You can obtain the request by asking the ActionContext or implementing ServletResponseAware. Implementing ServletResponseAware is preferred.
Ask the ActionContext
The response is available on the ActionContext instance, which is made available via ThreadLocal.
Code Block |
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HttpServletResponse response = ServletActionContext.getResponse(); |
Implement ServletResponseAware
Preferred
- Ensure that
servlet-config
Interceptor is included in the Action's stack.The default stack already includes
servlet-config
.
- Edit the Action so that it implements the ServletResponseAware interface.
- The ServletResponseAware interface expects a
setServletResponse
method. You may wish to include a companiongetServletResponse
method.
- The ServletResponseAware interface expects a
- At runtime, call
getServletResponse
to obtain a reference to the response object.Info When the
servlet-config
Interceptor sees that an Action implements ServletResponseAware, it passes a reference to the request the Action'ssetServletResponse
method.
@see action struts-default.xmlTip It is more difficult to test Actions with runtime dependencies on HttpServletReponse. Only implement ServletResponseAware as a last resort. A better approach to solving a use case involving the response may be with a custom Result Type.
@see org.apache.struts.action2.interceptor.ServletResponseAware
@see org.apache.struts.action2.interceptor.ServletConfigInterceptor