工作需求需要在项目中使用minio，项目使用springboot，如下操作：

• 引入依赖：

<dependency>
            <groupId>io.minio</groupId>
            <artifactId>minio</artifactId>
            <version>8.2.1</version>
</dependency>

• 配置文件

minio:
  minioUrl: http://192.168.56.201:9999/
  accessKey: root
  secretKey: root1234

• 获取配置参数并注入MinioClient 对象

@Data
@Component
@ConfigurationProperties(prefix = "minio")
@Log4j2
public class MinioConfig {
    private String minioUrl;
    private String accessKey;
    private String secretKey;

    @Bean
    public MinioClient getMinioClient(){
        log.info("初始化MinioClient客户端：minioUrl:" + minioUrl + ",accessKey:" + accessKey + ",secretKey:" + secretKey);
        MinioClient minioClient = MinioClient.builder()
                .endpoint(minioUrl)
                .credentials(accessKey,secretKey)
                .build();
        return minioClient;
    }
}

• 在工具类中使用

@Log4j2
@Component
public class FileServerOptUtil {

    @Autowired
    MinioClient minioClient;

    /**
     * 获取桶中某个对象的输入流
     * @param bucketName
     * @param path
     * @return
     */
    public  InputStream getObjectInputStream(String bucketName,String path){
        log.info("从桶：" + bucketName + ",获取：" + path + "对象流！");
        InputStream stream = null;
        try {
            stream = minioClient.getObject(
                            GetObjectArgs.builder().bucket(bucketName).object(path).build());
        } catch (Exception e) {
            log.error("从桶：" + bucketName + ",获取：" + path + "对象流错误！");
            e.printStackTrace();
        }
        return stream;
    }

    /**
     *
     * @param bucketName
     * @param dirPath 如：path/to/
     * @return
     */
    public  boolean mkdir(String bucketName,String dirPath){
        log.info("在桶：" + bucketName + ",中创建：" + dirPath);
        boolean result = false;
        try {
            minioClient.putObject(
                    PutObjectArgs.builder().bucket(bucketName).object(dirPath).stream(
                            new ByteArrayInputStream(new byte[] {}), 0, -1)
                            .build());
            result = true;
        } catch (Exception e) {
            log.error("在桶：" + bucketName + ",中创建：" + dirPath + "错误！");
            e.printStackTrace();
        }
        return result;
    }


    /**
     * 往对象存储服务目标桶的目标位置上传文件
     * @param bucketName 桶
     * @param toPath  目标位置如：test/2.txt
     * @param fromPath 本地文件位置
     * @return
     */
    public  boolean uploadObject(String bucketName,String toPath,String fromPath ){
        log.info("从本地：" + fromPath + "往桶：" + bucketName + ",中上传文件：" + toPath);
        boolean result = false;
        try {
            minioClient.uploadObject(
                    UploadObjectArgs.builder()
                            .bucket(bucketName)
                            .object(toPath)
                            .filename(fromPath)
                            .build());
            result = true;
        } catch (Exception e) {
            log.error("从本地：" + fromPath + "往桶：" + bucketName + ",中上传文件：" + toPath + "错误！");
            e.printStackTrace();
        }
        return result;
    }


    /**
     * 从桶中下载文件到本地文件
     * @param bucketName
     * @param fromPath
     * @param toPath
     * @return
     */
    public  boolean downloadFile(String bucketName,String fromPath,String toPath){
        log.info("从桶：" + bucketName + "中将" + fromPath + "文件下载到：" + toPath);
        boolean result = false;
        try {
            minioClient.downloadObject(
                    DownloadObjectArgs.builder()
                            .bucket(bucketName)
                            .object(fromPath)
                            .filename(toPath)
                            .build());
            result = true;
        } catch (Exception e) {
            log.error("从桶：" + bucketName + "中将" + fromPath + "文件下载到：" + toPath + "错误！");
            e.printStackTrace();
        }
        return result;
    }
}