springboot Minio功能实现

1.导入Minio相关依赖

<dependency>
  <groupId>io.minio</groupId>
    <artifactId>minio</artifactId>
       <version>8.4.4</version>
          <exclusions>
            <exclusion>
              <groupId>com.squareup.okhttp3</groupId>
                <artifactId>okhttp</artifactId>
             </exclusion>
          </exclusions>
</dependency>
<dependency>
   <groupId>com.squareup.okhttp3</groupId>
      <artifactId>okhttp</artifactId>
        <version>4.10.0</version>
</dependency>

2.application.yml 配置信息

spring:
# 文件上传
  servlet:
    multipart:
      # 单个文件大小
      max-file-size: 500MB
      # 设置总上传的文件大小
      max-request-size: 1000MB


# MinIO配置
minio:
  # 服务地址
  endpoint: http://localhost:9000
  # 文件地址
  fileHost: http://localhost:9000
  # 存储桶名称
  bucket: files
  # 用户名
  access-key: minioadmin
  # 密码
  secret-key: minioadmin

3.MinIO配置类

import io.minio.MinioClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * MinIO配置类
 *
 * @date 2023/6/28
 */
@Configuration
public class MinioConfig {
    private MinioProperties minioProperties;

    @Autowired
    public void setMinioProperties(MinioProperties minioProperties) {
        this.minioProperties = minioProperties;
    }

    /**
     * 初始化客户端
     * @return 客户端
     */
    @Bean
    public MinioClient minioClient() {
        return MinioClient.builder()
                .endpoint(minioProperties.getEndpoint())
                .credentials(minioProperties.getAccessKey(), minioProperties.getSecretKey())
                .build();
    }
}

4.Minio实体类

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

/**
 * @date 2023/6/28
 */
@Configuration
@ConfigurationProperties("minio")
public class Minio {
    /**
     * 服务地址
     */
    private String endpoint;

    /**
     * 文件预览地址
     */
    private String preview;

    /**
     * 存储桶名称
     */
    private String bucket;

    /**
     * 用户名
     */
    private String accessKey;

    /**
     * 密码
     */
    private String secretKey;

    public String getEndpoint() {
        return endpoint;
    }

    public void setEndpoint(String endpoint) {
        this.endpoint = endpoint;
    }

    public String getPreview() {
        return preview;
    }

    public void setPreview(String preview) {
        this.preview = preview;
    }

    public String getBucket() {
        return bucket;
    }

    public void setBucket(String bucket) {
        this.bucket = bucket;
    }

    public String getAccessKey() {
        return accessKey;
    }

    public void setAccessKey(String accessKey) {
        this.accessKey = accessKey;
    }

    public String getSecretKey() {
        return secretKey;
    }

    public void setSecretKey(String secretKey) {
        this.secretKey = secretKey;
    }
}

5.Minio工具类

import io.minio.*;
import io.minio.http.Method;
import io.minio.messages.Bucket;
import io.minio.messages.Item;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.http.MediaTypeFactory;
import org.springframework.stereotype.Component;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

/**
 * MinIO实现类
 *
 * @date 2023/6/28
 */
@Slf4j
@Component
public class MinioUtil {
    private static MinioClient minioClient;

    /**
     * setter注入
     *
     * @param minioClient 客户端
     */
    @Autowired
    public void setMinioClient(MinioClient minioClient) {
        MinioUtil.minioClient = minioClient;
    }

    /**
     * 启动SpringBoot容器的时候初始化Bucket，如果没有Bucket则创建
     */
    public static void createBucket(String bucketName) throws Exception {
        if (!bucketExists(bucketName)) {
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(bucketName).build());
        }
    }

    /**
     * 判断Bucket是否存在
     *
     * @return true：存在，false：不存在
     */
    public static boolean bucketExists(String bucketName) throws Exception {
        return minioClient.bucketExists(BucketExistsArgs.builder().bucket(bucketName).build());
    }

    /**
     * 获得Bucket策略
     *
     * @param bucketName 存储桶名称
     * @return Bucket策略
     */
    public static String getBucketPolicy(String bucketName) throws Exception {
        return minioClient.getBucketPolicy(GetBucketPolicyArgs.builder().bucket(bucketName).build());
    }

    /**
     * 获得所有Bucket列表
     *
     * @return Bucket列表
     */
    public static List<Bucket> getAllBuckets(MinioClient minioClient) throws Exception {
        return minioClient.listBuckets();
    }

    /**
     * 根据存储桶名称获取其相关信息
     *
     * @param bucketName 存储桶名称
     * @return 相关信息
     */
    public static Optional<Bucket> getBucket(String bucketName) throws Exception {
        return getAllBuckets(minioClient)
                .stream()
                .filter(b -> b.name().equals(bucketName))
                .findFirst();
    }

    /**
     * 根据存储桶名称删除Bucket，true：删除成功；false：删除失败，文件或已不存在
     *
     * @param bucketName 存储桶名称
     */
    public static void removeBucket(String bucketName) throws Exception {
        minioClient.removeBucket(RemoveBucketArgs.builder().bucket(bucketName).build());
    }

