sftp 연결

@Component
public class SftpConnServiceImpl implements ISftpConService {
	private JSch jsch;
	private Session session = null;
	private Channel channel = null;
	private ChannelSftp channelSftp = null;

	public ChannelSftp sftpConnection(String ip, int port, String userId, String userPwd, String sftpFileDir) {
		this.jsch = new JSch();
		try {
			this.session = this.jsch.getSession(userId, ip, port);
			this.session.setPassword(userPwd);
			Properties config = new Properties();
			config.put("StrictHostKeyChecking", "no");
			this.session.setConfig(config);

			this.session.connect(1200);
			this.channel = this.session.openChannel("sftp");

			this.channelSftp = ((ChannelSftp) this.channel);
			this.channelSftp.connect(600);
			this.channel = this.session.openChannel("sftp");
			this.channel.connect();

			System.out.println("conn succenss");
		} catch (JSchException e) {
			e = e;

			sftpDisconnect();
			e.printStackTrace();
			System.out.println("conn failed");
		} finally {
		}
		return this.channelSftp;
	}

	public void sftpDisconnect() {
		if (this.channelSftp != null)
			this.channelSftp.disconnect();
		System.out.println("channelSftp disconnect");
		if (this.channel != null)
			this.channel.disconnect();
		System.out.println("channel disconnect");
		if (this.session != null)
			this.session.disconnect();
		System.out.println("session disconnect");
	}
}