[Go - Basic] Time相关

import "time"

类型

type Time struct {
    wall uint64
    ext  int64
    loc *Location
}

type Month int

type Weekday int

type Duration int64

常用函数和方法

函数：
Now() Time   当前Time
Date(year int, month Month, day, hour, min, sec, nsec int, loc *Location) Time //返回一个设置的time类型
Since(t Time) Duration //time.Now().Sub(t) 
Unix(sec int64, nsec int64) Time // 时间戳转时间 1sec = 1nsec * 1e6 , sec 10位时间戳

方法：
(t Time) Add(d Duration) Time // returns the time t+d.
(t Time) AddDate(years int, months int, days int) Time
(t Time) Sub(u Time) Duration   //计算时间差
(t Time) Unix() int64  10位时间戳
(t Time) UnixNano() int64 16位时间戳
(t Time) Equal(u Time) bool // 比较两个time相等
(t Time) After(u Time) bool // reports whether the time instant t is after u.
(t Time) Before(u Time) bool // reports whether the time instant t is before u.
(t Time) IsZero() bool  // reports whether t represents the zero time instant, January 1, year 1, 00:00:00 UTC.
(t Time) UTC() Time // returns t with the location set to UTC.
(t Time) Local() Time // returns t with the location set to local time.
(t Time) In(loc *Location) Time //设置为指定location
(t Time) Location() *Location // returns the time zone information associated with t.
(t Time) Zone() (name string, offset int) // name of the zone (such as "CET") and its offset in seconds east of UTC.

time和string转换

time -> string
(t Time) Format(layout string) string // layout :("2006-01-02 15:04:05")

string -> time
Parse(layout, value string) (Time, error) // layout

获取当天零点时间戳

    timeStr := time.Now().Format("2006-01-02")  
    fmt.Println("timeStr:", timeStr)  
    t, _ := time.Parse("2006-01-02", timeStr)  
    timeNumber := t.Unix()  
    fmt.Println("timeNumber:", timeNumber)

获取本周周一零点时间戳（以周一为起始周）

timeNow := time.Now()
    day := timeNow.Format("2006-01-02 15:04:05")
    offset := int(timeNow.Weekday() - time.Weekday(1))
    if offset == -1 {
        offset = 6
    }
timeNowZeroStr := timeNow.Format("2006-01-02")
t, _ := time.Parse("2006-01-02", timeNowZeroStr)
thisMonday := t.AddDate(0, 0, -offset).Unix()