商店的时间内在GMT。在GMT进行所有操作。然后在最后一刻,就像您即将向用户显示结果一样,,然后将转换为用户的本地时间。
我推荐使用Date::Parse,但是你必须增加它的时区偏移量,因为它目前没有印度支那夏令时和日本夏令时。
#! /usr/bin/perl
use warnings;
use strict;
use Date::Format;
use Date::Parse;
# add timezone offsets
$Time::Zone::Zone{icst} = +7*3600;
$Time::Zone::Zone{jdt} = +9*3600;
while (<DATA>) {
chomp;
warn("$0: failed conversion for $_\n"), next
unless defined(my $time_t = str2time $_);
my @t = gmtime($time_t);
print $_, " => ", strftime("%Y-%m-%d %H:%M:%S", @t), "\n";
}
__DATA__
Sat Mar 06 09:00:00 ICST 2010
Fri Feb 19 19:30:00 JDT 2010
Fri Feb 19 19:30:00 PST 2010
输出:
Sat Mar 06 09:00:00 ICST 2010 => 2010-03-06 02:00:00
Fri Feb 19 19:30:00 JDT 2010 => 2010-02-19 10:30:00
Fri Feb 19 19:30:00 PST 2010 => 2010-02-20 03:30:00
支持你想查询,存储在格林尼治标准时间加上偏移(即,从格林尼治标准时间从API的本地时间)的时间。请注意,下面的代码假设,如果str2time
可以解析给定的时间,strptime
也可以。更改环路
my @dates;
while (<DATA>) {
chomp;
warn("$0: failed conversion for $_\n"), next
unless defined(my $time_t = str2time $_);
my $zone = (strptime $_)[-1];
my @t = gmtime($time_t);
push @dates => [ strftime("%Y-%m-%d %H:%M:%S", @t)
, sprintf("%+03d:%02d",
int($zone/3600),
int($zone % 3600)/60)
, $_
];
}
随着收集的时间,呈现为SQL:
print "DROP TABLE IF EXISTS dates;\n",
"CREATE TABLE dates (date DATETIME, offset CHAR(6));\n",
"INSERT INTO dates (date,offset) VALUES\n",
join(",\n\n" =>
map(" -- $_->[2]\n" .
" ('$_->[0]','$_->[1]')", @dates)),
";\n",
"SELECT CONVERT_TZ(date,'+00:00',offset) FROM dates;\n"
输出是
DROP TABLE IF EXISTS dates;
CREATE TABLE dates (date DATETIME, offset CHAR(6));
INSERT INTO dates (date,offset) VALUES
-- Sat Mar 06 09:00:00 ICST 2010
('2010-03-06 02:00:00','+07:00'),
-- Fri Feb 19 19:30:00 JDT 2010
('2010-02-19 10:30:00','+09:00'),
-- Fri Feb 19 19:30:00 PST 2010
('2010-02-20 03:30:00','-08:00');
SELECT CONVERT_TZ(date,'+00:00',offset) FROM dates;
而且我们可以把它管mysql
:
$ ./prog.pl | mysql -u username -D dbname
CONVERT_TZ(date,'+00:00',offset)
2010-03-06 09:00:00
2010-02-19 19:30:00
2010-02-19 19:30:00
一个很好的开始:http://datetime.perl .org /?模块 – 2010-02-12 15:53:36