Golang基础-Time

常用函数

t, err := time.Parse(layout,date) // time.Time, error

t := time.Date(1995,time.September,22,13,0,0,0,time.UTC)
formatedTime := t.Format("Mon, 01/02/2006, 15:04") // string

Layout Options

Time	Options
Year	2006; 06
Month	Jan; January; 01; 1
Day	02; 2; _2(For preceding 0)
Weekday	Mon; Monday
Hour	15 ( 24 hour time format ); 3; 03 (AM or PM)
Minute	04; 4
Second	05; 5
AM/PM Mark	PM
Day of Year	002; __2

• format constants

const (
	Layout      = "01/02 03:04:05PM '06 -0700" // The reference time, in numerical order.
	ANSIC       = "Mon Jan _2 15:04:05 2006"
	UnixDate    = "Mon Jan _2 15:04:05 MST 2006"
	RubyDate    = "Mon Jan 02 15:04:05 -0700 2006"
	RFC822      = "02 Jan 06 15:04 MST"
	RFC822Z     = "02 Jan 06 15:04 -0700" // RFC822 with numeric zone
	RFC850      = "Monday, 02-Jan-06 15:04:05 MST"
	RFC1123     = "Mon, 02 Jan 2006 15:04:05 MST"
	RFC1123Z    = "Mon, 02 Jan 2006 15:04:05 -0700" // RFC1123 with numeric zone
	RFC3339     = "2006-01-02T15:04:05Z07:00"
	RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00"
	Kitchen     = "3:04PM"
	// Handy time stamps.
	Stamp      = "Jan _2 15:04:05"
	StampMilli = "Jan _2 15:04:05.000"
	StampMicro = "Jan _2 15:04:05.000000"
	StampNano  = "Jan _2 15:04:05.000000000"
	DateTime   = "2006-01-02 15:04:05"
	DateOnly   = "2006-01-02"
	TimeOnly   = "15:04:05"
)

Exercise

package booking

import (
	"fmt"
	"time"
)

// Schedule returns a time.Time from a string containing a date.
func Schedule(date string) time.Time {
	layout := "1/2/2006 15:04:05"
	t, _ := time.Parse(layout, date)
	return t
}

// HasPassed returns whether a date has passed.
func HasPassed(date string) bool {
	layout := "January 2, 2006 15:04:05"
	t, _ := time.Parse(layout, date)
	return time.Now().After(t)
}

// IsAfternoonAppointment returns whether a time is in the afternoon.
func IsAfternoonAppointment(date string) bool {
	layout := "Monday, January 2, 2006 15:04:05"
	t, _ := time.Parse(layout, date)
	if t.Hour() >= 12 && t.Hour() <= 18 {
		return true
	} else {
		return false
	}

}

// Description returns a formatted string of the appointment time.
func Description(date string) string {
	t := Schedule(date)
	return fmt.Sprintf("You have an appointment on %s, %s.",
		t.Weekday(),
		t.Format("January 2, 2006, at 15:04"))
}

// AnniversaryDate returns a Time with this year's anniversary.
func AnniversaryDate() time.Time {
	return time.Date(time.Now().Year(), 9, 15, 0, 0, 0, 0, time.UTC)
}