newbie trying to use Ant/Maven to build external library jar files for glassfish web app

I'm trying to use Authorize.net's java SDK found here...

http://ift.tt/1M8lsKi

My problem is that my Java experience is limited to coding java in a text editor, and I've never used Ant or Maven.

I know I need to import the folder net.authorize.* in my project, but I'm not sure how exactly to do this. So far, I've placed the net folder and all its contents into GlassFish 3.1.2's ~/glassfish3/glassfish/domains/domain1/lib/ folder, and restarted GlassFish. When I access a jsp that has an <%@ page import="net.authorize.sim.*" %> line, I get this error:

org.apache.jasper.JasperException: PWC6033: Error in Javac compilation for JSP
PWC6199: Generated servlet error:
package net.authorize.sim does not exist

Is this because I need to build the jar files?

Could someone walk a newbie through this process. From the command line, I can do yum info ant and it shows Available Packages for ant (x86_64).

The SDK webpage instructs:

To compile the SDK and create a jar...
$ ant jar

but what directory should I execute that line in, etc.?

I'm using java 1.7 on CentOS.