用springboot整合minio实现多文件批量上传

首先，需要引入minio的依赖：

<dependency>
    <groupId>io.minio</groupId>
    <artifactId>minio</artifactId>
    <version>8.0.2</version>
</dependency>

然后，在application.properties中配置minio的连接信息：

minio.url=http://localhost:9000
minio.accessKey=minioadmin
minio.secretKey=minioadmin
minio.bucketName=test

接着，创建一个MinioService类，用于处理文件上传和下载：

@Service
public class MinioService {
    @Value("${minio.url}")
    private String minioUrl;

    @Value("${minio.accessKey}")
    private String accessKey;

    @Value("${minio.secretKey}")
    private String secretKey;

    @Value("${minio.bucketName}")
    private String bucketName;

    private final MinioClient minioClient = new MinioClient(minioUrl, accessKey, secretKey);

    public void upload(MultipartFile file) throws Exception {
        // 生成文件名
        String originalFilename = file.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));

        // 上传文件
        minioClient.putObject(PutObjectArgs.builder()
                .bucket(bucketName)
                .object(fileName)
                .stream(file.getInputStream(), file.getSize(), -1)
                .contentType(file.getContentType())
                .build());
    }

    public InputStream download(String fileName) throws Exception {
        // 下载文件
        return minioClient.getObject(GetObjectArgs.builder()
                .bucket(bucketName)
                .object(fileName)
                .build());
    }
}

最后，在Controller中使用MinioService处理上传和下载请求：

@RestController
public class MinioController {
    @Autowired
    private MinioService minioService;

    @PostMapping("/upload")
    public String upload(@RequestParam("file") MultipartFile[] files) {
        try {
            for (MultipartFile file : files) {
                minioService.upload(file);
            }
            return "上传成功";
        } catch (Exception e) {
            e.printStackTrace();
            return "上传失败";
        }
    }

    @GetMapping("/download")
    public ResponseEntity<InputStreamResource> download(@RequestParam("fileName") String fileName) {
        try {
            InputStream inputStream = minioService.download(fileName);
            InputStreamResource inputStreamResource = new InputStreamResource(inputStream);
            HttpHeaders headers = new HttpHeaders();
            headers.add("Content-Disposition", "attachment; filename=" + fileName);
            return ResponseEntity.ok().headers(headers).contentLength(inputStream.available())
                    .contentType(MediaType.parseMediaType("application/octet-stream")).body(inputStreamResource);
        } catch (Exception e) {
            e.printStackTrace();
            return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(null);
        }
    }
}

这样，就可以使用Spring Boot和Minio实现多文件批量上传了。