Usage.java

        File file = new ClassPathResource("logo.png").getFile();

        HTTPRequestMultipartBody multipartBody = new HTTPRequestMultipartBody.Builder()
                .addPart("name", request.getName())
                .addPart("file", request.getFile(), request.getFile().getContentType(), request.getFile().getOriginalFilename())
                .addPart("file1", file, null , request.getFile().getOriginalFilename())
                .build();


        HttpRequest  httpRequest = HttpRequest.newBuilder()
                .header("Content-Type",multipartBody.getContentType())
                .uri(new URI("https://webhook.site/7b944491-9fa3-4f2a-92ea-9231d532e86f"))
                .POST(HttpRequest.BodyPublishers.ofByteArray(multipartBody.getBody()))
                .build();
       HttpResponse<String> response = httpClient.send(httpRequest, HttpResponse.BodyHandlers.ofString());