带有JSF 2.2.2的FTPClient

Question

我有一个旧项目，我很迷茫。

我正在从FTP下载文件，但是它没有完全下载，而是在完全完成之前生成的。

我每次下载的大小都不一样，比实际大小差

FTPClient ftpClient = new FTPClient();
    ftpClient.connect("xxxx");
    ftpClient.login("xxx", "xxxx");
    ftpClient.enterLocalPassiveMode();
    ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
    ftpClient.changeWorkingDirectory("/");

    InputStream in = ftpClient.retrieveFileStream(consentimiento.getRutaFichero());
    BufferedInputStream objLector = new BufferedInputStream(in);

    FacesContext objContexto = FacesContext.getCurrentInstance();
    HttpServletResponse response = (HttpServletResponse) objContexto.getExternalContext().getResponse();

    String contentType = Utilidades.obtenerTipoDocumento("wav");
    response.setContentType(contentType);
    response.setContentLength(in.available());
    response.setHeader("Content-disposition", "attachment; filename=\"" + consentimiento.getNombreFichero() + "\"");

    BufferedOutputStream objGrabador = new BufferedOutputStream(response.getOutputStream());

    // Traspasar el contenido del fichero al objeto response
    for (int data; (data = objLector.read()) != -1;) {
        objGrabador.write(data);
    }

    objGrabador.flush();
    objGrabador.close();
    objLector.close();

    objContexto.responseComplete();