How to turn this POST cURL request into a java code - spring

Question

I have the following cURL request that I want to turn into java code to execute it with spring.
I use it to upload a file, the cURL request works correctly.
curl "https://mywebsite.service-now.com/api/now/attachment/file?table_name=incident&table_sys_id=fa4922f6db3ea30085a0f7871d961999&file_name=test.zip" --request POST --header "Accept:application/json" --header "Authorization:Basic cmVhbHRlc3QyOmJwb3N0QDEyMw==" --header "Content-Type: application/zip" -F "uploadFile=#test.zip"
I will use the following API:
https://docs.servicenow.com/bundle/geneva-servicenow-platform/page/integrate/inbound_rest/reference/r_AttachmentAPI-POST.html
I made a little research and found out that I have to use restTemplate to use 3rd party API.
I also wrote this:
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.TEXT_PLAIN);
headers.add("Authorization", "Basic " + encodePassword());
return headers;
(I made the encodePassword method, that is correct. )
I tried a lot of other stuff but it doesn't work

Answer 1

You have to set the content-type header value to MediaType.MULTIPART_FORM_DATA. When this header is set, RestTemplate automatically marshals the file data along with some metadata.
//Headers
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.MULTIPART_FORM_DATA);
//parameter values
// the getTestFile( ) method generates a file on the fly and returns a FileSystemResource
MultiValueMap<String, Object> map= new LinkedMultiValueMap<>();
map.add("file", getTestFile();
...
//create request
HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<MultiValueMap<String, String>>(map, headers);
ResponseEntity<String> response = restTemplate.postForEntity( url, request , String.class );