简介

• 对象存储服务OSS（Object Storage Service）是一种海量、安全、低成本、高可靠的云存储服务，适合存放任意类型的文件。容量和处理能力弹性扩展，多种存储类型供选择，全面优化存储成本，今天我这里主要讲解SpringBoot如何集成MinIO。

引入依赖

<!--minio-->
        <dependency>
            <groupId>io.minio</groupId>
            <artifactId>minio</artifactId>
            <version>8.0.3</version>
        </dependency> 

yml文件配置

spring:
  # 配置文件上传大小限制
  servlet:
    multipart:
      max-file-size: 200MB
      max-request-size: 200MB
minio:
  endpoint: http://127.0.0.1:9000
  accessKey: minioadmin
  secretKey: minioadmin
  bucketName: test 

编写配置类

@Data
@Component
public class MinIoClientConfig {
    @Value("${minio.endpoint}")
    private String endpoint;
    @Value("${minio.accessKey}")
    private String accessKey;
    @Value("${minio.secretKey}")
    private String secretKey;
 
    /**
     * 注入minio 客户端
     * @return
     */
    @Bean
    public MinioClient minioClient(){
 
        return MinioClient.builder()
                .endpoint(endpoint)
                .credentials(accessKey, secretKey)
                .build();
    }
 
} 

编写工具类

@Data
public class ObjectItem {
    private String objectName;
    private Long size;
}

/**
 * @description:
 */
@Component
@Slf4j
@RequiredArgsConstructor
public class MinioUtil {
    final MinIoClientConfig prop;

    final MinioClient minioClient;

    /**
     * 查看存储bucket是否存在
     * @return boolean
     */
    public Boolean bucketExists(String bucketName) {
        Boolean found;
        try {
            found = minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return found;
    }

    /**
     * 创建存储bucket
     * @return Boolean
     */
    public Boolean makeBucket(String bucketName) {
        try {
            minioClient.makeBucket(MakeBucketArgs.builder()
                    .bucket(bucketName)
                    .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }
    /**
     * 删除存储bucket
     * @return Boolean
     */
    public Boolean removeBucket(String bucketName) {
        try {
            minioClient.removeBucket(RemoveBucketArgs.builder()
                    .bucket(bucketName)
                    .build());
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }
    /**
     * 获取全部bucket
     */
    public List<Bucket> getAllBuckets() {
        try {
            List<Bucket> buckets = minioClient.listBuckets();
            return buckets;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 文件上传
     *
     * @param file 文件
     * @return Boolean
     */
    public String upload(MultipartFile file) {
        String originalFilename = file.getOriginalFilename();
        if (StringUtils.isBlank(originalFilename)){
            throw new RuntimeException();
        }
        String fileName = UuidUtils.generateUuid() + originalFilename.substring(originalFilename.lastIndexOf("."));
        String objectName = DateUtils.getDayStr() + "/" + fileName;
        try {
            PutObjectArgs objectArgs = PutObjectArgs.builder().bucket(prop.getBucketName()).object(objectName)
                    .stream(file.getInputStream(), file.getSize(), -1).contentType(file.getContentType()).build();
            //文件名称相同会覆盖
            minioClient.putObject(objectArgs);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return objectName;
    }

    /**
     * 预览
     * @param fileName
     * @return
     */
    public String preview(String fileName){
        // 查看文件地址
        GetPresignedObjectUrlArgs build = new GetPresignedObjectUrlArgs().builder().bucket(prop.getBucketName()).object(fileName).method(Method.GET).build();
        try {
            String url = minioClient.getPresignedObjectUrl(build);
            return url;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 文件下载
     * @param fileName 文件名称
     * @param res response
     * @return Boolean
     */
    public void download(String fileName, HttpServletResponse res) {
        GetObjectArgs objectArgs = GetObjectArgs.builder().bucket(prop.getBucketName())
                .object(fileName).build();
        try (GetObjectResponse response = minioClient.getObject(objectArgs)){
            byte[] buf = new byte[1024];
            int len;
            try (FastByteArrayOutputStream os = new FastByteArrayOutputStream()){
                while ((len=response.read(buf))!=-1){
                    os.write(buf,0,len);
                }
                os.flush();
                byte[] bytes = os.toByteArray();
                res.setCharacterEncoding("utf-8");
                // 设置强制下载不打开
                // res.setContentType("application/force-download");
                res.addHeader("Content-Disposition", "attachment;fileName=" + fileName);
                try (ServletOutputStream stream = res.getOutputStream()){
                    stream.write(bytes);
                    stream.flush();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 查看文件对象
     * @return 存储bucket内文件对象信息
     */
    public List<Item> listObjects() {
        Iterable<Result<Item>> results = minioClient.listObjects(
                ListObjectsArgs.builder().bucket(prop.getBucketName()).build());
        List<Item> items = new ArrayList<>();
        try {
            for (Result<Item> result : results) {
                items.add(result.get());
            }
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return items;
    }

    /**
     * 删除
     * @param fileName
     * @return
     * @throws Exception
     */
    public boolean remove(String fileName){
        try {
            minioClient.removeObject( RemoveObjectArgs.builder().bucket(prop.getBucketName()).object(fileName).build());
        }catch (Exception e){
            return false;
        }
        return true;
    }
} 

编写控制器

@RestController
@RequestMapping("/minio")
@Api(tags = "minio测试")
@RequiredArgsConstructor
@Slf4j
public class MinioController {
    @Autowired
    private MinIoUtil minIoUtil;
    @Autowired
    private MinioUtilS minioUtilS;
    @Value("${minio.endpoint}")
    private String address;
    @Value("${minio.bucketName}")
    private String bucketName;
 
    @PostMapping("/upload")
    public Object upload(MultipartFile file) {
        
        List<String> upload = minioUtilS.upload(new MultipartFile[]{file});
 
        return address+"/"+bucketName+"/"+upload.get(0);
    }
 
} 

总结

• springboot 集成 minio 非常简单，通过封装 minioclient，可增加代码的灵活性可扩展性，隔离底层存储接口，后续入要更换其他的存储，经过简单的适配即可实现，通过REST提供存储的基础能力接口，可非常简单的被使用。

声明

• 原文链接：https://www.jianshu.com/p/6de1acde167d