SpringBoot+MinIO implements object storage-javaTutorial-php.cn

1. MinIO

MinIO is an object storage service based on the Apache License v2.0 open source protocol. It is compatible with the Amazon S3 cloud storage service interface and is very suitable for storing large-capacity unstructured data, such as pictures, videos, log files, backup data, container/virtual machine images, etc., and an object file can be of any size, ranging from several Ranges from kb to a maximum of 5T.

MinIO is a very lightweight service that can be easily combined with other applications, such as NodeJS, Redis or MySQL.

2. MinIO installation and startup

Since MinIO is a separate server and needs to be deployed separately, please check the following blog for the use of MinIO on Windows systems.

https://blog.csdn.net/Angel_asp/article/details/128544612

## 3. pom .xml

<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>

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4. applicatin.properties (configuration file)

# 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

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5. Writing Java business classes

The methods involved in minio include: determining whether the bucket exists, creating a bucket, uploading files, reading files, downloading files, deleting files, etc.

1. StorageProperty storage attribute class:

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;
}

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2. minio configuration class:

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());
        }
    }
 
}

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6. MinIoController

File upload, file reading, The file download and file deletion interfaces are as follows:

/**
 * @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";
    }
 
 
}

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七、调试结果

1、文件上传

SpringBoot+MinIO implements object storage

minio上的文件

2、文件下载

3、文件删除

我们在minio上看看文件是否已删除

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