增加 Golang Time 格式化输出。
Signed-off-by: rick.chan <cy@haoan119.com>
This commit is contained in:
rick.chan
parent
4a5a154ab8
commit
6ee5b499fa
@ -0,0 +1,183 @@
|
||||
# Golang Time 格式化输出
|
||||
|
||||
```go
|
||||
time.Now().Format("2006-01-02 15:04:05")
|
||||
```
|
||||
|
||||
Format layout 如下表：
|
||||
|
||||
| Unit | Golang Layout | Examples | Note |
|
||||
|-------------|---------------|-----------------------------------|----------------------------------|
|
||||
| Year | 06 | 21, 81, 01 | |
|
||||
| Year | 2006 | 2021, 1981, 0001 | |
|
||||
| Month | January | January, February, December | |
|
||||
| Month | Jan | Jan, Feb, Dec | |
|
||||
| Month | 1 | 1, 2, 12 | |
|
||||
| Month | 01 | 01, 02, 12 | |
|
||||
| Day | Monday | Monday, Wednesday, Sunday | |
|
||||
| Day | Mon | Mon, Wed, Sun | |
|
||||
| Day | 2 | 1, 2, 11, 31 | |
|
||||
| Day | 02 | 01, 02, 11, 31 | zero padded day of the month |
|
||||
| Day | _2 | ⎵1, ⎵2, 11, 31 | space padded day of the month |
|
||||
| Day | 002 | 001, 002, 011, 031, 145, 365, 366 | zero padded day of the year |
|
||||
| Day | __2 | ⎵⎵1, ⎵⎵2, ⎵11, ⎵31, 365, 366 | space padded day of the year |
|
||||
| Part of day | PM | AM, PM | |
|
||||
| Part of day | pm | am, pm | |
|
||||
| Hour 24h | 15 | 00, 01, 12, 23 | |
|
||||
| Hour 12h | 3 | 1, 2, 12 | |
|
||||
| Hour 12h | 03 | 01, 02, 12 | |
|
||||
| Minute | 4 | 0, 4 ,10, 35 | |
|
||||
| Minute | 04 | 00, 04 ,10, 35 | |
|
||||
| Second | 5 | 0, 5, 25 | |
|
||||
| Second | 05 | 00, 05, 25 | |
|
||||
| Decisecond | .0 | .1 | Trailing zeros included (. or ,) |
|
||||
| Millisecond | .000 | .100 | Trailing zeros included (. or ,) |
|
||||
| Nanosecond | .000000000 | .199000000 | Trailing zeros included (. or ,) |
|
||||
| Decisecond | .9 | .1 | Trailing zeros omitted (. or ,) |
|
||||
| Millisecond | .999 | .19 | Trailing zeros omitted (. or ,) |
|
||||
| Nanosecond | .999999999 | .199 | Trailing zeros omitted (. or ,) |
|
||||
| Time zone | MST | UTC, MST, CET | |
|
||||
| Time zone | Z07 | Z, +08, -05 | Z is for UTC |
|
||||
| Time zone | Z0700 | Z, +0800, -0500 | Z is for UTC |
|
||||
| Time zone | Z070000 | Z, +080000, -050000 | Z is for UTC |
|
||||
| Time zone | Z07:00 | Z, +08:00, -05:00 | Z is for UTC |
|
||||
| Time zone | Z07:00:00 | Z, +08:00:00, -05:00:00 | Z is for UTC |
|
||||
| Time zone | -07 | +00, +08, -05 | |
|
||||
| Time zone | -0700 | +0000, +0800, -0500 | |
|
||||
| Time zone | -070000 | +000000, +080000, -050000 | |
|
||||
| Time zone | -07:00 | +00:00, +08:00, -05:00 | |
|
||||
| Time zone | -07:00:00 | +00:00:00, +08:00:00, -05:00:00 | |
|
||||
|
||||
还可以使用 Golang 预先设定好的 Layout 风格：
|
||||
|
||||
```go
|
||||
now := time.Now()
|
||||
fmt.Println(now) // 2009-11-10 23:00:00 +0000 UTC m=+0.000000001
|
||||
fmt.Println(now.Format(time.Layout)) // 01/02 03:04:05PM '06 -0700
|
||||
fmt.Println(now.Format(time.ANSIC)) // Mon Jan _2 15:04:05 2006
|
||||
fmt.Println(now.Format(time.UnixDate)) // Mon Jan _2 15:04:05 MST 2006
|
||||
fmt.Println(now.Format(time.RubyDate)) // Mon Jan 02 15:04:05 -0700 2006
