inputStream 流转MultipartFile

InputStream inputStream = null;
MultipartFile multipartFile = null;
try {
    inputStream = minIoService.fileDownload(fileUrl);
} catch (Exception e) {
    log.error("读取文件异常！");
    throw new Exception("读取文件异常！");
}
if (inputStream == null) {
    continue;
}

multipartFile = FileUtil.toMultipartFile(inputStream, fileName, fileContentType);
JSONObject jsonObject = fileUpload1(multipartFile, orderNum,fileName);
Map<String, String> result = (Map<String, String>) jsonObject.get("data");
String url = result.get("url");
String name = result.get("name");
EventBusFile eventBusFile = new EventBusFile();
eventBusFile.setEtFileId(fileinfo.getEtFileId());
eventBusFile.setEventFileName(name);
eventBusFile.setOrderNum(orderNum);
eventBusFile.setEventFilePath(url);
eventBusFile.setUpdateTime(new Date());
eventBusFileMapper.updateById(eventBusFile);
fileNameList.add(name)

public static MultipartFile toMultipartFile(InputStream inputStream,String fileName,String fileContentType) {
    //先将本地文件转化成FileItem
    FileItem fileItem = createFileItem(inputStream,fileName,fileContentType);
    return new CommonsMultipartFile(fileItem);
}

/**
 * 根据filePath将puppeteer截取到的图片转成FileItem
 * @param
 * @return
 */
public static FileItem createFileItem(InputStream inputStream,String fileName,String fileContentType) {
    FileItemFactory factory = new DiskFileItemFactory(16, null);
    FileItem item = factory.createItem(fileName, fileContentType, true, fileName);
    int bytesRead = 0;
    byte[] buffer = new byte[8192];
    try {
        OutputStream os = item.getOutputStream();
        while ((bytesRead = inputStream.read(buffer, 0, 8192)) != -1) {
            os.write(buffer, 0, bytesRead);
        }
        os.close();
        inputStream.close();
    } catch (IOException e) {
        e.printStackTrace();
    }