查找ftp上的文件，并将文件转换为base64文件流返回

你的名字 2024-03-30 10:38 88阅读 0赞

if (StringUtils.isBlank(bdcdyh)) {
        throw new ServiceRuntimeException("bdcdyh is null");
    }
    String fileName = signApprovedMapper.selectDzht(bdcdyh);
    FTPClient ftpClient = new FTPClient();
    String re = null;
    InputStream inputStream = null;
    try {
        ftpClient.connect(ftpHost, ftpPort);//ip地址，端口号
        ftpClient.login(user, password);//账户，密码
        ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
        //是否成功登录服务器
        int reply = ftpClient.getReplyCode();
        if (!FTPReply.isPositiveCompletion(reply)) {
            ftpClient.disconnect();
        }
    
        inputStream = ftpClient.retrieveFileStream(fileName);
    
    
        if (inputStream != null) {
            byte[] data = null;
            ByteArrayOutputStream outStream = new ByteArrayOutputStream();
            data = new byte[inputStream.available()];
            int len = 0;
            while ((len = inputStream.read(data)) != -1) {
                outStream.write(data, 0, len);
            }
            data = outStream.toByteArray();
            Base64.Encoder encoder = Base64.getEncoder();
            re = encoder.encodeToString(data);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (ftpClient.isConnected()) {
            try {
                ftpClient.disconnect();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (null != inputStream) {
            try {
                inputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return re;