RestTemple调用接口，上传文件form-data方式_resttemplate设置 form-data

前端调用后台服务上传文件，后端使用restTemple调用接口把文件传到其他服务上去

 @RequestMapping("/test")
    public void upload(MultipartFile file) {
        String originalFilename = file.getOriginalFilename();
        // 生成临时文件
        String tempPath = System.getProperty("java.io.tmpdir");
        File tempFile = new File(tempPath + originalFilename);
        InputStream inputStream = null;
        try {
            if (!tempFile.exists()) {
                inputStream = file.getInputStream();
                Files.copy(inputStream, tempFile.toPath(), new CopyOption[0]);
            }
            FileSystemResource resource = new FileSystemResource(tempFile);
            MultiValueMap<String, Object> multiValueMap = new LinkedMultiValueMap<>();
            multiValueMap.add("file", resource);
            HttpHeaders headers = new HttpHeaders();
            // 设置请求格式form-date格式
            headers.setContentType(MediaType.MULTIPART_FORM_DATA);
            HttpEntity<MultiValueMap<String, Object>> entity = new HttpEntity<>(multiValueMap, headers);
            // 上传文件地址
            String url = "http://";
            //ParameterizedTypeReference 直接返回包装好的对象
            ResponseEntity<String> responseEntity = restTemplate.exchange(url, HttpMethod.POST, entity, new ParameterizedTypeReference<T>() {
            });
            // 调用接口返回结果
            String body = responseEntity.getBody();
            Files.delete(tempFile.toPath());
        } catch (IOException e) {
            log.error("文件流处理失败");
        } finally {
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    log.error("文件流关闭失败");
                }

            }
        }
    }
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40