Smb协议实现内网共享目录文件处理及踩坑记录

Smb协议实现内网共享目录文件处理及踩坑记录

一、业务场景
公司内网环境，有部分比较古老的业务数据保存在一台windows服务器的共享目录里面。现在需要操作这个windows服务器的共享目录来上传下载删除文件。
二、共享目录

三、查了查资料，操作windows共享目录要通过smb协议。途中遇到一个问题，smb的协议版本问题导致无法连接windows共享目录，最后在GitHub上找到一个日本人对smb封装的依赖。

        
            org.codelibs</groupId>
            jcifs</artifactId>
            2.1.19</version>
        </dependency>

上代码：
上传文件返回链接

   /** 共享目录上传
     * upload
     * @param file
     * @return
     */
    @SneakyThrows
    public String upload(MultipartFile file,String custName,Long code) {
        OutputStream out = null;
        String filePath = "smb://" + host + path + code + "-" +custName+"/"+file.getOriginalFilename();
        String path = "smb://" + host + this.path + code + "-" +custName;
        try {
            NtlmPasswordAuthenticator npa = new NtlmPasswordAuthenticator(null, userFile, password);
            CIFSContext context = SingletonContext.getInstance().withCredentials(npa);
            SmbFile sf = new SmbFile(path, context);
            if (!sf.exists()){
                sf.mkdirs();
            }
            SmbFile sf1 = new SmbFile(filePath, context);
            InputStream inputStream = new BufferedInputStream(file.getInputStream());
            out = new BufferedOutputStream(new SmbFileOutputStream(sf1));
            byte[] buffer = file.getBytes();
            //一次性读取所有文件
            while (inputStream.read(buffer) != -1) {
                out.write(buffer);
            }
            out.flush();
        }catch (Exception e){
            try {
                out.close();
            }catch (IOException e1){
                throw new BusinessException("流关闭失败："+e1.getMessage());
            }
        }
        return this.path + code + "-" +custName+"/"+file.getOriginalFilename();
    }

下载文件：

   /**
     * 共享目录
     * @param response
     */
    @SneakyThrows
    public void xiazai(HttpServletResponse response,String addr,String contenType) {
        String filePath = "smb://"+host+addr;
        NtlmPasswordAuthenticator npa = new NtlmPasswordAuthenticator(null, userFile, password);
        CIFSContext context = SingletonContext.getInstance().withCredentials(npa);
        SmbFile sf = new SmbFile(filePath, context);
        if (!sf.exists()){
            throw new BusinessException("文件不存在");
        }
        InputStream in = null ;
        ByteArrayOutputStream out = null ;
        try {
            sf.connect(); //尝试连接
            //创建文件流
            in = new BufferedInputStream(new SmbFileInputStream(sf));
            out = new ByteArrayOutputStream((int)sf.length());
            //读取文件内容
            byte[] buffer = new byte[4096];
            int len = 0;
            while ((len = in.read(buffer, 0, buffer.length)) != - 1) {
                out.write(buffer, 0, len);
            }
            if (StringUtils.isNotEmpty(contenType)){
                response.setContentType(contenType);
            }else {
                response.setContentType("application/force-download");
            }
            response.setCharacterEncoding("UTF-8");
            response.setHeader("Content-Disposition", "no-store");
            out.writeTo(response.getOutputStream());
            out.flush();
        }
        catch (Exception e) {
            String msg = "下载远程文件出错：" + e.getLocalizedMessage();
            System.out.println(msg);
        }
        finally {
            try {
                if(out != null) {
                    out.close();
                }
                if(in != null) {
                    in.close();
                }
            }
            catch (Exception e) {
                throw new BusinessException(e.getMessage());
            }
        }

    }

删除文件

    /**
     * 共享目录
     * @param
     */
    @SneakyThrows
    public void remove(String addr) {
        String filePath = "smb://"+host+addr;
        NtlmPasswordAuthenticator npa = new NtlmPasswordAuthenticator(null, userFile, password);
        CIFSContext context = SingletonContext.getInstance().withCredentials(npa);
        SmbFile sf = new SmbFile(filePath, context);
        if (!sf.exists()){
            throw new BusinessException("共享目录或文件不存在："+addr);
        }
        sf.delete();
    }

创建目录

    /**
     * 共享目录
     * @param path
     */
    @SneakyThrows
    public void mkdir(String path) {
        String filePath = "smb://"+host+"/DocLib/"+this.path;
        NtlmPasswordAuthenticator npa = new NtlmPasswordAuthenticator(null, userFile, password);
        CIFSContext context = SingletonContext.getInstance().withCredentials(npa);
        SmbFile sf = new SmbFile(filePath, context);
        if (!sf.exists()){
            sf.mkdir();
            System.out.println("创建成功");
        }
    }

查询list

    /**
     * 共享目录
     * @return
     */
    @SneakyThrows
    public Wrapper list() {
        String filePath = "smb://"+host+"/DocLib/10";
        NtlmPasswordAuthenticator npa = new NtlmPasswordAuthenticator(null, userFile, password);
        CIFSContext context = SingletonContext.getInstance().withCredentials(npa);
        SmbFile sf = new SmbFile(filePath, context);
        List list = new ArrayList<>();
        if (sf != null) {
            for (int i = 0; i < sf.listFiles().length; i++) {
                System.out.println(sf.listFiles()[i].getPath());
                list.add(sf.listFiles()[i].getPath());
            }
        }
        return WrapMapper.ok(list);
    }