时间 time
1. 时间格式化
const DEFAULT_TIME_FORMAT = "2006-01-02 15:04:05"
const YYYY_MM_DD = "2006-01-02"
func printTime(t time.Time) {
fmt.Println(t.Format(DEFAULT_TIME_FORMAT))
year, week := t.ISOWeek()
fmt.Printf("%4d年 第%02d周 %s\n", year, week, t.Weekday())
}
func TestTimeFormat(te *testing.T) {
var t time.Time = time.Now()
fmt.Println(t.String())
fmt.Println(t.Format(time.RFC822))
fmt.Printf("%4d-%02d-%02d %02d:%02d:%02d\n", t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
printTime(t)
}
2. 获取时间
func TestGetTime(te *testing.T) {
t, err := time.Parse(DEFAULT_TIME_FORMAT, "2021-05-01 10:14:25")
if err != nil {
fmt.Printf("An error occurred\n")
return // exit the function on error
}
printTime(t)
}
func GetTime(timeString string) time.Time {
t, err := time.Parse(YYYY_MM_DD, timeString)
if err != nil {
panic("时间格式有误")
}
return t
}
func TestGetTime2(te *testing.T) {
location, err := time.LoadLocation("UTC")
if err != nil {
return
}
t := time.Date(2021, 10, 1, 9, 15, 0, 0, location)
printTime(t)
}
3. 时间计算
func TestTimeAdd(te *testing.T) {
t := time.Now()
var one_week time.Duration = 60 * 60 * 24 * 7 * 1e9 // must be in nanosec (1s = 1000000000 ns)
one_week_after := t.Add(one_week)
printTime(one_week_after)
}
4. 线程休眠
// 休眠
func TestTimeSleep(t *testing.T) {
printTime(time.Now())
var second5 time.Duration = 5 * 1e9 // 5s
time.Sleep(second5)
printTime(time.Now())
}
