SpringBoot+MinIO实现文件上传、读取、下载、删除的使用示例

<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.16</version>
</dependency>
<!-- SpringBoot Web容器 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>io.minio</groupId>
    <artifactId>minio</artifactId>
    <version>8.3.4</version>
</dependency>

#?设置单个文件大小
spring.servlet.multipart.max-file-size=?50MB
#minio文件服务器配置
s3.url=http://localhost:9000
s3.accessKey=admin
s3.secretKey=admin123
s3.bucketName=test

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
/**
 * @Author yang
 * @Date 2023/1/3 14:00
 * @Version 1.0
 */
@Data
@Component
@ConfigurationProperties(prefix = "s3")
public class StorageProperty {
    private String url;
    private String accessKey;
    private String secretKey;
//    private long callTimeOut = 60000;
//    private long readTimeOut = 300000;
}

import io.minio.BucketExistsArgs;
import io.minio.MinioClient;
import io.minio.messages.Bucket;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import java.util.List;
/**
 * @Author yang
 * @Date 2023/1/3 14:03
 * @Version 1.0
 */
@Slf4j
@Component
@Configuration
public class MinioClientConfig {
    @Autowired
    private StorageProperty storageProperty;
    private static MinioClient minioClient;
    /**
     * @description: 获取minioClient
     * @date 2021/6/22 16:55
     * @return io.minio.MinioClient
     */
    public static MinioClient getMinioClient(){
        return minioClient;
    }
    /**
     * 判断 bucket是否存在
     *
     * @param bucketName:
     *            桶名
     * @return: boolean
     * @date : 2020/8/16 20:53
     */
    @SneakyThrows(Exception.class)
    public static boolean bucketExists(String bucketName) {
        return minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
    }
    /**
     * 获取全部bucket
     *
     * @param :
     * @return: java.util.List<io.minio.messages.Bucket>
     * @date : 2020/8/16 23:28
     */
    @SneakyThrows(Exception.class)
    public static List<Bucket> getAllBuckets() {
        return minioClient.listBuckets();
    }
    /**
     * 初始化minio配置
     *
     * @param :
     * @return: void
     * @date : 2020/8/16 20:56
     */
    @PostConstruct
    public void init() {
        try {
            minioClient = MinioClient.builder()
                    .endpoint(storageProperty.getUrl())
                    .credentials(storageProperty.getAccessKey(), storageProperty.getSecretKey())
                    .build();
        } catch (Exception e) {
            e.printStackTrace();
            log.error("初始化minio配置异常: 【{}】", e.fillInStackTrace());
        }
    }
}

/**
 * @Author yangb
 * @Date 2022/11/27 15:55
 * @Version 1.0
 */
@RestController
@RequestMapping("/minio")
public class MinIoController extends BaseController {
    MinioUtil minioUtil = new MinioUtil();
    /**
     * 上传文件
     * @param file
     * @return
     */
    @PostMapping("/uploadFile")
    public AjaxResult uploadFile(@RequestBody MultipartFile file) {
        MinioClient minioClient = MinioClientConfig.getMinioClient();
        if (minioClient == null) {
            return AjaxResult.error("连接MinIO服务器失败", null);
        }
        ResultEntity<Map<String, Object>> result = minioUtil.minioUpload(file, "", "data-enpower");
        if (result.getCode() == 0) {
            return AjaxResult.success("上传成功");
        } else {
            return AjaxResult.error("上传错误！！！");
        }
    }
    /**
     * 获取文件预览地址
     * @param fileName
     * @return
     */
    @RequestMapping("/getRedFile")
    public AjaxResult getRedFile(@RequestBody String fileName) {
        MinioClient minioClient = MinioClientConfig.getMinioClient();
        if (minioClient == null) {
            return AjaxResult.error("连接MinIO服务器失败", null);
        }
        String url = minioUtil.getPreviewFileUrl("data-enpower",fileName);
        return AjaxResult.success(url);
    }
    /**
     * 下载文件
     * @param fileName
     * @param response
     * @return
     */
    @RequestMapping("/downloadFile")
    public String downloadFile(@RequestParam String fileName, HttpServletResponse response) {
        MinioClient minioClient = MinioClientConfig.getMinioClient();
        if (minioClient == null) {
            return "连接MinIO服务器失败";
        }
        return minioUtil.downloadFile("data-enpower",fileName,response) != null ? "下载成功" : "下载失败";
    }
    /**
     * 删除文件
     *
     * @param fileName 文件路径
     * @return
     */
    @PostMapping("/deleteFile")
    public String deleteFile(String fileName) {
        MinioClient minioClient = MinioClientConfig.getMinioClient();
        if (minioClient == null) {
            return "连接MinIO服务器失败";
        }
        boolean flag = minioUtil.deleteFile("data-enpower",fileName);
        return flag == true ? "删除成功" : "删除失败";
    }
}