Rest service : issues to download multiple Zip fil

I implemented a Rest Service to donwload files from a directory.
**There is my rest service : No problem here **

@GET
@Path("/download")
@Produces("application/zip")
public Response downloadZippedFile() {

        File file = new 
File("C:/Users/Desktop/Files/201707111513.zip");
        ResponseBuilder responseBuilder = Response.ok((Object) file);
        responseBuilder.header("Content-Disposition", "attachment; 
filename=\"MyJerseyZipFile.zip\"");
        return responseBuilder.build();
}

Résult ==> I can download 201707111513.zip from the browser.
-------------------------------------------------
Now, I am trying download multiple .zip files. it causes issues
There is my 2nd rest service : The main problem

@GET
@Path("/download")
@Produces("application/zip")
public Response downloadZippedFile() {
    ArrayList<String> PdfInputListFiles = new ArrayList<>();

    PdfInputListFiles.add("C:/Users/Desktop/Files/201707111513.zip");
    PdfInputListFiles.add("C:/Users/Desktop/Files/201707111514.zip");
    PdfInputListFiles.add("C:/Users/Desktop/Files/201707111515.zip");


    // to print every file in every PdfInputListFiles 
    for (String myFile : PdfInputListFiles) {

        File file = new File(myFile);
        ResponseBuilder responseBuilder = Response.ok((Object) file);
        responseBuilder.header("Content-Disposition", "attachment; filename=\"MyJerseyZipFile.zip\"");
        return responseBuilder.build();

    }
    return null;
}

Résult ==> I can ONLY download the first file 201707111513.zip.
And it's normale cause of the return responseBuilder.build() line in the end of For loop.
-------------------------------------------------
Now, I am tryin this :

@GET
@Path("/download")
@Produces("application/zip")
public Response downloadZippedFile() {
    ArrayList<String> PdfInputListFiles = new ArrayList<>();

    PdfInputListFiles.add("C:/Users/Desktop/Files/201707111513.zip");
    PdfInputListFiles.add("C:/Users/Desktop/Files/201707111514.zip");
    PdfInputListFiles.add("C:/Users/Desktop/Files/201707111515.zip");


    // to print every file in every PdfInputListFiles 
    for (String myFile : PdfInputListFiles) {

        getFile(myFile);

    }
    return null;
}

public Response getFile(String str) {
    // Response response = null;
    File file = new File(str);
    ResponseBuilder responseBuilder = Response.ok((Object) file);
    responseBuilder.header("Content-Disposition", "attachment; filename=\"MyJerseyZipFile.zip\"");
    return responseBuilder.build();
}

Résult ==> No download is happen, I can't understand why calling getFile method doesn't return any downloaded file.
** I need to download evry file in my list, in other words I have multiple paths and I need to download all those files.
SomeOne can help, or suggest an alternative solution !
Thank you