使用Spring Rest模板+ Spring Web MVC分段上传文件

将以下代码修改为使用RestTemplate上传后，分段文件上传工作

linkedMultiValueMap<String, Object> map = new linkedMultiValueMap<>();map.add("file", new ClassPathResource(file));HttpHeaders headers = new HttpHeaders();headers.setContentType(MediaType.MULTIPART_FORM_DATA);HttpEntity<linkedMultiValueMap<String, Object>> requestEntity = new    HttpEntity<linkedMultiValueMap<String, Object>>(         map, headers);ResponseEntity<String> result = template.get().exchange(         contextPath.get() + path, HttpMethod.POST, requestEntity,         String.class);

并将MultipartFilter添加到web.xml

    <filter>        <filter-name>multipartFilter</filter-name>        <filter-class>org.springframework.web.multipart.support.MultipartFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>multipartFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>