import org.apache.struts2.convention.annotation.InterceptorRef; //导入依赖的package包/类
@Action(value = "anno4", interceptorRefs = @InterceptorRef("auth"), results = {
        @Result(type = "stream", params = { "inputName", "inputStream", "contentDisposition",
                "attachment;filename=\"${downloadFileName}\"", "bufferSize", "512" }) }, params = {})
// @Action(value = "anno4")
public void anno4() throws IOException {

    ServletActionContext.getResponse().setContentType("text/html;charset=utf-8");
    PrintWriter out = ServletActionContext.getResponse().getWriter();
    try {
        out.print("TestStruts2ActionAnno4 anno4()");
        out.flush();
        out.close();
    }
    catch (Exception ex) {
        ex.printStackTrace();
    }
}
 

import org.apache.struts2.convention.annotation.InterceptorRef; //导入依赖的package包/类
@Override
public List<InterceptorMapping> build(Class<?> actionClass, PackageConfig.Builder builder, String actionName,
		Action annotation) {
	List<InterceptorMapping> interceptorList = new ArrayList<>(10);

	// from @InterceptorRefs annotation
	InterceptorRefs interceptorRefs = AnnotationUtils.findAnnotation(actionClass, InterceptorRefs.class);
	if (interceptorRefs != null) {
		interceptorList.addAll(build(actionClass, interceptorRefs.value(), actionName, builder));
	}

	// from @InterceptorRef annotation
	InterceptorRef interceptorRef = AnnotationUtils.findAnnotation(actionClass, InterceptorRef.class);
	if (interceptorRef != null) {
		interceptorList.addAll(build(actionClass, new InterceptorRef[] { interceptorRef }, actionName, builder));
	}

	// from @Action annotation
	if (annotation != null) {
		InterceptorRef[] interceptors = annotation.interceptorRefs();
		if (interceptors != null) {
			interceptorList.addAll(build(actionClass, interceptors, actionName, builder));
		}
	}

	return interceptorList;
}