关于springboot 中使用httpclient或RestTemplate做MultipartFile文件跨服务传输的问题

 @RequestMapping(value = "/remoteCallUpload",method = RequestMethod.POST)
  @ApiOperation("测试远程调用上传")
  public String remoteCallUpload(@RequestParam("file") MultipartFile file){
    System.out.println(file);
    return "成功";
  }

@Configuration
@SuppressWarnings("all")
public class RestTemplateConfig {

  @Autowired
  RestTemplateBuilder builder;

  @Bean
  public RestTemplate restTemplate() {
    return builder.build();
  }
}

ByteArrayResource byteArrayResource = new ByteArrayResource(file.getBytes()) {
      @Override
      public String getFilename() {
        return file.getOriginalFilename();
      }
    };

restTemplate.postForObject(url, files, String.class);

http://192.168.3.7:50003/test/remoteCallUpload

@Autowired
private RestTemplate restTemplate;

private String gettestRestTemplate(MultipartFile file, String url) throws IOException {
    HttpHeaders headers = new HttpHeaders();
    MediaType type = MediaType.parseMediaType("multipart/form-data");
    headers.setContentType(type);
    MultiValueMap<String, Object> form = new LinkedMultiValueMap<>();
    ByteArrayResource byteArrayResource = new ByteArrayResource(file.getBytes()) {
      @Override
      public String getFilename() {
        return file.getOriginalFilename();
      }
    };
    form.add("file", byteArrayResource);
    form.add("filename", file.getOriginalFilename());
    //用HttpEntity封装整个请求报文
    HttpEntity<MultiValueMap<String, Object>> files = new HttpEntity<>(form, headers);

    String flag = restTemplate.postForObject(url, files, String.class);

    return flag;
  }

 <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpclient</artifactId>
      <version>4.5.6</version>
    </dependency>
    <dependency>
      <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpmime</artifactId>
      <version>4.5.6</version>
    </dependency>

@SneakyThrows
  private String gettesthttpclient(MultipartFile file, String url) {
    CloseableHttpClient httpclient = HttpClients.createDefault();
    RequestConfig requestConfig = RequestConfig.custom()
        .setConnectionRequestTimeout(10000)
        .setConnectTimeout(5000)
        .build();
    HttpPost httpPost = new HttpPost(url);
    MultipartEntityBuilder entityBuilder = MultipartEntityBuilder.create();
    // 解决中文文件名乱码问题
    entityBuilder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
    entityBuilder.setCharset(Consts.UTF_8);
    ContentType contentType = ContentType.create(ContentType.TEXT_PLAIN.getMimeType(), Consts.UTF_8);
    entityBuilder.addBinaryBody("file", file.getInputStream(), ContentType.DEFAULT_BINARY, file.getOriginalFilename());
    httpPost.setEntity(entityBuilder.build());
    httpPost.setConfig(requestConfig);
    HttpResponse execute = httpclient.execute(httpPost);
    String flag = EntityUtils.toString(execute.getEntity());
    return flag;
  }