private static final long serialVersionUID = -4953828716980720439L;
public void execute(ActionInvocation invocation) throws Exception {
if( invocation.getAction() instanceof ImageAction){
ImageAction action = (ImageAction)invocation.getAction() ;
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType(action.getImageContentType());
response.getOutputStream().write(action.getImageInBytes());
response.getOutputStream().flush();
}
}