The difference of time zone and the time library of go language

UTC,GMT,CST What is it? ？

• You can refer to this article ：https://baijiahao.baidu.com/s?id=1732139602203523267
• UTC Time is slower than the time zone indicated by Shanghai, China 8 Hours .
  • CST： 2022-08-22 00:00:00 +0800 CST
  • UTC： 2022-08-21 16:00:00 +0000 UTC

Go In language time Some common methods of Library

• time.Local (*time.Location): Get the time zone of the current system

• time.UTC (*time.Location): UTC

• func time.Parse(layout string, value string) (time.Time, error)

  • You can convert a string to go Time type . first layout Is the corresponding time template . time Many templates are built in the Library . You can customize FormatTimeShort = “2006-01-02”, The template can only be parsed to date .
  • The default conversion time of this method is UTC Time .
    

• func time.ParseInLocation(layout string, value string, loc *time.Location) (time.Time, error)

  • This method can pass time zone information when parsing .

• func time.Now() time.Time return Current time zone Time for .

• func (time.Time).UTC() time.Time Time that will have a time zone , Turn into UTC Time represented .

• func (time.Time).Unix() int64 This method will Time Type of time converted to Time stamp , Timestamp is time independent . The default is UTC The start of the specified time .

• func time.Unix(sec int64, nsec int64) time.Time This function can convert the timestamp into Current time zone Of Time Type time .

• func (time.Time).MarshalJSON() ([]byte, error) It's time to analyze json Function of format .

Be careful ：

• When using time , Pay attention to the conversion of time zones .
• Generally, when reading the local time zone , Pay attention to the setting of the local time zone ：
  • such as ubuntu System , Input date Instructions , You can get the current time .
  • timedatectl set-timezone Asia/Shanghai Set the current time zone to Time zone in Shanghai, China .