How FilterDispatcher reads the Struts.xml file

For Struts2 , we simply add this line inside web.xml

<filter>
  <filter-name>struts2</filter-name>
  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>

<filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

But could anybody please te开发者_如何学运维ll me , how it will know the path of struts.xml file ??

Struts2 looks for the struts.xml file at the root of the classpath. You can override the location using the config init param, if needed.

The actual configuration is set up by the Dispatcher class, irrespective of whether you use the older FilterDispatcher or the newer StrutsPrepareAndExecuteFilter.