一、使用docker部署minio

1、拉取镜像

docker pull minio/minio

2、创建目录

mkdir -p /home/minio/config
mkdir -p /home/minio/data

3、创建Minio容器并运行

docker run -p 9000:9000 -p 9090:9090 \
     --net=host \
     --name minio \
     -d --restart=always \
     -e "MINIO_ACCESS_KEY=minioadmin" \
     -e "MINIO_SECRET_KEY=minioadmin" \
     -v /home/minio/data:/data \
     -v /home/minio/config:/root/.minio \
     minio/minio server \
     /data --console-address ":9090" -address ":9000"

4、登录minio控制台

5、创建buckets存储桶测试

创建一个名为public的存储桶（名字可自定义），上传文件。

通过http://ip:9000/存储桶名/文件名访问文件

若出现：

可以将存储桶的访问权限设置为public.

二、SpringBoot整合minio

1、创建minio-demo项目

2、引入pom依赖

<dependency>
    <groupId>io.minio</groupId>
    <artifactId>minio</artifactId>
    <version>7.0.2</version>
</dependency>

3、编写配置文件

在application.yml文件中编写相关配置。

server:
  port: 8081
spring:
  # 配置文件上传大小限制
  servlet:
    multipart:
      max-file-size: 200MB
      max-request-size: 200MB
minio:
  host: http://127.0.0.1:9000
  url: ${minio.host}/${minio.bucket}/
  access-key: minioadmin
  secret-key: minioadmin
  bucket: public

4、编写MinioConfig配置类

import io.minio.MinioClient;
import io.minio.ObjectStat;
import io.minio.PutObjectOptions;
import io.minio.Result;
import io.minio.messages.Bucket;
import io.minio.messages.Item;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.util.UriUtils;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;

@Component
public class MinioConfig implements InitializingBean {

    @Value(value = "${minio.bucket}")
    private String bucket;

    @Value(value = "${minio.host}")
    private String host;

    @Value(value = "${minio.url}")
    private String url;

    @Value(value = "${minio.access-key}")
    private String accessKey;

    @Value(value = "${minio.secret-key}")
    private String secretKey;

    private MinioClient minioClient;

    @Override
    public void afterPropertiesSet() throws Exception {
        Assert.hasText(url, "Minio url 为空");
        Assert.hasText(accessKey, "Minio accessKey为空");
        Assert.hasText(secretKey, "Minio secretKey为空");
        this.minioClient = new MinioClient(this.host, this.accessKey, this.secretKey);
    }

    /**
     * 上传
     */
    public String putObject(MultipartFile multipartFile) throws Exception {
        // bucket 不存在，创建
        if (!minioClient.bucketExists(this.bucket)) {
            minioClient.makeBucket(this.bucket);
        }
        try (InputStream inputStream = multipartFile.getInputStream()) {
            // 上传文件的名称
            String fileName = multipartFile.getOriginalFilename();
            // PutObjectOptions，上传配置(文件大小，内存中文件分片大小)
            PutObjectOptions putObjectOptions = new PutObjectOptions(multipartFile.getSize(), PutObjectOptions.MIN_MULTIPART_SIZE);
            // 文件的ContentType
            putObjectOptions.setContentType(multipartFile.getContentType());
            minioClient.putObject(this.bucket, fileName, inputStream, putObjectOptions);
            // 返回访问路径
            return this.url + UriUtils.encode(fileName, StandardCharsets.UTF_8);
        }
    }

    /**
     * 文件下载
     */
    public void download(String fileName, HttpServletResponse response){
        // 从链接中得到文件名
        InputStream inputStream;
        try {
            MinioClient minioClient = new MinioClient(host, accessKey, secretKey);
            ObjectStat stat = minioClient.statObject(bucket, fileName);
            inputStream = minioClient.getObject(bucket, fileName);
            response.setContentType(stat.contentType());
            response.setCharacterEncoding("UTF-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
            IOUtils.copy(inputStream, response.getOutputStream());
            inputStream.close();
        } catch (Exception e){
            e.printStackTrace();
            System.out.println("有异常：" + e);
        }
    }

    /**
     * 列出所有存储桶名称
     *
     * @return
     * @throws Exception
     */
    public List<String> listBucketNames()
            throws Exception {
        List<Bucket> bucketList = listBuckets();
        List<String> bucketListName = new ArrayList<>();
        for (Bucket bucket : bucketList) {
            bucketListName.add(bucket.name());
        }
        return bucketListName;
    }

    /**
     * 查看所有桶
     *
     * @return
     * @throws Exception
     */
    public List<Bucket> listBuckets()
            throws Exception {
        return minioClient.listBuckets();
    }

    /**
     * 检查存储桶是否存在
     *
     * @param bucketName
     * @return
     * @throws Exception
     */
    public boolean bucketExists(String bucketName) throws Exception {
        boolean flag = minioClient.bucketExists(bucketName);
        if (flag) {
            return true;
        }
        return false;
    }

    /**
     * 创建存储桶
     *
     * @param bucketName
     * @return
     * @throws Exception
     */
    public boolean makeBucket(String bucketName)
            throws Exception {
        boolean flag = bucketExists(bucketName);
        if (!flag) {
            minioClient.makeBucket(bucketName);
            return true;
        } else {
            return false;
        }
    }

    /**
     * 删除桶
     *
     * @param bucketName
     * @return
     * @throws Exception
     */
    public boolean removeBucket(String bucketName)
            throws Exception {
        boolean flag = bucketExists(bucketName);
        if (flag) {
            Iterable<Result<Item>> myObjects = listObjects(bucketName);
            for (Result<Item> result : myObjects) {
                Item item = result.get();
                // 有对象文件，则删除失败
                if (item.size() > 0) {
                    return false;
                }
            }
            // 删除存储桶，注意，只有存储桶为空时才能删除成功。
            minioClient.removeBucket(bucketName);
            flag = bucketExists(bucketName);
            if (!flag) {
                return true;
            }

        }
        return false;
    }

    /**
     * 列出存储桶中的所有对象
     *
     * @param bucketName 存储桶名称
     * @return
     * @throws Exception
     */
    public Iterable<Result<Item>> listObjects(String bucketName) throws Exception {
        boolean flag = bucketExists(bucketName);
        if (flag) {
            return minioClient.listObjects(bucketName);
        }
        return null;
    }

    /**
     * 列出存储桶中的所有对象名称
     *
     * @param bucketName 存储桶名称
     * @return
     * @throws Exception
     */
    public List<String> listObjectNames(String bucketName) throws Exception {
        List<String> listObjectNames = new ArrayList<>();
        boolean flag = bucketExists(bucketName);
        if (flag) {
            Iterable<Result<Item>> myObjects = listObjects(bucketName);
            for (Result<Item> result : myObjects) {
                Item item = result.get();
                listObjectNames.add(item.objectName());
            }
        }
        return listObjectNames;
    }

    /**
     * 删除一个对象
     *
     * @param bucketName 存储桶名称
     * @param objectName 存储桶里的对象名称
     * @throws Exception
     */
    public boolean removeObject(String bucketName, String objectName) throws Exception {
        boolean flag = bucketExists(bucketName);
        if (flag) {
            List<String> objectList = listObjectNames(bucketName);
            for (String s : objectList) {
                if(s.equals(objectName)){
                    minioClient.removeObject(bucketName, objectName);
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 文件访问路径
     *
     * @param bucketName 存储桶名称
     * @param objectName 存储桶里的对象名称
     * @return
     * @throws Exception
     */
    public String getObjectUrl(String bucketName, String objectName) throws Exception {
        boolean flag = bucketExists(bucketName);
        String url = "";
        if (flag) {
            url = minioClient.getObjectUrl(bucketName, objectName);
        }
        return url;
    }

}

5、编写MinioController类

import com.minio.demo.config.MinioConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.util.List;

@RestController
@CrossOrigin
@RequestMapping("/test")
public class MinioController {

    @Autowired
    MinioConfig minioConfig;

    // 上传
    @PostMapping("/upload")
    public Object upload(@RequestParam("file") MultipartFile multipartFile) throws Exception {
        return this.minioConfig.putObject(multipartFile);
    }

    // 下载文件
    @GetMapping("/download")
    public void download(@RequestParam("fileName")String fileName, HttpServletResponse response) {
        this.minioConfig.download(fileName,response);
    }

    // 列出所有存储桶名称
    @PostMapping("/list")
    public List<String> list() throws Exception {
        return this.minioConfig.listBucketNames();
    }

    // 创建存储桶
    @PostMapping("/createBucket")
    public boolean createBucket(String bucketName) throws Exception {
        return this.minioConfig.makeBucket(bucketName);
    }

    // 删除存储桶
    @PostMapping("/deleteBucket")
    public boolean deleteBucket(String bucketName) throws Exception {
        return this.minioConfig.removeBucket(bucketName);
    }

    // 列出存储桶中的所有对象名称
    @PostMapping("/listObjectNames")
    public List<String> listObjectNames(String bucketName) throws Exception {
        return this.minioConfig.listObjectNames(bucketName);
    }

    // 删除一个对象
    @PostMapping("/removeObject")
    public boolean removeObject(String bucketName, String objectName) throws Exception {
        return this.minioConfig.removeObject(bucketName, objectName);
    }

    // 文件访问路径
    @PostMapping("/getObjectUrl")
    public String getObjectUrl(String bucketName, String objectName) throws Exception {
        return this.minioConfig.getObjectUrl(bucketName, objectName);
    }
}

6、测试（上传）

开发中上传接口用得较多，其他接口可自行测试。

三、Vue+Element-ui前端交互

npm下载element-ui

npm install element-ui -S

// 引入ElementUI
import ElementUI from 'element-ui'
import 'element-ui/lib/theme-chalk/index.css'
Vue.use(ElementUI)

<template>
  <div id="app">
    <el-upload
        class="avatar-uploader"
        action="http://127.0.0.1:8081/test/upload"
        :show-file-list="false"
        :on-success="handleAvatarSuccess"
        :before-upload="beforeAvatarUpload">
      <img v-if="imageUrl" :src="imageUrl" class="avatar">
      <i v-else class="el-icon-plus avatar-uploader-icon"></i>
    </el-upload>
  </div>
</template>

<script>
export default {
  data() {
    return {
      imageUrl: ''
    };
  },
  methods: {
    handleAvatarSuccess(res, file) {
      this.imageUrl = URL.createObjectURL(file.raw);
    },
    beforeAvatarUpload(file) {
      const isJPG = file.type === 'image/jpeg' || file.type === 'image/png';
      const isLt2M = file.size / 1024 / 1024 < 2;
      if (!isJPG) {
        this.$message.error('上传头像图片只能是 jpg或png 格式!');
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 2MB!');
      }
      return isJPG && isLt2M;
    }
  }
}
</script>

<style lang="less">
.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  left: 200px;
  top: 120px;
  overflow: hidden;
}
.avatar-uploader .el-upload:hover {
  border-color: #409EFF;
}
.avatar-uploader-icon {
  position: relative;
  top: 80px;
  font-size: 28px;
  color: #8c939d;
  width: 389px;
  height: 204px;
  line-height: 178px;
  text-align: center;
}
.avatar {
  width: 389px;
  height: 204px;
  display: block;
}
</style>