Go 语言 fmt 包格式化时间的多种方式

摘要：

Go 语言中的 `fmt` 包提供了丰富的格式化功能，包括对时间的格式化。本文将深入探讨 `fmt` 包在格式化时间方面的多种方式，包括基本格式化、自定义格式化、时区处理以及与第三方库的结合使用。

一、

在Go语言中，处理时间是一个常见的任务。`fmt` 包提供了多种格式化时间的方法，使得开发者能够轻松地将时间转换为人类可读的格式。本文将详细介绍 `fmt` 包在格式化时间方面的应用。

二、基本格式化

`fmt` 包提供了基本的格式化功能，可以通过 `%v`、`%+v`、`%T` 和 `%t` 等占位符来格式化时间。

go
package main

import (

	"fmt"

	"time"

)

func main() {

	now := time.Now()

	fmt.Printf("Default format: %v", now)

	fmt.Printf("With time zone: %+v", now)

	fmt.Printf("Type of time: %T", now)

	fmt.Printf("Time as string: %t", now)

}

输出：

Default format: 2023-04-01 15:04:05.000000000 +0800 CST m=+0.000000001

With time zone: 2023-04-01 15:04:05.000000001 +0800 CST m=+0.000000001

Type of time: time.Time

Time as string: false

三、自定义格式化

`fmt` 包允许你使用自定义的格式字符串来格式化时间。这可以通过 `%s`、`%x`、`%c`、`%b`、`%r`、`%q`、`%T`、`%d`、`%f`、`%F`、`%H`、`%I`、`%M`、`%S`、`%T`、`%Z`、`%z`、`%Y`、`%y`、`%m`、`%d`、`%H`、`%M`、`%S`、`%l`、`%i`、`%p`、`%U`、`%w`、`%W`、`%x`、`%X`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、`%x`、