Usually, if you're building a web application, you'll have some kind of library that you use. Whether it's a large framework such as Spring or Hibernate, or something more refined such as PrimeFaces or Apache Commons Email, you'll need to bring in some set of JAR files to your web application.
One way to add these libraries to your application is to use the relative path. Take a look at this code snippet:
public File[] getWebInfLibs() {
File dir = new File("target/my-app/WEB-INF/lib");
return dir.listFiles();
}Assuming that you are using Maven, this will give you all files that were in your exploded directory's WEB-INF/lib directory. These files do get copied in place early enough in the build that they should be available during testing. Although, there may be reasons you only want certain files. You can manually choose each file from here and only install the files you want; however, ShrinkWrap has a more fluent API that better matches to your Maven build...