I keep my connection info in a config file, so I'll have something like library.site.conf that includes 

DB_NAME         = library
DB_HOST         = localhost
DB_USER         = username
DB_PASS         = password

[download]
Then, in my base DBI package, I have: 
package MyDatabase::DBI;
use base qw(Class::DBI::mysql);
my %config;
use Config::General;
my $conf = new Config::General(
  -ConfigFile => '/usr/local/configfiles/library.site.conf',
  -InterPolateVars => 1
                              );
%config = $conf->getall;

my $dsn = "DBI:mysql:host=$config{DB_HOST};database=$config{DB_NAME}";
my $db_user = $config{DB_USER};
my $db_pass = $config{DB_PASS};

__PACKAGE__->set_db('Main', $dsn, $db_user, $db_pass);
# etc.

[download]

There are a ton of similar ways to do this.

In reply to Re: Class::DBI connect info from file? by jest
in thread Class::DBI connect info from file? by bmoyles

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.