How to use multiple Struts 2x configuration files ?

In Struts 2x, you should always have module-wise struts configuration files.

Example 

struts-audit.xml – Put all audit module settings here.

struts-user.xml – Put all user modules settings here. 

struts.xml – Put default settings and include the struts-audit.xml and struts-user.xml.

struts.xml

<struts>

  <package name="default" namespace="/" extends="struts-default">

     .......

  </package>

  <include file="user/struts-user.xml" />

  <include file="audit/struts-audit.xml" />

</struts>