    /**
     * 判断文件是否存在
     *
     * @param bucketName 存储桶名称
     * @param objectName 文件名
     * @return true：存在；false：不存在
     */
    public static boolean isObjectExist(String bucketName, String objectName) {
        boolean exist = true;
        try {
            minioClient.statObject(StatObjectArgs.builder().bucket(bucketName).object(objectName).build());
        } catch (Exception e) {
            exist = false;
        }
        return exist;
    }

    /**
     * 判断文件夹是否存在
     *
     * @param bucketName 存储桶名称
     * @param objectName 文件夹名称
     * @return true：存在；false：不存在
     */
    public static boolean isFolderExist(String bucketName, String objectName) {
        boolean exist = false;
        try {
            ListObjectsArgs listObjectsArgs = ListObjectsArgs.builder()
                    .bucket(bucketName)
                    .prefix(objectName)
                    .recursive(false)
                    .build();
            Iterable<Result<Item>> results = minioClient.listObjects(listObjectsArgs);
            for (Result<Item> result : results) {
                Item item = result.get();
                if (item.isDir() && objectName.equals(item.objectName())) {
                    exist = true;
                }
            }
        } catch (Exception e) {
            exist = false;
        }
        return exist;
    }

    /**
     * 根据文件前缀查询文件
     *
     * @param bucketName 存储桶名称
     * @param prefix     前缀
     * @param recursive  是否使用递归查询
     * @return MinioItem列表
     */
    public static List<Item> getAllObjectsByPrefix(String bucketName, String prefix, boolean recursive) throws Exception {
        List<Item> list = new ArrayList<>();
        ListObjectsArgs listObjectsArgs = ListObjectsArgs.builder()
                .bucket(bucketName)
                .prefix(prefix)
                .recursive(recursive)
                .build();
        Iterable<Result<Item>> objectsIterator = minioClient.listObjects(listObjectsArgs);
        if (objectsIterator != null) {
            for (Result<Item> o : objectsIterator) {
                Item item = o.get();
                list.add(item);
            }
        }
        return list;
    }

    /**
     * 获取文件流
     *
     * @param bucketName 存储桶名称
     * @param objectName 文件名
     * @return 二进制流
     */
    public static InputStream getObject(String bucketName, String objectName) throws Exception {
        GetObjectArgs getObjectArgs = GetObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .build();
        return minioClient.getObject(getObjectArgs);
    }

    /**
     * 断点下载
     *
     * @param bucketName 存储桶名称
     * @param objectName 文件名称
     * @param offset     起始字节的位置
     * @param length     要读取的长度
     * @return 二进制流
     */
    public InputStream getObject(String bucketName, String objectName, long offset, long length) throws Exception {
        GetObjectArgs getObjectArgs = GetObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .offset(offset)
                .length(length)
                .build();
        return minioClient.getObject(getObjectArgs);
    }

    /**
     * 获取路径下文件列表
     *
     * @param bucketName 存储桶名称
     * @param prefix     文件名称
     * @param recursive  是否递归查找，false：模拟文件夹结构查找
     * @return 二进制流
     */
    public static Iterable<Result<Item>> listObjects(String bucketName, String prefix, boolean recursive) {
        ListObjectsArgs listObjectsArgs = ListObjectsArgs.builder()
                .bucket(bucketName)
                .prefix(prefix)
                .recursive(recursive)
                .build();
        return minioClient.listObjects(listObjectsArgs);
    }

    /**
     * 使用MultipartFile进行文件上传
     *
     * @param bucketName  存储桶名称
     * @param file        文件名
     * @param objectName  对象名
     * @return ObjectWriteResponse对象
     */
    public static ObjectWriteResponse uploadFile(String bucketName, MultipartFile file, String objectName) throws Exception {
        InputStream inputStream = file.getInputStream();
        Optional<MediaType> optional = MediaTypeFactory.getMediaType(objectName);
        String mediaType = optional.orElseThrow(() -> new RuntimeException("文件类型暂不支持")).toString();
        PutObjectArgs putObjectArgs = PutObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .contentType(mediaType)
                .stream(inputStream, inputStream.available(), -1)
                .build();
        return minioClient.putObject(putObjectArgs);
    }

    /**
     * 上传本地文件
     *
     * @param bucketName 存储桶名称
     * @param objectName 对象名称
     * @param fileName   本地文件路径
     */
    public static ObjectWriteResponse uploadFile(String bucketName, String objectName, String fileName) throws Exception {
        UploadObjectArgs uploadObjectArgs = UploadObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .filename(fileName)
                .build();
        return minioClient.uploadObject(uploadObjectArgs);
    }

    /**
     * 通过流上传文件
     *
     * @param bucketName  存储桶名称
     * @param objectName  文件对象
     * @param inputStream 文件流
     */
    public static ObjectWriteResponse uploadFile(String bucketName, String objectName, InputStream inputStream) throws Exception {
        PutObjectArgs putObjectArgs = PutObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .stream(inputStream, inputStream.available(), -1)
                .build();
        return minioClient.putObject(putObjectArgs);
    }