|
||||
fmt.Println(now.Format(time.RFC822)) // 02 Jan 06 15:04 MST
|
||||
fmt.Println(now.Format(time.RFC850)) // Monday, 02-Jan-06 15:04:05 MST
|
||||
fmt.Println(now.Format(time.Kitchen)) // 3:04PM
|
||||
fmt.Println(now.Format(time.Stamp)) // Jan _2 15:04:05
|
||||
```
|
||||
|
||||
定义在 time 包的 format.go 文件中：
|
||||
|
||||
```go
|
||||
// These are predefined layouts for use in Time.Format and time.Parse.
|
||||
// The reference time used in these layouts is the specific time stamp:
|
||||
//
|
||||
// 01/02 03:04:05PM '06 -0700
|
||||
//
|
||||
// (January 2, 15:04:05, 2006, in time zone seven hours west of GMT).
|
||||
// That value is recorded as the constant named Layout, listed below. As a Unix
|
||||
// time, this is 1136239445. Since MST is GMT-0700, the reference would be
|
||||
// printed by the Unix date command as:
|
||||
//
|
||||
// Mon Jan 2 15:04:05 MST 2006
|
||||
//
|
||||
// It is a regrettable historic error that the date uses the American convention
|
||||
// of putting the numerical month before the day.
|
||||
//
|
||||
// The example for Time.Format demonstrates the working of the layout string
|
||||
// in detail and is a good reference.
|
||||
//
|
||||
// Note that the RFC822, RFC850, and RFC1123 formats should be applied
|
||||
// only to local times. Applying them to UTC times will use "UTC" as the
|
||||
// time zone abbreviation, while strictly speaking those RFCs require the
|
||||
// use of "GMT" in that case.
|
||||
// In general RFC1123Z should be used instead of RFC1123 for servers
|
||||
// that insist on that format, and RFC3339 should be preferred for new protocols.
|
||||
// RFC3339, RFC822, RFC822Z, RFC1123, and RFC1123Z are useful for formatting;
|
||||
// when used with time.Parse they do not accept all the time formats
|
||||
// permitted by the RFCs and they do accept time formats not formally defined.
|
||||
// The RFC3339Nano format removes trailing zeros from the seconds field
|
||||
// and thus may not sort correctly once formatted.
|
||||
//
|
||||
// Most programs can use one of the defined constants as the layout passed to
|
||||
// Format or Parse. The rest of this comment can be ignored unless you are
|
||||
// creating a custom layout string.
|
||||
//
|
||||
// To define your own format, write down what the reference time would look like
|
||||
// formatted your way; see the values of constants like ANSIC, StampMicro or
|
||||
// Kitchen for examples. The model is to demonstrate what the reference time
|
||||
// looks like so that the Format and Parse methods can apply the same
|
||||
// transformation to a general time value.
|
||||
//
|
||||
// Here is a summary of the components of a layout string. Each element shows by
|
||||
// example the formatting of an element of the reference time. Only these values
|
||||
// are recognized. Text in the layout string that is not recognized as part of
|
||||
// the reference time is echoed verbatim during Format and expected to appear
|
||||
// verbatim in the input to Parse.
