Java file uploading and downloading - use Minio

Minio template class:

@RequiredArgsConstructor
public class MinioTemplate implements InitializingBean {
   private final String endpoint;
   private final String accessKey;
   private final String secretKey;
   private MinioClient client;

   /**
    * 创建bucket
    *
    * @param bucketName bucket名称
    */
   @SneakyThrows
   public void createBucket(String bucketName) {
      if (!client.bucketExists(bucketName)) {
         client.makeBucket(bucketName);
      }
   }

   /**
    * 获取全部bucket
    * <p>
    * https://docs.minio.io/cn/java-client-api-reference.html#listBuckets
    */
   @SneakyThrows
   List public <Bucket> getAllBuckets () { 
      return client.listBuckets (); 
   } 

   / ** 
    * The information acquired bucketName 
    * @param bucketName bucket name 
    * / 
   @SneakyThrows 
   public Optional The <Bucket> getBucket (String bucketName) { 
      return client.listBuckets .. () .stream () filter (. B -> b.name () the equals (bucketName)) the findFirst (); 
   } 

   / ** 
    * The deletion information bucketName 
    * @param bucketName bucket name 
    * / 
   @SneakyThrows 
   public void removeBucket (String bucketName) { 
      client.removeBucket (bucketName); 
   } 

   / ** 
    * query file according to the file pre 
    * 
    * @param bucketName bucket name
    * @param prefix     前缀
    * @param recursive  是否递归查询
    * @return MinioItem 列表
    */
   @SneakyThrows
   public List<MinioItem> getAllObjectsByPrefix(String bucketName, String prefix, boolean recursive) {
      List<MinioItem> objectList = new ArrayList<>();
      Iterable<Result<Item>> objectsIterator = client
            .listObjects(bucketName, prefix, recursive);

      while (objectsIterator.iterator().hasNext()) {
         objectList.add(new MinioItem(objectsIterator.iterator().next().get()));
      }
      return objectList;
   }

   /**
    * 获取文件外链
    *
    * @param bucketName bucket名称
    * @Param objectName file name 
    * @param expires expiration time <=. 7 
    * @return URL 
    * / 
   @SneakyThrows 
   public getObjectURL String (String bucketName, objectName String, Integer Expires) { 
      return client.presignedGetObject (bucketName, objectName, Expires); 
   } 

   / ** 
    * Get file 
    * 
    * @param bucketName bucket name 
    * @param objectName file name 
    * @return binary stream 
    * / 
   @SneakyThrows 
   public the InputStream the getObject (bucketName String, String objectName) { 
      return client.getObject (bucketName, objectName); 
   } 

   / ** 
    * Upload file 
    *
    * @Param bucketName bucket Name 
    * @param objectName file name 
    * @param stream stream file 
    * @throws Exception https://docs.minio.io/cn/java-client-api-reference.html#putObject 
    * / 
   public void putObject (bucketName String, String objectName, the InputStream Stream) throws Exception { 
      client.putObject (bucketName, objectName, Stream, stream.available (), "file application / OCTET-Stream"); 
   } 

   / ** 
    * upload 
    * 
    * @param bucketName bucket name 
    * @param objectName file name 
    * @param stream file stream 
    * @param size size 
    * @param contextType type
    * @throws Exception https://docs.minio.io/cn/java-client-api-reference.html#putObject
    */
   public void putObject(String bucketName, String objectName, InputStream stream, long size, String contextType) throws Exception {
      client.putObject(bucketName, objectName, stream, size, contextType);
   }

   /**
    * 获取文件信息
    *
    * @param bucketName bucket名称
    * @param objectName 文件名称
    * @throws Exception https://docs.minio.io/cn/java-client-api-reference.html#statObject
    */
   public ObjectStat getObjectInfo(String bucketName, String objectName) throws Exception {
      return client.statObject(bucketName, objectName);
   }

   /**
    * Delete files 
    * 
    * @param bucketName bucket Name 
    * @param objectName file name 
    * @throws Exception https://docs.minio.io/cn/java-client-api-reference.html#removeObject 
    * / 
   public void removeObject (String bucketName, String objectName) throws Exception { 
      client.removeObject (bucketName, objectName); 
   } 

   @Override 
   public void afterPropertiesSet () throws Exception { 
      Assert.hasText (Endpoint, "empty Minio URL"); 
      Assert.hasText (the accessKey, "Minio accessKey empty "); 
      Assert.hasText (secretKey," Minio secretKey empty "); 
      this.client = new new MinioClient (Endpoint, accessKey, secretKey); 
   } 


file Upload method:

public String upload(@RequestParam("file") MultipartFile file) {
    String fileName  = file.getOriginalFilename();
    Map<String, String> resultMap = new HashMap<>(4);
    resultMap.put("bucketName", "bucketName");

    resultMap.put("fileName", fileName);
    try {
        minioTemplate.putObject("bucketName", fileName, file.getInputStream());

　　} catch (Exception e) {

        return "Upload Failed"; 
    } 
    return "Upload successful"; 
} file download method:

public void download(String fileName, HttpServletResponse response, HttpServletRequest request) {
    String userAgent = request.getHeader("User-Agent");
    String[] nameArray = StrUtil.split(fileName, "-");
    try (InputStream inputStream = minioTemplate.getObject(nameArray[0], nameArray[1])) {
        //解决乱码
        if ( //IE 8 至 IE 10
                userAgent.toUpperCase().contains("MSIE") ||
                         //IE 11
                        userAgent.contains("Trident/7.0")) {
            fileName = java.net.URLEncoder.encode(nameArray[1], "UTF-8");
        } else{
            fileName = new String(nameArray[1].getBytes("UTF-8"),"iso-8859-1");
        }
        response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
        response.setContentType("application/force-download");
        response.setCharacterEncoding("UTF-8");
        IoUtil.copy(inputStream, response.getOutputStream());
    } catch (Exception e) {
        log.error("文件读取异常", e);
    }
}