golang获取当前时间是第几周-木庄网络博客

本文摘自php中文网，作者尚，侵删。

Go语言中使用import关键字导入包，包的名字使用双引号（""）包裹起来。

golang判断当前时间是第几周：

func main() {
 
    l, _ := time.LoadLocation("Asia/Shanghai")
    startTime,_ := time.ParseInLocation("2006-01-02", "2018-12-22", l)
    endTime,_ := time.ParseInLocation("2006-01-02", "2019-05-17", l)
 
    datas := GroupByWeekDate(startTime, endTime)
    for _, d := range datas {
        fmt.Println(d)
    }
 
}
 
//判断时间是当年的第几周
func WeekByDate(t time.Time) string {
    yearDay := t.YearDay()
    yearFirstDay := t.AddDate(0, 0, -yearDay+1)
    firstDayInWeek := int(yearFirstDay.Weekday())
 
    //今年第一周有几天
    firstWeekDays := 1
    if firstDayInWeek != 0 {
        firstWeekDays = 7 - firstDayInWeek + 1
    }
    var week int
    if yearDay <= firstWeekDays {
        week =  1
    } else {
        week = (yearDay-firstWeekDays)/7 + 2
    }
    return fmt.Sprintf("%d第%d周", t.Year(), week)
}
 
type WeekDate struct {
    WeekTh    string
    StartTime time.Time
    EndTime   time.Time
}
 
// 将开始时间和结束时间分割为周为单位
func GroupByWeekDate(startTime, endTime time.Time) []WeekDate {
    weekDate := make([]WeekDate, 0)
    diffDuration := endTime.Sub(startTime)
    days := int(math.Ceil(float64(diffDuration / (time.Hour * 24))))+1
 
    currentWeekDate := WeekDate{}
    currentWeekDate.WeekTh = WeekByDate(endTime)
    currentWeekDate.EndTime = endTime
    currentWeekDay := int(endTime.Weekday())
    if currentWeekDay == 0 {
        currentWeekDay = 7
    }
    currentWeekDate.StartTime = endTime.AddDate(0, 0, -currentWeekDay+1)
    nextWeekEndTime := currentWeekDate.StartTime
    weekDate = append(weekDate, currentWeekDate)
 
    for i := 0; i < (days-currentWeekDay)/7; i++ {
        weekData := WeekDate{}
        weekData.EndTime = nextWeekEndTime
        weekData.StartTime = nextWeekEndTime.AddDate(0, 0, -7)
        weekData.WeekTh = WeekByDate(weekData.StartTime)
        nextWeekEndTime = weekData.StartTime
        weekDate = append(weekDate, weekData)
    }
 
    if lastDays := (days - currentWeekDay) % 7; lastDays > 0 {
        lastData := WeekDate{}
        lastData.EndTime = nextWeekEndTime
        lastData.StartTime = nextWeekEndTime.AddDate(0, 0, - lastDays)
        lastData.WeekTh = WeekByDate(lastData.StartTime)
        weekDate = append(weekDate, lastData)
    }
 
    return weekDate
}