sftp 文件上傳

1、添加依賴
<dependency>
   <groupId>com.jcraft</groupId>
   <artifactId>jsch</artifactId>
   <version>0.1.53</version>
</dependency>


2、工具類代碼

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.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 basePath sftp存儲根路徑：要求登錄用戶有權操作
     * @param directory 自定義的文件目錄
     * @param uploadFile 上傳的文件名
     * @param input 輸入流
     * @throws SftpException
     */
    public void upload(String basePath, String directory, String uploadFile, InputStream input) throws SftpException{
        basePath += directory;
        try {
            sftp.cd(basePath);
        } catch (SftpException e) {
            log.warn("目錄不存在，開始創建目錄");
            String[] split = basePath.split("/");
            String path = "";
            for (int i = 0; i < split.length; i++) {
                String dir = split[i];
                if(dir==null||"".equals(dir.trim())){
                    continue;
                }
                path += "/" + dir;
                try {
                    sftp.cd(path);
                } catch (SftpException  se){
                    try {
                        sftp.mkdir(path);
                        log.error("創建目錄【 " + path + "】");
                    } catch (SftpException se1) {
                        log.error("創建目錄【 " + path + "】失敗");
                        log.error(se1.getMessage());
                    }
                }
            }
        }
        sftp.cd(basePath);
        sftp.put(input, uploadFile);
        log.info("文件上傳成功:【{}】" , uploadFile);
    }

    /**
     * 上傳單個文件
     * @param basePath sftp存儲根路徑：要求登錄用戶有權操作
     * @param directory 用戶的存儲目錄
     * @param uploadFile 要上傳的本地文件,包括路徑
     * @throws FileNotFoundException
     * @throws SftpException
     * @throws Exception
     */
    public void upload(String basePath, String directory, String uploadFile) throws FileNotFoundException, SftpException{
        File file = new File(uploadFile);
        upload(basePath, directory, file.getName(), new FileInputStream(file));
    }

    /**
     * 上傳單個文件
     * @param basePath sftp存儲根路徑：要求登錄用戶有權操作
     * @param directory 用戶的存儲目錄
     * @param uploadFile 要上傳的本地文件,包括路徑
     * @throws FileNotFoundException
     * @throws SftpException
     * @throws Exception
     */
    public void upload(String basePath, String directory, File uploadFile) throws FileNotFoundException, SftpException{
        upload(basePath, directory, uploadFile.getName(), new FileInputStream(uploadFile));
    }

    /**
     * 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 basePath sftp存儲根路徑：要求登錄用戶有權操作
     * @param directory 用戶的存儲目錄
     * @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 basePath, String directory, String sftpFileName, byte[] byteArr) throws SftpException{
        upload(basePath, directory, sftpFileName, new ByteArrayInputStream(byteArr));
    }

    /**
     * 將字符串按照指定的字符編碼上傳到sftp
     * @param basePath sftp存儲根路徑：要求登錄用戶有權操作
     * @param directory 用戶的存儲目錄
     * @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 basePath, String directory, String sftpFileName, String dataStr, String charsetName) throws UnsupportedEncodingException, SftpException{
        upload(basePath, 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
     * @return
     * @throws SftpException
     */
    public Vector<?> listFiles(String directory) throws SftpException {
        return sftp.ls(directory);
    }

    // 測試
    public static void main(String[] args) throws SftpException, IOException {
        SFTPUtil sftp = new SFTPUtil("root", "eFVw8Fby", "139.196.125.230", 22);
        sftp.login();
//        //byte[] buff = sftp.download("/opt", "start.sh");
//        //System.out.println(Arrays.toString(buff));

        File file = new File("D:\\test.txt");
//        InputStream is = new FileInputStream(file);
//        sftp.upload("/home/tomcat", "/test", "test.txt", is);
        sftp.upload("/home/tomcat", "/test", file);
        sftp.logout();
    }

}