如何使用 Java 從 SFTP 伺服器檢索檔案？

import com.jcraft.jsch.*;

public class SftpFileRetriever {

    public static void main(String[] args) throws JSchException {
        JSch jsch = new JSch();
        String knownHostsFilename = "/home/username/.ssh/known_hosts";
        jsch.setKnownHosts(knownHostsFilename);

        Session session = jsch.getSession("remote-username", "remote-host");
        {
            // Interactive version
            // This version allows you to selectively update specified known_hosts file.
            // You'll need to implement the UserInfo interface, and MyUserInfo is a swing implementation provided in JSch's Sftp.java example.
            UserInfo ui = new MyUserInfo();
            session.setUserInfo(ui);

            // Non-interactive version
            // This version relies on the host key being in the known-hosts file.
            // session.setPassword("remote-password");
        }

        session.connect();

        Channel channel = session.openChannel("sftp");
        channel.connect();

        ChannelSftp sftpChannel = (ChannelSftp) channel;

        sftpChannel.get("remote-file", "local-file");

        sftpChannel.exit();
        session.disconnect();
    }
}