15, 30, 0, 0, time.Local) fmt.Println(t) }</pre><div class="contentsignin">Copy after login</div></div>Output result:

2021-05-17 15:30:00 +0800 CST
Copy after login

Get time information

Time

type provides some methods to get time information, such as year, month, day , hours, minutes, seconds, etc. The following are some commonly used methods: <div class="code" style="position:relative; padding:0px; margin:0px;"><pre class='brush:go;toolbar:false;'>func main() { current_time := time.Now() fmt.Println(current_time.Year()) // 获取年份 fmt.Println(current_time.Month()) // 获取月份 fmt.Println(current_time.Day()) // 获取日期 fmt.Println(current_time.Hour()) // 获取小时数 fmt.Println(current_time.Minute()) // 获取分钟数 fmt.Println(current_time.Second()) // 获取秒数 fmt.Println(current_time.Weekday()) // 获取星期几,0表示星期日 }</pre><div class="contentsignin">Copy after login</div></div>Output results:

2021
May
17
16
34
22
Monday
Copy after login

Reference documentation

[Go language official documentation](https://golang.org/ pkg/time/)
  • [Usage of Golang time and date](https://www.runoob.com/w3cnote/go-datetime.html)

The above is the detailed content of Use of time processing library in Go language. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template