RestTemplate 使用multipart/form-data 传送文件流参数

form-data 格式参数

MultiValueMap<String, Object> req = new LinkedMultiValueMap<>();

两种方式，都是根据文件路径，然后传参

第一中 FileSystemResource

 FileSystemResource resource = new FileSystemResource(new File("G:\\project\\1.jpg"));
        reqMap.add("topk", "1");
        reqMap.add("image",resource);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.parseMediaType("multipart/form-data"));
        HttpEntity<?> requestEntity = new HttpEntity(reqMap, headers);
        ResponseEntity<Object> responseEntity = restTemplate.postForEntity(imageSearchUrl,requestEntity,Object.class);

第二种 流方式

        final FileInputStream in = new FileInputStream(new File("G:\\project\\1.jpg"));
        Resource resource = new InputStreamResource(in){
            //文件长度,单位字节
            @Override
            public long contentLength() throws IOException {
                long size = in.available();
                return size;
            }
            //文件名
            @Override
            public String getFilename(){
                return responseInfo.getFilename();
            }
        };

标签：FileSystemResource,form,RestTemplate,reqMap,multipart,new,data
来源： https://www.cnblogs.com/caicai920/p/16527263.html