I meet a request to upload files with spring resttemplate to upload files with http header "multipart/form-data", also some other normal parameters need to be posted. how to implements that?
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3 Answers
You can use the following code in your application to have both multipart-file and normal request parameters at the same time:
Note:
- replace the URL with your own
- replace parameter names and values according to your normal parameters
String url = "http://example.com"; String fileAbsPath = "absolute path of your file"; String fileName = new File(fileAbsPath).getName(); Files.readAllBytes(Paths.get(fileAbsPath)); MultiValueMap<String, Object> data = new LinkedMultiValueMap<String, Object>(); ByteArrayResource resource = new ByteArrayResource(Files.readAllBytes(Paths.get(fileAbsPath))) { @Override public String getFilename() { return fileName; } }; data.add("file", resource); HttpHeaders requestHeaders = new HttpHeaders(); requestHeaders.set("file","application/pdf"); UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url) .queryParam("param1", "value1") .queryParam("param2", "value2"); HttpEntity<> entity = new HttpEntity<> (data, requestHeaders); RestTemplate restTemplate = new RestTemplate(); ResponseEntity<String> result =restTemplate.exchange( builder.toUriString(), HttpMethod.POST, entity, String.class ); System.out.println(result.getBody()); 
1 Comment
AviX
I too had this issue, i tried it but i am getting: Caused by: org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
you can use this code.
HttpHeaders headers = getCASHeaders(MediaType.MULTIPART_FORM_DATA); LinkedMultiValueMap<String, Object> params = new LinkedMultiValueMap<>(); params.add("fileField", new FileSystemResource(""));//get file resource params.add("stringfield", stringPayload); HttpEntity requestEntity = new HttpEntity<>(params, headers); ResponseEntity<CasAssetApiResponse> response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, String.class); This will send post call with two param, you can add more according to your wish.
Please have a look at this stackoverflow answer as well
1 Comment
rellocs wood
but in this way,the value of 'stringfield' is a LinkedList, not a String...., their api does recognize the value...
I got the error "cannot be cast to java.lang.String" although my code does not have any casting.
1 Comment
Mickle Foretic
This is not an answer to the question.