<!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->

<dependency>

    <groupId>commons-fileupload</groupId>

    <artifactId>commons-fileupload</artifactId>

    <version>1.3.3</version>

</dependency>

InputStream inputStream = getImageStream("http://192.168.111.111:2333/pic?xxxxxxxx");

    /**

     * 获取网络图片流

     *

     * @param url

     * @return

     */

    public static InputStream getImageStream(String url) {

        try {

            HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();

            connection.setReadTimeout(5000);

            connection.setConnectTimeout(5000);

            connection.setRequestMethod("GET");

            if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {

                InputStream inputStream = connection.getInputStream();

                return inputStream;

            }

        } catch (IOException e) {

            System.out.println("获取网络图片出现异常，图片路径为：" + url);

            e.printStackTrace();

        }

        return null;

    }

MultipartFile multipartFile = new MockMultipartFile("xxxx.jpg","xxxx.jpg", MediaType.MULTIPART_FORM_DATA_VALUE, inputStream);

public void testOSSServiceImport(){

    File file = new File("xxxx.jpg");

    DiskFileItem fileItem = (DiskFileItem) new DiskFileItemFactory().createItem("file",

            MediaType.ALL_VALUE, true, file.getName());

    try (InputStream input = new FileInputStream(file); OutputStream os = fileItem.getOutputStream()) {

        IOUtils.copy(input, os);

    } catch (Exception e) {

        throw new IllegalArgumentException("Invalid file: " + e, e);

    }

    MultipartFile multi = new CommonsMultipartFile(fileItem);

}