You can obtain the request parameters by asking the ActionContext or implementing ParameterAware. Implementing ParameterAware is preferred.

Ask the ActionContext

The request parameters are available on the ActionContext instance, which is made available via ThreadLocal.

Map parameters = ActionContext.getContext().getParameters();

Implement HttpParametersAware

(star) Preferred

 

When the servlet-config Interceptor sees that an Action implements ParameterAware, it passes a Map of the request parameters to the Action's setParameters method.

see struts-default.xml and org.apache.struts.action2.interceptor.Servlet Config Interceptor