func GetTimeByTimeZone(zone string) string {
	loc, _ := time.LoadLocation(zone)
	return time.Now().In(loc).Format(tmFmtMissMS)
}
GetTimeByTimeZone get time by zone.
package gtime
import (
	"time"
)
const (
	tmFmtWithMS = "2006-01-02 15:04:05.999"
	tmFmtMissMS = "2006-01-02 15:04:05"
)
var TimeZone = "Asia/Shanghai"
func SetTimeZone(zone string) {
	TimeZone = zone
}
func FormatTime(t time.Time) string {
	return t.Format(tmFmtWithMS)
}
func FormatTime19(t time.Time) string {
	return t.Format(tmFmtMissMS)
}
func GetLoc(zone string) *time.Location {
	loc, _ := time.LoadLocation(TimeZone)
	return loc
}
func GetCurrentLocalTime() string {
	return GetTimeByTimeZone(TimeZone)
}