How to convert time format of file date

Question

Julian Zeitlhöfler 2023-3-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1927675-how-to-convert-time-format-of-file-date

评论： Julian Zeitlhöfler 2023-3-13

采纳的回答： Stephen23

Hello, I want to convert the date string obtained by file.date to the format yyyymmdd_HHMMSS, i.e.,

'13-Mrz-2023 09:19:45'

to

'20230313_091945'.

I want to make the time being UTC and the converion applicable for all system languages (de_DE, en_US, etc.), i.e., system independent.

I'm struggling with the locale parameter ('Mrz' might be 'Mar' in English languages).

The MATLAB version is 2017b.

Thank you for your help.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Stephen23 2023-3-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1927675-how-to-convert-time-format-of-file-date#answer_1191725

编辑：Stephen23 2023-3-13

在 MATLAB Online 中打开

"Hello, I want to convert the date string obtained by file.date to the format yyyymmdd_HHMMSS, i.e.,"

A much simpler and much more robust approach is to use the DATENUM field (assuming that you are working with the output from the DIR function). Then you can trivially avoid all of the hassle of different date locales. For example:

writematrix(pi,'myfile.txt')
S = dir('*.txt') % Use the DATENUM field, not the locale-dependent DATE field!
S = struct with fields:
       name: 'myfile.txt'
     folder: '/users/mss.system.eZW9Qf'
       date: '13-Mar-2023 09:26:30'
      bytes: 17
      isdir: 0
    datenum: 7.3896e+05
T = datetime(S(1).datenum, 'ConvertFrom','datenum', 'Format','uuuuMMdd_HHmmss', 'TimeZone','local')
T = datetime
   20230313_092630
T.TimeZone = 'Z' % UTC
T = datetime
   20230313_092630