1.在pom.xml檔案中引入JAR包：

<dependency>
    <groupId>com.jcraft</groupId>
    <artifactId>jsch</artifactId>
    <version>0.1.54</version>
</dependency>

2.編寫工具類SftpUtils.java，該工具類可直接拷貝使用

import com.jcraft.jsch.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.util.*;

    public class SftpUtils {
        private Logger logger = LoggerFactory.getLogger(SftpUtils.class);
        /**
         * 連線sftp伺服器
         *
         * @param host
         *            主機
         * @param port
         *            埠
         * @param username
         *            使用者名稱
         * @param password
         *            密碼
         * @return
         */
        public ChannelSftp connect(String host, int port, String username, String password) {
            ChannelSftp sftp = null;
            try {
                JSch jsch = new JSch();
                jsch.getSession(username, host, port);
                Session sshSession = jsch.getSession(username, host, port);
                System.out.println("Session created.");
                sshSession.setPassword(password);
                Properties sshConfig = new Properties();
                sshConfig.put("StrictHostKeyChecking", "no");
                sshSession.setConfig(sshConfig);
                sshSession.connect();
                System.out.println("Session connected.");
                System.out.println("Opening Channel.");
                Channel channel = sshSession.openChannel("sftp");
                channel.connect();
                sftp = (ChannelSftp) channel;
                System.out.println("Connected to " + host + ".");
            } catch (Exception e) {
                e.printStackTrace();
                sftp = null;
            }
            return sftp;
        }
        public ChannelSftp connectSftp(Session sshSession) {
            ChannelSftp sftp = null;
            try {
                System.out.println("Session connected.");
                System.out.println("Opening Channel.");
                Channel channel = sshSession.openChannel("sftp");
                channel.connect();
                sftp = (ChannelSftp) channel;
            } catch (Exception e) {
                e.printStackTrace();
                sftp = null;
            }
            return sftp;
        }
        public void exec(Session sshSession,String command) {
            ChannelExec channelExec = null;
            try {
                System.out.println("Session connected.");
                System.out.println("Opening Channel.");
                Channel channel = sshSession.openChannel("exec");
                channelExec = (ChannelExec) channel;
                channelExec.setCommand(command);
                channelExec.connect();
            } catch (Exception e) {
                e.printStackTrace();
                channelExec = null;
            }finally {
                channelExec.disconnect();
            }
        }

        public Session getSession(String host, int port, String username, String password) {
            Session sshSession = null;
            try {
                JSch jsch = new JSch();
                jsch.getSession(username, host, port);
                sshSession = jsch.getSession(username, host, port);
                System.out.println("Session created.");
                sshSession.setPassword(password);
                Properties sshConfig = new Properties();
                sshConfig.put("StrictHostKeyChecking", "no");
                sshSession.setConfig(sshConfig);
                sshSession.connect();
                System.out.println("Session connected.");
                System.out.println("Opening Channel.");
            } catch (Exception e) {
                e.printStackTrace();
            }
            return sshSession;
        }

        /**
         * 上傳檔案
         *
         * @param directory
         *            上傳的目錄
         * @param uploadFile
         *            要上傳的檔案
         * @param sftp
         */
        public String upload(String directory, String uploadFile, ChannelSftp sftp) {
            try {
                if(!directory.equals("")){
                    sftp.cd(directory);
                }
                File file = new File(uploadFile);
                sftp.put(new FileInputStream(file), file.getName());
                System.out.println("上傳完成");
                sftp.disconnect();
                sftp.getSession().disconnect();
                return "傳輸成功";
            } catch (Exception e) {
                e.printStackTrace();
                sftp.disconnect();
                try {
                    sftp.getSession().disconnect();
                } catch (JSchException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                return "傳輸失敗，請檢查配置！";
            }
        }

