java 從linux 下載文件

public static void main(String[] args) {
        SshClient client = new SshClient();
        try {
            ConsoleKnownHostsKeyVerification console = new ConsoleKnownHostsKeyVerification();
            client.connect("192.168.13.51", 22);//IP和端口
            //設置用戶名和密碼
            PasswordAuthenticationClient pwd = new PasswordAuthenticationClient();
            pwd.setUsername("root");
            pwd.setPassword("passw0rd");
            int result = client.authenticate(pwd);
            BASE64Encoder encoder = new BASE64Encoder();
            if (result == AuthenticationProtocolState.COMPLETE) {//若是鏈接完成
                SftpClient sftp = client.openSftpClient();
                List<SftpFile> list = sftp.ls("/root");
                for (SftpFile f : list) {
                    if (f.getFilename().equalsIgnoreCase("A16669F409774609BEB_144000820000_10012562.pdf")) {
                        String name = f.getFilename();
                        String filename = name.split("\\.")[0];
                        String fpqqlsh = filename.split("_")[0];
                        File file = new File("d:\\" + f.getFilename());
                        FileOutputStream fos = new FileOutputStream(file);
                        FileAttributes fa = sftp.get(f.getAbsolutePath(), fos);
                        fos.write(fa.toByteArray());
                        fos.close();
                    }
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }