SFTP上傳文件到服務器 工具類

工具類：

package com.witlink.box.server.common.util;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import java.util.Vector;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.omg.CORBA.SystemException;
import org.slf4j.LoggerFactory;

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;
/**
 *
 * @ClassName: SFTPUtil
 * @Description: sftp連接工具類
 * @date 2017年5月22日 下午11:17:21
 * @version 1.0.0
 */
public class SFTPUtil {
    private transient Logger log = LoggerFactory.getLogger(this.getClass());

    private ChannelSftp sftp;

    private Session session;
    /** FTP 登錄用戶名*/
    private String username;
    /** FTP 登錄密碼*/
    private String password;
    /** 私鑰 */
    private String privateKey;
    /** FTP 服務器地址IP地址*/
    private String host;
    /** FTP 端口*/
    private int port;


    /**
     * 構造基於密碼認證的sftp對象
     * @param userName
     * @param password
     * @param host
     * @param port
     */
    public SFTPUtil(String username, String password, String host, int port) {
        this.username = username;
        this.password = password;
        this.host = host;
        this.port = port;
    }

    /**
     * 構造基於祕鑰認證的sftp對象
     * @param userName
     * @param host
     * @param port
     * @param privateKey
     */
    public SFTPUtil(String username, String host, int port, String privateKey) {
        this.username = username;
        this.host = host;
        this.port = port;
        this.privateKey = privateKey;
    }

    public SFTPUtil(){}

    /**
     * 連接sftp服務器
     *
     * @throws Exception
     */
    public void login(){
        try {
            JSch jsch = new JSch();
            if (privateKey != null) {
                jsch.addIdentity(privateKey);// 設置私鑰
                log.info("sftp connect,path of private key file：{}" , privateKey);
            }
            log.info("sftp connect by host:{} username:{}",host,username);

            session = jsch.getSession(username, host, port);
            log.info("Session is build");
            if (password != null) {
                session.setPassword(password);
            }
            Properties config = new Properties();
            config.put("StrictHostKeyChecking", "no");

            session.setConfig(config);
            session.connect();
            log.info("Session is connected");

            Channel channel = session.openChannel("sftp");
            channel.connect();
            log.info("channel is connected");

            sftp = (ChannelSftp) channel;
            log.info(String.format("sftp server host:[%s] port:[%s] is connect successfull", host, port));
        } catch (JSchException e) {
            log.error("Cannot connect to specified sftp server : {}:{} \n Exception message is: {}", new Object[]{host, port, e.getMessage()});
        }
    }

    /**
     * 關閉連接 server
     */
    public void logout(){
        if (sftp != null) {
            if (sftp.isConnected()) {
                sftp.disconnect();
                log.info("sftp is closed already");
            }
        }
        if (session != null) {
            if (session.isConnected()) {
                session.disconnect();
                log.info("sshSession is closed already");
            }
        }
    }

    /**
     * 將輸入流的數據上傳到sftp作爲文件
     *
     * @param directory
     *            上傳到該目錄
     * @param sftpFileName
     *            sftp端文件名
     * @param in
     *            輸入流
     * @throws SftpException
     * @throws Exception
     */
    public void upload(String directory, String sftpFileName, InputStream input) throws SftpException{
        try {
            sftp.cd(directory);
        } catch (SftpException e) {
            log.warn("directory is not exist");

            String[] folders = directory.split("/");

            try {
                sftp.cd("/");
                for (String folder: folders) {
                    if (folder.length()>0) {
                        try {
                            sftp.cd(folder);
                        } catch (Exception ex) {
                            sftp.mkdir(folder);
                            sftp.cd(folder);
                        }
                    }
                }
            } catch (SftpException ex) {
                ex.printStackTrace();
                System.out.println("創建文件夾時報錯");
            }

            sftp.mkdir(directory);
            sftp.cd(directory);
        }
        sftp.put(input, sftpFileName);
        log.info("file:{} is upload successful" , sftpFileName);
    }

    /**
     * 上傳單個文件
     *
     * @param directory
     *            上傳到sftp目錄
     * @param uploadFile
     *            要上傳的文件,包括路徑
     * @throws FileNotFoundException
     * @throws SftpException
     * @throws Exception
     */
    public void upload(String directory, String uploadFile) throws FileNotFoundException, SftpException{
        File file = new File(uploadFile);
        upload(directory, file.getName(), new FileInputStream(file));
    }

