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You can obtain the request by asking the ActionContext or implementing ServletResponseAware. Implementing ServletResponseAware is preferred.
The response is available on the ActionContext instance, which is made available via ThreadLocal.
Preferred
servlet-config Interceptor is included in the Action's stack.
servlet-config.setServletResponse method. You may wish to include a companion getServletResponse method.getServletResponse to obtain a reference to the response object.
@see struts-default.xml