Only accepts one instance of multipart file not an array of multipart file

How do I make it accept an array of multipart files? I also tried to test this to the multipart form of the postman. Unfortunately, I'm getting the same issue.

//xml integration config
<int-http:inbound-gateway
request-channel="requestChannel"
reply-channel="responseChannel"
path="/upload"
request-payload-type="org.springframework.util.LinkedMultiValueMap"
supported-methods="POST"
mapped-request-headers="*">
</int-http:inbound-gateway>

//<\bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

//ServiceActivator
@ServiceActivator(inputChannel="requestChannel", outputChannel="responseChannel")
public Message<?> uploadEcdd(@Payload LinkedMultiValueMap<String, Object> multipartRequest, @Headers MessageHeaders messageHeaders) {

//ex. i uploaded two images, i'm only receiving the first image. what is the cause of this?
System.out.println(multipartRequest.get("files");

}

Start with the XML inbound-gateway configuration and the uploadEcdd service activator shown in the issue. Trace how the multipart request is represented under the "files" key, then verify behavior with a request containing two uploaded images; done means both files are accessible rather than only the first.