    /**
     * 创建文件夹或目录
     *
     * @param bucketName 存储桶名称
     * @param objectName 目录路径
     */
    public static ObjectWriteResponse createDir(String bucketName, String objectName) throws Exception {
        PutObjectArgs putObjectArgs = PutObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .stream(new ByteArrayInputStream(new byte[]{}), 0, -1)
                .build();
        return minioClient.putObject(putObjectArgs);
    }

    /**
     * 获取文件信息, 如果抛出异常则说明文件不存在
     *
     * @param bucketName 存储桶名称
     * @param objectName 文件名称
     */
    public static String getFileStatusInfo(String bucketName, String objectName) throws Exception {
        StatObjectArgs statObjectArgs = StatObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .build();
        return minioClient.statObject(statObjectArgs).toString();
    }

    /**
     * 拷贝文件
     *
     * @param bucketName    存储桶名称
     * @param objectName    文件名
     * @param srcBucketName 目标存储桶
     * @param srcObjectName 目标文件名
     */
    public static ObjectWriteResponse copyFile(String bucketName, String objectName, String srcBucketName, String srcObjectName) throws Exception {
        return minioClient.copyObject(CopyObjectArgs.builder()
                .source(CopySource.builder()
                        .bucket(bucketName)
                        .object(objectName).build())
                .bucket(srcBucketName)
                .object(srcObjectName).build());
    }

    /**
     * 删除文件
     *
     * @param bucketName 存储桶名称
     * @param objectName 文件名称
     */
    public static void removeFile(String bucketName, String objectName) throws Exception {
        RemoveObjectArgs removeObjectArgs = RemoveObjectArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .build();
        minioClient.removeObject(removeObjectArgs);
    }

    /**
     * 批量删除文件
     *
     * @param bucketName 存储桶名称
     * @param keys       需要删除的文件列表
     */
    public static void removeFiles(String bucketName, List<String> keys) {
        keys.forEach(key -> {
            try {
                removeFile(bucketName, key);
            } catch (Exception e) {
                log.error("批量删除失败！error:{0}", e);
            }
        });
    }

    /**
     * 获取文件外链
     *
     * @param bucketName 存储桶名称
     * @param objectName 文件名
     * @param expires    过期时间 <=7 秒 （外链有效时间（单位：秒））
     * @return 文件外链
     */
    public static String getPreSignedObjectUrl(String bucketName, String objectName, Integer expires) throws Exception {
        GetPresignedObjectUrlArgs args = GetPresignedObjectUrlArgs.builder()
                .expiry(expires)
                .bucket(bucketName)
                .object(objectName)
                .build();
        return minioClient.getPresignedObjectUrl(args);
    }

    /**
     * 获得文件外链
     *
     * @param bucketName 存储桶名称
     * @param objectName 文件名
     * @return 文件外链
     */
    public static String getPreSignedObjectUrl(String bucketName, String objectName) throws Exception {
        GetPresignedObjectUrlArgs args = GetPresignedObjectUrlArgs.builder()
                .bucket(bucketName)
                .object(objectName)
                .method(Method.GET)
                .build();
        return minioClient.getPresignedObjectUrl(args);
    }

    /**
     * 将URLDecoder编码转成UTF8
     *
     * @param str 字符串
     * @return 编码
     */
    public static String getUtf8ByDecoder(String str) throws UnsupportedEncodingException {
        String url = str.replaceAll("%(?![0-9a-fA-F]{2})", "%25");
        return URLDecoder.decode(url, "UTF-8");
    }
}

6.Minio控制类

import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Arrays;

@RestController
@RequestMapping("/minio")
@CrossOrigin
public class MinioController {
    @Autowired
    private Minio minio;

    @Autowired
    private MinioUtil minioService;


    /**
     * 上传文件
     */
    @PostMapping(value = "/upload")
    public String upload(@RequestParam(name = "file") MultipartFile multipartFile) throws Exception {
        String fileName = multipartFile.getOriginalFilename();
        minioService.createBucket(minio.getBucket());
        minioService.uploadFile(minio.getBucket(), multipartFile, fileName);
        return minioService.getPreSignedObjectUrl(minio.getBucket(), fileName);
    }

    /**
     * 下载文件
     */
    @GetMapping(value = "/download")
    public ResponseEntity<byte[]> download(@RequestParam(name = "fileName") String fileName) {
        ResponseEntity<byte[]> responseEntity = null;
        ByteArrayOutputStream out = null;
        InputStream in = null;
        try{
            out = new ByteArrayOutputStream();
            in = minioService.getObject(minio.getBucket(),fileName);
            IOUtils.copy(in, out);
            //封装返回值
            byte[] bytes = out.toByteArray();
            HttpHeaders headers = new HttpHeaders();
            try {
                headers.add("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            headers.setContentLength(bytes.length);
            headers.setContentType(MediaType.MULTIPART_FORM_DATA);
            headers.setAccessControlExposeHeaders(Arrays.asList("*"));
            responseEntity = new ResponseEntity<byte[]>(bytes, headers, HttpStatus.OK);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            try {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return responseEntity;
    }
}