October 2022
Beginner to intermediate
390 pages
7h 5m
Chinese
Content preview from Perl语言入门（第8版）
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Perl
模块
｜
219
够高阶。而
Perl
自带的
Path::Class
模块则提供了更为友好的接口：
my $dir = dir( qw(Users fred lib) );
my $subdir = $dir->subdir( 'perl5' ); # Users/fred/lib/perl5
my $parent = $dir->parent; # Users/fred
my $windir = $dir->as_foreign( 'Win32' ); # Users\fred\lib
数据库和
DBI
模块
DBI
（
Database Interface
，数据库接口）模块并未内置于
Perl
标准发行版本中，但它
却是最热门的模块之一，因为许多人或多或少需要连接某种类型的数据库。
DBI
的美
妙之处在于，不管哪种常见的数据库，它都使你可以用相同的接口对其进行操作，
从
CSV
文件到
Oracle
之类的大型数据库服务器，无不如此。它还支持对
ODBC
的
驱动操作，而且有些驱动程序是数据库厂商自行提供的。想了解完整细节，请参阅由
Alligator Descartes
和
Tim Bunce
合著的
Programming the Perl DBI
一书（
O
’
Reilly
出
版）。你也可以访问
DBI
官网。
安装完
DBI
之后，你还必须安装
DBD
（
Database Driver
，数据库驱动程序）。在
Meta CPAN
上搜索一下就能得到一长串 ...
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