ee.Date.format

Chuyển đổi ngày thành chuỗi.

Cách sử dụng	Giá trị trả về
Date.format(format, timeZone)	Chuỗi

Đối số	Loại	Thông tin chi tiết
this: date	Ngày
format	Chuỗi, mặc định: null	Một mẫu, như mô tả tại http://joda-time.sourceforge.net/apidocs/org/joda/time/format/DateTimeFormat.html; nếu bỏ qua, hệ thống sẽ sử dụng định dạng ngày tiêu chuẩn ISO.
timeZone	Chuỗi, mặc định: null	Múi giờ (ví dụ: "America/Los_Angeles"); mặc định là UTC.

Ví dụ

Trình soạn thảo mã (JavaScript)

// Various examples of ee.Date.format with Joda-Time formatting and time zones.

var date = ee.Date('2020-08-18');  // Defaults to UTC
print(date);  // Date (2020-08-18 00:00:00)

// List of time zones:
// https://www.joda.org/joda-time/timezones.html

print(date.format(null, 'GMT'));  // 2020-08-18T00:00:00
print(date.format(null, 'Etc/GMT'));  // 2020-08-18T00:00:00
print(date.format(null, 'Etc/GMT+0'));  //  2020-08-18T00:00:00
print(date.format(null, 'Zulu'));  // 2020-08-18T00:00:00
print(date.format(null, 'UTC'));  // 2020-08-18T00:00:00

print(date.format(null, 'America/Los_Angeles'));  // 2020-08-17T17:00:00
print(date.format(null, 'US/Pacific'));  // 2020-08-17T17:00:00
print(date.format(null, 'Etc/GMT+8'));  // 2020-08-17T17:00:00
print(date.format(null, 'PST8PDT'));  // 2020-08-17T17:00:00

print(date.format(null, 'Australia/Tasmania'));  // 2020-08-18T10:00:00
print(date.format(null, 'Etc/GMT-10'));  // 2020-08-18T10:00:00

// Reference for Joda-Time format characters:
// https://joda-time.sourceforge.net/apidocs/org/joda/time/format/DateTimeFormat.html

var datetime = ee.Date('1975-07-23T21:13:59');  // Defaults to UTC
print(datetime); // Date (1972-07-25 21:13:59)

// year of era and era
print(datetime.format('YYYY GG'));  // 1975 AD
// century and year
print(datetime.format('CC YY'));  // 19 75
// weekyear and week of weekyear
print(datetime.format('xxxx ww'));  // 1975 30

// year and day of year
print(datetime.format('yy DDD'));  // 75 204
// month of year and day of month
print(datetime.format('MM dd'));  // 07 23

// day of week number and day of week text
print(datetime.format('e E'));  // 3 Wed
print(datetime.format('e EEEEEEEE'));  // 3 Wednesday

// half of day, hour of halfday, and clockhour of halfday
print(datetime.format('a K h'));  // PM 9 9
print(datetime.format('a KK hh'));  // PM 09 09

// hour of day, clockhour of day, minute, second, fraction of second
print(datetime.format('H k m s S'));  // 21 21 13 59 0
print(datetime.format('HH kk mm ss SS'));  // 21 21 13 59 00

// time zone
print(datetime.format('z'));  // UTC
print(datetime.format('zzzz'));  // Coordinated Universal Time
print(datetime.format('z', 'PST8PDT'));  // PDT
print(datetime.format('zzzz', 'PST8PDT'));  // Pacific Daylight Time

// time zone offset/id
print(datetime.format('Z'));  // +0000
print(datetime.format('ZZ'));  // +00:00
print(datetime.format('ZZZ'));  // UTC
print(datetime.format('Z', 'PST8PDT'));  // -0700
print(datetime.format('ZZ', 'PST8PDT'));  // -07:00
print(datetime.format('ZZZ', 'PST8PDT'));  // PST8PDT

// single quotes for text
print(datetime.format("YY 'yada' MM"));  // 75 yada 07
// '' for a single quote
print(datetime.format("YY ''MM'' dd"));  // 75 '07' 23

Thiết lập Python

Hãy xem trang Môi trường Python để biết thông tin về API Python và cách sử dụng geemap cho quá trình phát triển tương tác.

import ee
import geemap.core as geemap

Colab (Python)

# Various examples of ee.Date.format with Joda-Time formatting and time zones.

date = ee.Date('2020-08-18')  # Defaults to UTC
display(date)  # Date (2020-08-18 00:00:00)

# List of time zones:
# https://www.joda.org/joda-time/timezones.html

display(date.format(None, 'GMT'))  # 2020-08-18T00:00:00
display(date.format(None, 'Etc/GMT'))  # 2020-08-18T00:00:00
display(date.format(None, 'Etc/GMT+0'))  #  2020-08-18T00:00:00
display(date.format(None, 'Zulu'))  # 2020-08-18T00:00:00
display(date.format(None, 'UTC'))  # 2020-08-18T00:00:00

display(date.format(None, 'America/Los_Angeles'))  # 2020-08-17T17:00:00
display(date.format(None, 'US/Pacific'))  # 2020-08-17T17:00:00
display(date.format(None, 'Etc/GMT+8'))  # 2020-08-17T17:00:00
display(date.format(None, 'PST8PDT'))  # 2020-08-17T17:00:00

display(date.format(None, 'Australia/Tasmania'))  # 2020-08-18T10:00:00
display(date.format(None, 'Etc/GMT-10'))  # 2020-08-18T10:00:00

# Reference for Joda-Time format characters:
# http://joda-time.sourceforge.net/apidocs/org/joda/time/format/DateTimeFormat.html

datetime = ee.Date('1975-07-23T21:13:59')  # Defaults to UTC
display(datetime)  # Date (1972-07-25 21:13:59)

# year of era and era
display(datetime.format('YYYY GG'))  # 1975 AD
# century and year
display(datetime.format('CC YY'))  # 19 75
# weekyear and week of weekyear
display(datetime.format('xxxx ww'))  # 1975 30

# year and day of year
display(datetime.format('yy DDD'))  # 75 204
# month of year and day of month
display(datetime.format('MM dd'))  # 07 23

# day of week number and day of week text
display(datetime.format('e E'))  # 3 Wed
display(datetime.format('e EEEEEEEE'))  # 3 Wednesday

# half of day, hour of halfday, and clockhour of halfday
display(datetime.format('a K h'))  # PM 9 9
display(datetime.format('a KK hh'))  # PM 09 09

# hour of day, clockhour of day, minute, second, fraction of second
display(datetime.format('H k m s S'))  # 21 21 13 59 0
display(datetime.format('HH kk mm ss SS'))  # 21 21 13 59 00

# time zone
display(datetime.format('z'))  # UTC
display(datetime.format('zzzz'))  # Coordinated Universal Time
display(datetime.format('z', 'PST8PDT'))  # PDT
display(datetime.format('zzzz', 'PST8PDT'))  # Pacific Daylight Time

# time zone offset/id
display(datetime.format('Z'))  # +0000
display(datetime.format('ZZ'))  # +00:00
display(datetime.format('ZZZ'))  # UTC
display(datetime.format('Z', 'PST8PDT'))  # -0700
display(datetime.format('ZZ', 'PST8PDT'))  # -07:00
display(datetime.format('ZZZ', 'PST8PDT'))  # PST8PDT

# single quotes for text
display(datetime.format("YY 'yada' MM"))  # 75 yada 07
# '' for a single quote
display(datetime.format("YY ''MM'' dd"))  # 75 '07' 23