minio实现文件上传下载和删除功能

清疚 2023-10-01 07:38 8阅读 0赞

#### 前言 ####

之前用到文件上传功能，在这里做个学习记录。使用minio实现，后面会记录使用fastdfs和阿里云的oss实现文件上传以及他们的比较（oss根据流量收费）。minio的中文文档：https://docs.min.io/cn/

#### minio安装 ####

1.  首先查询docker镜像：  
    docker search minio  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70]
2.  选着stars最高的那个拉取：  
    docker pull minio/minio  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70 1]
3.  启动minio服务器，并设置端口号，容器名，账号和密码：  
    docker run -p 9000:9000 --name minio -e MINIO\_ACCESS\_KEY=tanchuntcc -e MINIO\_SECRET\_KEY=tanchuntcc -v /data:/data minio/minio server /data  
    ![在这里插入图片描述][20200610193752233.png]

#### minio操作 ####

1.  启动成功后，访问你minio的ip地址，这里我docker安装在本机，所以是http://localhost:9000，输入刚刚设置的账号密码。  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70 2]
2.  登陆后右下角可以创建bucket.  
    ![在这里插入图片描述][20200610193822760.png]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70 3]
3.  创建多个bucket后  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70 4]
4.  可以选择编辑和删除  
    ![在这里插入图片描述][20200610193859319.png]
5.  可以点击右下角上传文件  
    ![在这里插入图片描述][20200610193912636.png]
6.  支持各种类型的文件：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70 5]

#### Java客户端 ####

首先创建一个Springboot项目，在resources中的application.yml文件添加如下配置：

server:
      port: 8080
      
    spring:
      servlet:
        multipart:
          enabled: true #开启文件上传
          max-file-size: 500MB
          max-request-size: 500MB
    
    minio:
      endpoint: http://localhost:9000 #Minio服务所在地址
      bucketName: tcc #存储桶名称
      accessKey: tanchuntcc #访问的key
      secretKey: tanchuntcc #访问的秘钥

添加minio的maven依赖：

<dependency>
          <groupId>io.minio</groupId>
          <artifactId>minio</artifactId>
          <version>3.0.10</version>
        </dependency>

controller的代码如下：

@RestController("/minioDemo")
    public class MinioDemoController {
        
    
        private static final Logger LOGGER = LoggerFactory.getLogger(MinioDemoController.class);
    
        @Value("${minio.endpoint}")
        private  String ENDPOINT;
        @Value("${minio.bucketName}")
        private  String BUCKETNAME;
        @Value("${minio.accessKey}")
        private  String ACCESSKEY;
        @Value("${minio.secretKey}")
        private  String SECRETKEY;
    
        //文件创建
        @PostMapping
        public String upload(MultipartFile file) {
        
            String s=null;
            try {
        
                MinioClient minioClient = new MinioClient(ENDPOINT, ACCESSKEY, SECRETKEY);
                //存入bucket不存在则创建，并设置为只读
                if (!minioClient.bucketExists(BUCKETNAME)) {
        
                    minioClient.makeBucket(BUCKETNAME);
                    minioClient.setBucketPolicy(BUCKETNAME, "*.*", PolicyType.READ_ONLY);
                }
                String filename = file.getOriginalFilename();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
                // 文件存储的目录结构
                String objectName = sdf.format(new Date()) + "/" + filename;
                // 存储文件
                minioClient.putObject(BUCKETNAME, objectName, file.getInputStream(), file.getContentType());
                LOGGER.info("文件上传成功!");
                s=ENDPOINT + "/" + BUCKETNAME + "/" + objectName;
            } catch (Exception e) {
        
                LOGGER.info("上传发生错误: {}！", e.getMessage());
            }
            return s;
        }
    
        //文件删除
        @DeleteMapping
        public String delete(String name) {
        
            try {
        
                MinioClient minioClient = new MinioClient(ENDPOINT, ACCESSKEY, SECRETKEY);
                minioClient.removeObject(BUCKETNAME, name);
            } catch (Exception e) {
        
                return "删除失败"+e.getMessage();
            }
            return "删除成功";
        }
    }
    
        @GetMapping
        public void downloadFiles(@RequestParam("filename") String filename, HttpServletResponse httpResponse) {
        
    
            try {
        
    
                MinioClient minioClient = new MinioClient(ENDPOINT, ACCESSKEY, SECRETKEY);
                InputStream object = minioClient.getObject(BUCKETNAME, filename);
                byte buf[] = new byte[1024];
                int length = 0;
                httpResponse.reset();
    
                httpResponse.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
                httpResponse.setContentType("application/octet-stream");
                httpResponse.setCharacterEncoding("utf-8");
                OutputStream outputStream = httpResponse.getOutputStream();
                while ((length = object.read(buf)) > 0) {
        
                    outputStream.write(buf, 0, length);
                }
                outputStream.close();
            } catch (Exception ex) {
        
                LOGGER.info("导出失败：", ex.getMessage());
            }
        }

编写好demo程序后使用postman进行测试：使用postman文件上传时选择body中的form-data选项，然后属性栏里面选择file属性就可以实现文件上传了。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70 6]

删除文件时输入文件的相对路径即可删除：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70 7]  
导出文件时填好文件名称，选择save and download即可在postman中导出文件：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3RjOTc5OTA3NDYx_size_16_color_FFFFFF_t_70 8]

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[20200610193752233.png]: https://img-blog.csdnimg.cn/20200610193752233.png
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[20200610193822760.png]: https://img-blog.csdnimg.cn/20200610193822760.png
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[20200610193859319.png]: https://img-blog.csdnimg.cn/20200610193859319.png
[20200610193912636.png]: https://img-blog.csdnimg.cn/20200610193912636.png
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