fastdfs(代码片段)

group1/M00/00/32/wKgCS114sHiAT4pGAAdRFLGbXaw.d52ca2

this.axios(
                method:‘GET‘,
                url:"/upload/upload/downloadFile",
                    headers:this.headers,
                    params:
                        id:id,
                    ,responseType: ‘blob‘
                ).then(data=>
                    if (!data) 
                        this.$message.warning("文件下载失败")
                        return
                    
                    if (typeof window.navigator.msSaveBlob !== ‘undefined‘) 
                        window.navigator.msSaveBlob(new Blob([data]),fileName)
                    else
                        let url = window.URL.createObjectURL(new Blob([data]))
                        let link = document.createElement(‘a‘)
                        link.style.display = ‘none‘
                        link.href = url
                        link.setAttribute(‘download‘,fileName)
                        document.body.appendChild(link)
                        link.click()
                        document.body.removeChild(link); //下载完成移除元素
                        window.URL.revokeObjectURL(url); //释放掉blob对象
                    
                )

　　　　 //通过id获得图片
        Upload a = getById(id);
        //获得文件服务器连接    
        FastFileStorageClient storageClient = getStorageClient();
        //下载文件
        byte[] bytes = storageClient.downloadFile(a.getFileGroup(), a.getFilePath());

        //设置文件类型和字符编码
        response.setContentType("application/octet-stream;charset=UTF-8");
        
        //设置返回的头部信息
        response.setHeader("Content-Disposition", "attachment;filename=".concat(String.valueOf(URLEncoder.encode(a.getFileName()+a.getFileType(), "UTF-8"))));
         
        response.addHeader("Content-Length", "" + bytes.length);
        
        //获得输出流
        OutputStream outputStream = response.getOutputStream();
         
        //将数组写出 
        outputStream.write(bytes);
        
        //冲刷缓冲区
        outputStream.flush();
        
        //关闭流
        outputStream.close();

//获得文件服务器地址
    public  FastFileStorageClient getStorageClient()    
        //初始化连接池
        FdfsConnectionPool pool = new FdfsConnectionPool();
        // 设置tracker
        List<String> trackers = Arrays.asList("文件服务器ip地址:端口", "文件服务器IP地址:端口");
        TrackerConnectionManager tcm = new TrackerConnectionManager(pool, trackers);
        TrackerClient trackerClient = new DefaultTrackerClient(tcm);
        // 得到storage客户端
        ConnectionManager cm = new ConnectionManager(pool);
        FastFileStorageClient storageClient = new DefaultFastFileStorageClient(trackerClient, cm);
        return storageClient;
    

　　　　//获得文件服务链接
        FastFileStorageClient sClient = getStorageClient();
        //获得文件数组
        byte[] bytes = sClient.downloadFile(a.getFileGroup(), a.getFilePath());

        BASE64Encoder npBase64Encoder = new BASE64Encoder();
        
        String s=npBase64Encoder.encode(bytes);

<img width="40" height="30" src="data:image/jpeg;base64,/9j/4QMZRXhp" />

 　　　　<dependency>
            <groupId>com.luhuiguo</groupId>
            <artifactId>fastdfs-client</artifactId>
            <version>0.4.0</version>
        </dependency>

public  FastFileStorageClient getStorageClient()    
               //初始化连接池
            FdfsConnectionPool pool = new FdfsConnectionPool();
        
            // 设置tracker
            List<String> trackers = Arrays.asList("192.168.2.77:55122", "192.168.2.78:55122");
    
            TrackerConnectionManager tcm = new TrackerConnectionManager(pool, trackers);
    
            TrackerClient trackerClient = new DefaultTrackerClient(tcm);
    
            // 得到storage客户端
            ConnectionManager cm = new ConnectionManager(pool);
    
            FastFileStorageClient storageClient = new DefaultFastFileStorageClient(trackerClient, cm);
    
            return storageClient;
    

　　　　//获得文件服务器
      FastFileStorageClient sclient = getStorageClient();
    
      //获得文件名加后缀
      String fileName =  file.getOriginalFilename();
    
      //得到文件类型
      String type = fileName.substring(fileName.indexOf(".")+1);
    
      //得到文件名称
      String name = fileName.substring(0, fileName.indexOf("."));
    
      //将文件发送到服务器
      StorePath storePath = sclient.uploadFile(file.getBytes(), type);

      String group = storePath.getGroup();
      String path = storePath.getPath();

      //1.通过group和payh下载文件
      byte[] bytes = sClient.downloadFile(group ,path );
      　　　　或
      //2.通过文件路径访问
      String url =文件服务器地址 + "/" + group + "/" + path;