FTPClient ftpClient = new FTPClient();

        ftpClient.connect(host,port);

        ftpClient.login(userName, password);

        ftpClient.setControlEncoding(encoding);

        ftpClient.changeWorkingDirectory(workDir);

        ftpClient.setFileType(FTP.BINARY_FILE_TYPE);//设置上传文件类型为二进制，否则将无法打开文件

        ftpClient.enterLocalPassiveMode();
        

        String base64;

        InputStream inputStream = null;

        try {
　　　　　　　　///防止中文乱码

            if (!StringUtils.isEmpty(remotDir)){

                remoteFileName = new  String(remotDir.getBytes("GBK"), "iso-8859-1")+

                        File.separator+new  String(remoteFileName.getBytes("GBK"), "iso-8859-1");

            }else{

                remoteFileName = new  String(remoteFileName.getBytes("GBK"), "iso-8859-1");

            }

            //获取待读文件输入流

            inputStream = ftpClient.retrieveFileStream(remoteFileName);

            //inputStream.available() 获取返回在不阻塞的情况下能读取的字节数，正常情况是文件的大小

            byte[] bytes = new byte[inputStream.available()];

            inputStream.read(bytes);//将文件数据读到字节数组中

            Base64.Encoder encoder = Base64.getEncoder();

            base64 = encoder.encodeToString(bytes);//将字节数组转成base64字符串

            log.info("read file {} success",remoteFileName);

//            ftpClient.logout();

        } catch (IOException e) {

            log.error("read file fail ----->>>{}",e.getCause());

            return null;

        }finally {

            if (null!=inputStream){

                try {

                    inputStream.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

 try {

            if (!StringUtils.isEmpty(remoteDir)){

                originName = new String(remoteDir.getBytes("GBK"),"iso-8859-1")+File.separator+

                        new String(originName.getBytes("GBK"),"iso-8859-1");

            }else{

                originName =  new String(originName.getBytes("GBK"),"iso-8859-1");

            }

            Boolean isSuccess = ftpClient.storeFile(originName,inputStream);//保存文件

            if (!isSuccess){

                throw new FtpException(originName+"---》上传失败！");

            }

            log.info("{}---》上传成功！",originName);

        } catch (IOException e) {

            log.error("{}---》上传失败！",originName);

            throw new FtpException(originName+"上传失败！");

        }finally {

            if (null!=inputStream){

                try {

                    inputStream.close();

                } catch (IOException e) {

                    log.debug(e.getMessage());

                }

            }

        }