Java servlet访问配置文件

I am deploying a war file to glassfish and would like to know if it is possible to have a file that can have properties stored in them that can be accessed within my web methods. The catch is I would like to change the file as business requests change wihtout having to recompile. I could store it in the DB or have it as system properties on glassfish itself but would like to know if the file way is possible. I am deploying a war file to glassfish and woul