    /**
     * 將byte[]上傳到sftp，作爲文件。注意:從String生成byte[]是，要指定字符集。
     *
     * @param directory
     *            上傳到sftp目錄
     * @param sftpFileName
     *            文件在sftp端的命名
     * @param byteArr
     *            要上傳的字節數組
     * @throws SftpException
     * @throws Exception
     */
    public void upload(String directory, String sftpFileName, byte[] byteArr) throws SftpException{
        upload(directory, sftpFileName, new ByteArrayInputStream(byteArr));
    }

    /**
     * 將字符串按照指定的字符編碼上傳到sftp
     *
     * @param directory
     *            上傳到sftp目錄
     * @param sftpFileName
     *            文件在sftp端的命名
     * @param dataStr
     *            待上傳的數據
     * @param charsetName
     *            sftp上的文件，按該字符編碼保存
     * @throws UnsupportedEncodingException
     * @throws SftpException
     * @throws Exception
     */
    public void upload(String directory, String sftpFileName, String dataStr, String charsetName) throws UnsupportedEncodingException, SftpException{
        upload(directory, sftpFileName, new ByteArrayInputStream(dataStr.getBytes(charsetName)));
    }

    /**
     * 下載文件
     *
     * @param directory
     *            下載目錄
     * @param downloadFile
     *            下載的文件
     * @param saveFile
     *            存在本地的路徑
     * @throws SftpException
     * @throws FileNotFoundException
     * @throws Exception
     */
    public void download(String directory, String downloadFile, String saveFile) throws SftpException, FileNotFoundException{
        if (directory != null && !"".equals(directory)) {
            sftp.cd(directory);
        }
        File file = new File(saveFile);
        sftp.get(downloadFile, new FileOutputStream(file));
        log.info("file:{} is download successful" , downloadFile);
    }
    /**
     * 下載文件
     * @param directory 下載目錄
     * @param downloadFile 下載的文件名
     * @return 字節數組
     * @throws SftpException
     * @throws IOException
     * @throws Exception
     */
    public byte[] download(String directory, String downloadFile) throws SftpException, IOException{
        if (directory != null && !"".equals(directory)) {
            sftp.cd(directory);
        }
        InputStream is = sftp.get(downloadFile);

        byte[] fileData = IOUtils.toByteArray(is);

        log.info("file:{} is download successful" , downloadFile);
        return fileData;
    }

    /**
     * 刪除文件
     *
     * @param directory
     *            要刪除文件所在目錄
     * @param deleteFile
     *            要刪除的文件
     * @throws SftpException
     * @throws Exception
     */
    public void delete(String directory, String deleteFile) throws SftpException{
        sftp.cd(directory);
        sftp.rm(deleteFile);
    }

    /**
     * 列出目錄下的文件
     *
     * @param directory
     *            要列出的目錄
     * @param sftp
     * @return
     * @throws SftpException
     */
    public Vector<?> listFiles(String directory) throws SftpException {
        return sftp.ls(directory);
    }

    public static void main(String[] args) throws SftpException, IOException {
        SFTPUtil sftp = new SFTPUtil("root", "root", "192.168.50.15", 22);
        sftp.login();
        //byte[] buff = sftp.download("/opt", "start.sh");
        //System.out.println(Arrays.toString(buff));
//        File file = new File("D:\\upload\\index.html");
//        InputStream is = new FileInputStream(file);
//
//        sftp.upload("/data/work", "test_sftp_upload.csv", is);
        sftp.logout();
    }
}

用法：

	SFTPUtil sftp = new SFTPUtil(username, password, host, port);
		sftp.login();
		sftp.delete(zipfilepath,ledContentPo.getZipName());//從服務器上刪除
		String path = mImagesPath +folderName+"/"+fileName;//自己的路徑
    	File dest = new File(new File(path).getAbsolutePath());
		InputStream is = new FileInputStream(dest);
        sftp.upload(filepath+folderName, fileName, is);//上傳到服務器
        sftp.logout();

相關方法：

//獲取本地路徑
String localpath = this.getClass().getClassLoader().getResource(".").getPath();