fastdfs集群文件上传，下载，删除

亦凉 2023-01-01 12:55 99阅读 0赞

### fastdfs集群文件上传，下载，删除 ###

*   *   *   *  源码
             *  UploadController
             *  FastDFSUtils
             *  fdfs\_client.conf
             *  集群搭建步骤

#### [源码][Link 1] ####

#### UploadController ####

@EnableSwagger2
    @RestController
    @RequestMapping("/request")
    @Api(description = "fdfs文件上传与下载")
    public class UploadController {
        private static final  String URL = "classpath:fdfs_client.conf";
    
        @PostMapping("/uploadFile")
        @ApiOperation("fdfs方法上传")
        public String uploadFile(@RequestParam("file") MultipartFile uploadFile) throws Exception {
            //文件名
            String originalName = uploadFile.getOriginalFilename();
            //拓展名
            String name = originalName.substring(originalName.lastIndexOf('.')+1);
            String path = FastDFSUtils.upload_file(uploadFile.getBytes(), originalName, uploadFile.getSize());
            return path;
        }
    
        //没实现选定下载地址
        @GetMapping("/downLoadFile")
        @ApiOperation("fdfs方法下载")
        public String downLoadFile() throws Exception {
            byte[] bytes = FastDFSUtils.download_file("group1", "M00/00/00/wKjngl_wTvWAIDq-AASE-wcdb3Y241.jpg");
            // 1.用日期命名文件
            Date now = new Date();
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            String fileName = dateFormat.format(now) + ".jpg";
            System.out.println(fileName);
            // 2.转为图片jpg格式
            //()中是下载到的地址
            FileOutputStream fileOutputStream = new FileOutputStream("C:\\Users\\LZY\\Downloads\\"+fileName);
            fileOutputStream.write(bytes);
            fileOutputStream.close();
            return "下载成功";
        }
    
    
        @GetMapping("/deleteFile")
        @ApiOperation("fdfs方法删除")
        public String deleteFile() throws Exception {
            FastDFSUtils.delete_file("group1", "M00/00/00/wKjngl_u13iAGTRcAACMjz-Fy6g372.jpg");
            return "删除成功";
        }
    }

#### FastDFSUtils ####

public class FastDFSUtils {
        static {
            try {
                //ClientGloble 读配置文件
                ClassPathResource resource = new ClassPathResource("fdfs_client.conf");
                ClientGlobal.init(resource.getClassLoader().getResource("fdfs_client.conf").getPath());
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
        /**
         * @param pic  文件二进制
         * @param name 文件名称
         * @param size 文件大小
         * @return group1/M00/00/01/wKjIgFWOYc6APpjAAAD-qk29i78248.jpg
         * @Description: 上传文件
         */
        public static String upload_file(byte[] pic, String name, long size) {
            String path = null;
            try {
                //客户端
                TrackerClient trackerClient = new TrackerClient();
                TrackerServer trackerServer = trackerClient.getConnection();
                StorageServer storageServer = null;
                StorageClient1 storageClient1 = new StorageClient1(trackerServer, storageServer);
                //文件11.jpg  根据文件名称得到文件后缀    jpg
                String ext = FilenameUtils.getExtension(name);
                NameValuePair[] meta_list = new NameValuePair[3];
                meta_list[0] = new NameValuePair("fileName", name);
                meta_list[1] = new NameValuePair("fileExt", ext);
                meta_list[2] = new NameValuePair("fileSize", String.valueOf(size));
                //  group1/M00/00/01/wKjIgFWOYc6APpjAAAD-qk29i78248.jpg
                path = storageClient1.upload_file1(pic, ext, meta_list);
            } catch (Exception e) {
                e.printStackTrace();
            }
            return path;
        }
    
        /**
         * 文件下载
         * return:文件字节码
         * group_name:group1
         * romte_fileName:/opt/fastdfs/storage/files/data/00/00/wKjngl_u0YmANIh-AACMjz-Fy6g293.jpg
         *                                            M00/00/00/wKjng1_u5x6AShRRAACMjz-Fy6g127.jpg
         */
        public static byte[] download_file(String group_name, String romte_fileName) throws Exception {
            /** 创建存储客户端对象 */
            StorageClient storageClient = new StorageClient();
            /**
             * 文件下载
             */
            byte[] bytes = storageClient.download_file(group_name, romte_fileName);
            return bytes;
        }
    
        /**
         * 删除文件
         * return:0代表删除成功
         * group_name:group1
         * romte_fileName:M00/00/01/wKjIgFWOYc6APpjAAAD-qk29i78248.jpg
         */
        public static int delete_file(String group_name, String romte_fileName) throws Exception {
            /** 创建存储客户端对象 */
            StorageClient storageClient = new StorageClient();
            /** 删除文件 */
            int res = storageClient.delete_file(group_name, romte_fileName);
            return res;
        }
    }

#### fdfs\_client.conf ####

tracker_server=192.168.231.128:22122
    tracker_server=192.168.231.129:22122

#### [集群搭建步骤][Link 2] ####

[Link 1]: https://github.com/Ciel1998/fdfs.git
[Link 2]: https://blog.csdn.net/Ciel_Y/article/details/111997407