I added in some constuctive comments

    @PostMapping(value = "/restCreateDoc")

    public @ResponseBody

    String restCreateDoc(@RequestParam("files") MultipartFile[] uploadfiles) {

    String restCreateDoc(@RequestParam("files") MultipartFile[] uploadfiles) { // WHY DOES THIS TAKE IN AN ARRAY??????

        try {

            CredentialsProvider provider = new BasicCredentialsProvider();

            Credentials credentials = new UsernamePasswordCredentials("admin", "admin");  // provide username & password

            provider.setCredentials(AuthScope.ANY, credentials);

            HttpClient httpClient = HttpClientBuilder.create().setDefaultCredentialsProvider(provider).build();

            String uri = "";           // provide the REST API URI

            String uri = "http://192.168.56.200:8000/LATEST/documents?uri=/final-project/" /* + the name of the file we're trying to upload goes here */;           // provide the REST API URI

            HttpPut put = new HttpPut(uri);