yyyymmddhhmmss到YYYY-MM-DD hh：mm：ss in perl？ [英] yyyymmddhhmmss to YYYY-MM-DD hh:mm:ss in perl?

问题描述

将yyyymmddhhmmss转换为YYYY-MM-DD的最佳方式是什么？mm：ss和perl？

What is the best way to convert yyyymmddhhmmss to YYYY-MM-DD hh:mm:ss and back in perl?

例如：20130218165601到2013-02 -18 16:56:01回来？
（可以 https://metacpan.org/module/Rose::DateTime

for example: 20130218165601 to 2013-02-18 16:56:01 and back? (can https://metacpan.org/module/Rose::DateTime do it)?

推荐答案

没有regexp >一个模块是这样的。

A module is overkill for this.

# Packed -> ISO
(my $iso_date = $packed_date) =~
   s/^(....)(..)(..)(..)(..)(..)\z/$1-$2-$3 $4:$5:$6/s;

# ISO -> Packed
(my $packed_date = $iso_date) =~
   s/^(....)-(..)-(..) (..):(..):(..)\z/$1$2$3$4$5$6/s;

---

Rose :: DateTime 无法按预期解析打包格式，但您可以使用 DateTime :: Format :: Strptime 。

---

Rose::DateTime cannot parse the "packed" format as intended, but you could use DateTime::Format::Strptime.

use DateTime::Format::Strptime qw( );
my $packed_format = DateTime::Format::Strptime->new(
   pattern  => '%Y%m%d%H%M%S',
   on_error => 'croak',
);
my $iso_format = DateTime::Format::Strptime->new(
   pattern  => '%Y-%m-%d %H:%M:%S',
   on_error => 'croak',
);

# Packed -> ISO
my $iso_date = $iso_format->format_datetime(
   $packed_format->parse_datetime($packed_date)
);

# ISO -> Packed
my $packed_date = $packed_format->format_datetime(
   $iso_format->parse_datetime($iso_date)
);

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