        /**
         * 下載檔案
         *
         * @param directory
         *            下載目錄
         * @param downloadFile
         *            下載的檔案
         * @param saveFile
         *            存在本地的路徑
         * @param sftp
         */
        public void download(String directory, String downloadFile,
                             String saveFile, ChannelSftp sftp) {
            try {
                sftp.cd(directory);
                File file = new File(saveFile);
                sftp.get(downloadFile, new FileOutputStream(file));
                sftp.disconnect();
                sftp.getSession().disconnect();
                System.out.println("download ok,session closed");
            } catch (Exception e) {
                sftp.disconnect();
                try {
                    sftp.getSession().disconnect();
                } catch (JSchException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                e.printStackTrace();
            }
        }

        public List<String> read(String directory, String readFile, ChannelSftp sftp,String charSetName) {
            List<String> stringlist = new ArrayList<>();
            InputStream inputStream = null;
            try {
                sftp.cd(directory);
                inputStream = sftp.get(readFile);
                BufferedReader br = new BufferedReader(new InputStreamReader(inputStream,charSetName));
                String line = null;
                line = br.readLine();
                while (line != null) {
                    stringlist.add(line);
                    line = br.readLine(); // 一次讀入一行資料
                }
                br.close();
            }
            catch (SftpException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return  stringlist;
        }

        /**
         * 刪除檔案
         *
         * @param directory
         *            要刪除檔案所在目錄
         * @param deleteFile
         *            要刪除的檔案
         * @param sftp
         */
        public void delete(String directory, String deleteFile, ChannelSftp sftp) {
            try {
                sftp.cd(directory);
                sftp.rm(deleteFile);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        /**
         * 列出目錄下的檔案
         *
         * @param directory
         *            要列出的目錄
         * @param sftp
         * @return
         * @throws SftpException
         */
        public Vector listFiles(String directory, ChannelSftp sftp)
                throws SftpException {
            return sftp.ls(directory);
        }

        /**
         * 將輸入流的資料上傳到sftp作為檔案
         *
         * @param directory
         *            上傳到該目錄
         * @param sftpFileName
         *            sftp端檔名
         * @param input
         *            輸入流
         * @throws SftpException
         * @throws Exception
         */
        public void upload(String directory, String sftpFileName, InputStream input,ChannelSftp sftp) throws SftpException, JSchException {
            try {
                sftp.cd(directory);
            } catch (SftpException e) {
                logger.warn("directory is not exist");
                sftp.mkdir(directory);
                sftp.cd(directory);
            }
            sftp.put(input, sftpFileName);
            if(sftp.isConnected()) {
                sftp.disconnect();
            }
            if (sftp.getSession().isConnected()) {
                sftp.getSession().disconnect();
            }
            logger.info("file:{"+sftpFileName+"} is upload successful");
        }
 

3.呼叫JSCH工具類方法獲取遠端伺服器中.txt字尾的檔案內容：

public List<Student> readFile(String host,int port,String userName,String passWord,String srcDirectory,String bakDirectory,String filterKey){
        List<Student> students = new ArrayList<>();
        SftpUtils sf = new SftpUtils();
        Session session = sf.getSession(host, port, userName, passWord);
        ChannelSftp sftp = sf.connectSftp(session); //連線
        String date = "20180601";
        String bakFolder = bakDirectory + "/" + date; //備份目錄
        SftpATTRS isExist = null;
        try {
            isExist = sftp.stat(bakFolder);//判斷備份目錄是否存在，不存在則建立
            if(isExist==null){
                sftp.mkdir(bakFolder);
            }
        } catch (SftpException e) {
        }
        try {
            sftp.cd(srcDirectory);//進入源目錄
            Vector<ChannelSftp.LsEntry> vector = sftp.ls(filterFileKey);//獲取該目錄下匹配的檔案
            logger.info("ls  " + filterKey);
            logger.info("file total num   " + vector.size());
            for (ChannelSftp.LsEntry lsEntry:vector) {
                if(lsEntry != null){
                    String filleName = lsEntry.getFilename();
                    logger.info("read the file "+filleName );
                    try {
                        List<String> list = sf.read(srcDirectory, filleName, sftp,"GBK");
                        for (int i = 0; i < list.size(); i++) {
                            String content = list.get(i);
                            if(content!=null) {
                                Student student = new Student();
                                String[] args = content.split("\\|");
                                student.setId(args[0]);
                                student.setName(args[1]);
                                students.add(student);
                            }
                        }
                        //移動檔案到備份目錄
                        String command = "mv "+(srcDirectory + "/" + filleName) + " " + bakDirectory + "/" + date + "/";
                        logger.info(command);
                        sf.exec(session,command);
                    }catch (Exception ex){
                        ex.printStackTrace();
                    }

                }
            }

        } catch (SftpException e) {
            e.printStackTrace();
        }finally {
            sftp.disconnect();
            try {
                sftp.getSession().disconnect();
            } catch (JSchException e) {
                e.printStackTrace();
            }
        }
        return  students;
    }