perl - 格式化日期的简单方法

Question

我写了一个 perl 脚本来获取日期时间。它确实有效，但我想知道是否有更简单的方法将日期格式化为输出。

#!/usr/bin/perl
use DateTime;

my $dt          = DateTime->now( time_zone => 'local' );
$myTimeStamp    = $dt->subtract( days => 1 );
$myYear         = $myTimeStamp->year;
$myMonth        = $myTimeStamp->month;
if ( length( $myMonth ) == 1 ) {
    $myMonth = "0$myMonth";
}
$myDay          = $myTimeStamp->day;
if ( length( $myDay ) == 1 ) {
    $myDay = "0$myDay";
}
$myHour         = $myTimeStamp->hour;
if ( length( $myHour ) == 1 ) {
    $myHour = "0$myHour";
}
#$myDir          = "/var/tmp/logs/$myYear/$myMonth/$myYear$myMonth-";

print "--> $myYear $myMonth $myDay $myHour\n";
# --> 2012 02 28 02
exit 0;

Answer 1

DateTime为此提供了 format_cldr 方法:

use DateTime;

my $myTimeStamp = DateTime->now->subtract( days => 1 );

printf "--> %s\n", $myTimeStamp->format_cldr('yyyy MM dd HH');
# --> 2012 02 28 02