|
||||
//
|
||||
// Year: "2006" "06"
|
||||
// Month: "Jan" "January" "01" "1"
|
||||
// Day of the week: "Mon" "Monday"
|
||||
// Day of the month: "2" "_2" "02"
|
||||
// Day of the year: "__2" "002"
|
||||
// Hour: "15" "3" "03" (PM or AM)
|
||||
// Minute: "4" "04"
|
||||
// Second: "5" "05"
|
||||
// AM/PM mark: "PM"
|
||||
//
|
||||
// Numeric time zone offsets format as follows:
|
||||
//
|
||||
// "-0700" ±hhmm
|
||||
// "-07:00" ±hh:mm
|
||||
// "-07" ±hh
|
||||
// "-070000" ±hhmmss
|
||||
// "-07:00:00" ±hh:mm:ss
|
||||
//
|
||||
// Replacing the sign in the format with a Z triggers
|
||||
// the ISO 8601 behavior of printing Z instead of an
|
||||
// offset for the UTC zone. Thus:
|
||||
//
|
||||
// "Z0700" Z or ±hhmm
|
||||
// "Z07:00" Z or ±hh:mm
|
||||
// "Z07" Z or ±hh
|
||||
// "Z070000" Z or ±hhmmss
|
||||
// "Z07:00:00" Z or ±hh:mm:ss
|
||||
//
|
||||
// Within the format string, the underscores in "_2" and "__2" represent spaces
|
||||
// that may be replaced by digits if the following number has multiple digits,
|
||||
// for compatibility with fixed-width Unix time formats. A leading zero represents
|
||||
// a zero-padded value.
|
||||
//
|
||||
// The formats __2 and 002 are space-padded and zero-padded
|
||||
// three-character day of year; there is no unpadded day of year format.
|
||||
//
|
||||
// A comma or decimal point followed by one or more zeros represents
|
||||
// a fractional second, printed to the given number of decimal places.
|
||||
// A comma or decimal point followed by one or more nines represents
|
||||
// a fractional second, printed to the given number of decimal places, with
|
||||
// trailing zeros removed.
|
||||
// For example "15:04:05,000" or "15:04:05.000" formats or parses with
|
||||
// millisecond precision.
|
||||
//
|
||||
// Some valid layouts are invalid time values for time.Parse, due to formats
|
||||
// such as _ for space padding and Z for zone information.
|
||||
const (
|
||||
Layout = "01/02 03:04:05PM '06 -0700" // The reference time, in numerical order.
|
||||
ANSIC = "Mon Jan _2 15:04:05 2006"
|
||||
UnixDate = "Mon Jan _2 15:04:05 MST 2006"
|
||||
RubyDate = "Mon Jan 02 15:04:05 -0700 2006"
|
||||
RFC822 = "02 Jan 06 15:04 MST"
|
||||
RFC822Z = "02 Jan 06 15:04 -0700" // RFC822 with numeric zone
|
||||
RFC850 = "Monday, 02-Jan-06 15:04:05 MST"
|
||||
RFC1123 = "Mon, 02 Jan 2006 15:04:05 MST"
|
||||
RFC1123Z = "Mon, 02 Jan 2006 15:04:05 -0700" // RFC1123 with numeric zone
|
||||
RFC3339 = "2006-01-02T15:04:05Z07:00"
|
||||
RFC3339Nano = "2006-01-02T15:04:05.999999999Z07:00"
|
||||
Kitchen = "3:04PM"
|
||||
// Handy time stamps.
|
||||
Stamp = "Jan _2 15:04:05"
|
||||
StampMilli = "Jan _2 15:04:05.000"
|
||||
StampMicro = "Jan _2 15:04:05.000000"
|
||||
StampNano = "Jan _2 15:04:05.000000000"
|
||||
DateTime = "2006-01-02 15:04:05"
|
||||
DateOnly = "2006-01-02"
|
||||
TimeOnly = "15:04:05"
|
||||
)
|
||||
```
|
||||
Loading…
x
Reference in New Issue
Block a user