java使用JSCH连接FTP(Linux服务器)上传文件到Linux服务器

首先需要用到jsch-0.1.54.jar 包；

链接: https://pan.baidu.com/s/1kZR6MqwpCYht9Pp_D6NKQw 密码: gywx

直接上代码：

 package test;

 import java.io.File;
 import java.io.FileInputStream;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Properties;
 import java.util.Vector;

 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 import com.jcraft.jsch.Channel;
 import com.jcraft.jsch.ChannelSftp;
 import com.jcraft.jsch.ChannelSftp.LsEntry;
 import com.jcraft.jsch.JSch;
 import com.jcraft.jsch.JSchException;
 import com.jcraft.jsch.Session;
 import com.jcraft.jsch.SftpException;
 import com.opensymphony.xwork2.util.finder.ClassFinder.Info;

 public class FTPUtil {
     private static final Logger LOG = LoggerFactory.getLogger(FTPUtil.class);

     /**
      * 参考实例
      *
      * @param args
      */
     // public static void main(String[] args) {
     // File file = new File("D://36.txt");
     // FTPUtil ft = new FTPUtil();
     // Session s = ft.getSession(SFTPInfo.SFTP_REQ_HOST,
     // SFTPInfo.SFTP_DEFAULT_PORT, SFTPInfo.SFTP_REQ_USERNAME,
     // SFTPInfo.SFTP_REQ_PASSWORD);
     // Channel channel = ft.getChannel(s);
     // ChannelSftp sftp = (ChannelSftp)channel;
     // String upload = ft.uploadFile(sftp,"hot_Imgs",file);
     // System.out.println(upload);
     // ft.closeAll(sftp, channel, s); //关闭连接
     // }
     public Channel getChannel(Session session) {
         Channel channel = null;
         try {
             channel = session.openChannel("sftp");
             channel.connect();
             LOG.info("get Channel success!");
         } catch (JSchException e) {
             LOG.info("get Channel fail!", e);
         }
         return channel;
     }

     public Session getSession(String host, int port, String username,
             final String password) {
         Session session = null;
         try {
             JSch jsch = new JSch();
             jsch.getSession(username, host, port);
             session = jsch.getSession(username, host, port);
             session.setPassword(password);
             Properties sshConfig = new Properties();
             sshConfig.put("StrictHostKeyChecking", "no");
             session.setConfig(sshConfig);
             session.connect();
             LOG.info("Session connected!");
         } catch (JSchException e) {
             LOG.info("get Channel failed!", e);
         }
         return session;
     }

     /**
      * 创建文件夹
      *
      * @param sftp
      * @param dir
      *            文件夹名称
      */
     public void mkdir(ChannelSftp sftp, String dir) {
         try {
             sftp.mkdir(dir);
             System.out.println("创建文件夹成功！");
         } catch (SftpException e) {
             System.out.println("创建文件夹失败！");
             e.printStackTrace();
         }
     }

     /**
      * @param sftp
      * @param dir
      *            上传目录
      * @param file
      *            上传文件
      * @return
      */
     public String uploadFile(ChannelSftp sftp, String dir, File file) {
         String result = "";
         try {
             sftp.cd(dir);
             // File file = new File("D://34.txt"); //要上传的本地文件
             if (file != null) {
                 sftp.put(new FileInputStream(file), file.getName());
                 result = "上传成功！";
             } else {
                 result = "文件为空！不能上传！";
             }
         } catch (Exception e) {
             LOG.info("上传失败！", e);
             result = "上传失败！";
         }
         return result;
     }

     /**
      * 下载文件
      *
      * @param directory
      *            下载目录
      * @param downloadFile
      *            下载的文件
      * @param saveFile
      *            存在本地的路径
      * @param sftp
      */
     public String download(String directory, String downloadFile,
             String saveFile, ChannelSftp sftp) {
         String result = "";
         try {
             sftp.cd(directory);
             sftp.get(downloadFile, saveFile);
             result = "下载成功！";
         } catch (Exception e) {
             result = "下载失败！";
             LOG.info("下载失败！", e);
             ;
         }
         return result;
     }

     /**
      * 删除文件
      *
      * @param directory
      *            要删除文件所在目录
      * @param deleteFile
      *            要删除的文件
      * @param sftp
      */
     public String delete(String directory, String deleteFile, ChannelSftp sftp) {
         String result = "";
         try {
             sftp.cd(directory);
             sftp.rm(deleteFile);
             result = "删除成功！";
         } catch (Exception e) {
             result = "删除失败！";
             LOG.info("删除失败！", e);
         }
         return result;
     }

     private void closeChannel(Channel channel) {
         if (channel != null) {
             if (channel.isConnected()) {
                 channel.disconnect();
             }
         }
     }

     private void closeSession(Session session) {
         if (session != null) {
             if (session.isConnected()) {
                 session.disconnect();
             }
         }
     }

     public void closeAll(ChannelSftp sftp, Channel channel, Session session) {
         try {
             closeChannel(sftp);
             closeChannel(channel);
             closeSession(session);
         } catch (Exception e) {
             LOG.info("closeAll", e);
         }
     }
 }

 package test;

 public class SFTPInfo {
     public static final String SFTP_REQ_HOST = "10.10.2.20";      //ip
     public static final String SFTP_REQ_USERNAME = "gaowei";      //username
     public static final String SFTP_REQ_PASSWORD = "gaowei";      //password
     public static final int SFTP_DEFAULT_PORT = 22;      //端口
 }