Spring SFTP 예제

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.SocketException;

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;

public class SFTPClient {
	
	//private static final int BUFFER_SIZE = 4096;
	private String server; // 도착지 IP
    private int port = 22; // SFTP 기본포트
	private String username; // 사용자명
	private String password; // 사용자 비밀번호
	private JSch jsch;
	
	private Session session;
	private Channel channel;
	private ChannelSftp channelSftp;
	
	public SFTPClient(String server, String username, String password){
        this.jsch = new JSch();
        this.server = server;
        this.username = username;
        this.password = password;
	}
	
	public void connect() throws JSchException {
		System.out.println("connecting server ....." + server);
		try {
			// 세션객체 생성
			session = jsch.getSession(username, server, port);
			
			//패스워드 설정
			session.setPassword(password);
			
			// 세션설정 정보설정
			java.util.Properties config = new java.util.Properties();
			//호스트검사 X
			config.put("StrictHostKeyChecking", "no");
			session.setConfig(config);
			
			// 서버 접속
			session.connect();
			
			//SFTP CHANNEL OPEN
			channel = session.openChannel("sftp");
			
			// 채널 연결
			channel.connect();
			System.out.println("connecting SECCESS ....." + server);
		} catch (JSchException e) {
			System.out.println("connecting FAILD ....." + server);
			e.printStackTrace();
		}
		//System.out.println(channel);
		channelSftp = (ChannelSftp) channel;
	}
	
	/*
	 * 
	 * Parameter
	 * 
	 * file : 전송할 FILE
	 * fileName : 파일명
	 * fptpath : 전송할 경로
	 * 
	 * */
	public String upload(File file, String fileName, String ftpPath) throws SocketException, IOException{
		String result = "fail";
		FileInputStream in;
		try {
			connect(); // 서버 및 SFTP 채널 연결
			System.out.println("======== Upload File " + file.getPath() + " at " + server + " in " + ftpPath + " START");
			//System.out.println(ftpPath);
			 in = new FileInputStream(file);
			
			//디렉토리 변경
			channelSftp.cd(ftpPath);
			
			// 업로드
			channelSftp.put(in, fileName);
			
			result = "SUCCESS";
			in.close();
		} catch (JSchException e) {
			e.printStackTrace();
		} catch (SftpException e) {
			e.printStackTrace();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (NullPointerException e) {
			//CONNECT 실패시를 위한 Ex
			e.printStackTrace();
		}
		System.out.println("======= Uploaded : " + file.getPath() + " at " + server);
		
		return result;
	}
	
	// 파일서버 및 세션종료
	public void disconnect(){
		channelSftp.quit();
		session.disconnect();
	}
	
}