SFTP的使用

SFTP的使用:

1.项目中需要引入jar包,下载地址:https://sourceforge.net/projects/jsch/files/jsch.jar/

2.需要下载SFTP服务器,下载地址:http://www.freesshd.com/?ctt=download

   服务器的配置参考:http://www.cnblogs.com/zxx-813/p/7353806.html、http://jingyan.baidu.com/article/f7ff0bfc1ebd322e27bb1344.html

3.java代码(基于SFTP上传、下载文件(单个以及批量)):

   ChannelSftp使用api:http://epaul.github.io/jsch-documentation/javadoc/index.html?com/jcraft/jsch/ChannelSftp.html

package test.sftp;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.Vector;

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.SftpATTRS;
import com.jcraft.jsch.SftpException;

public class Test2 {
    
    private static ChannelSftp sftp = null;  
    
    private static String host = "127.0.0.1";
    private static int port = 22;
    private static String username = "root";
    private static String password = "root";
    private static Session sshSession = null;

    /**
     * main方法
     * @param args
     */
    public static void main(String[] args) {
        ChannelSftp channelSftp = connect(host, port, username, password);
        System.out.println(channelSftp);
        
        sftp = channelSftp;
        
        /** 
         * 上传单个文件 
         * @param remotePath:远程保存目录 
         * @param remoteFileName:保存文件名 
         * @param localPath:本地上传目录(以路径符号结束) 
         * @param localFileName:上传的文件名 
         * @return
         */ 
        /*String remotePath = "/test1/"; //远程保存目录
        String remoteFileName = "test.rar"; //保存文件名
        String localPath = "C:\Users\lyc\Desktop\"; //本地上传目录(以路径符号结束) 
        String localFileName = "msftpsrvr.rar"; //reservation3.sql //上传的文件名 
        uploadFile(remotePath,remoteFileName,localPath,localFileName);*/
        
        /** 
         * 下载单个文件 
         * @param directory:下载目录 
         * @param downloadFile:下载的文件 
         * @param saveFile:存在本地的路径 
         * @param sftp 
         */
        /*String directory = "/test/"; //下载目录 
        String downloadFile = "test.sql"; //下载的文件 
        String saveFile = "D:\"; //存在本地的路径 

        download(directory,downloadFile,saveFile,sftp);*/
        
        /**
         * 批量上传文件
         * @param remotePath:远程保存目录
         * @param localPath:本地上传目录(以路径符号结束)
         * @param del:上传后是否删除本地文件
         * @return
         */
        /*String remotePath = "/test/"; 
        String localPath = "C:/Users/lyc/Desktop/aa/";
        boolean del = false;
        bacthUploadFile(remotePath,localPath,del);*/
        
        /**
         * 批量下载文件
         * @param remotPath:远程下载目录(以路径符号结束,可以为相对路径eg:/assess/sftp/jiesuan_2/2014/)
         * @param localPath:本地保存目录(以路径符号结束,D:Duanshasftp)
         * @param fileFormat:下载文件格式(以特定字符开头,为空不做检验)
         * @param fileEndFormat:下载文件格式(文件格式)
         * @param del:下载后是否删除sftp文件
         * @return
         */
        String remotePath = "/test/";
        String localPath = "C:/Users/lyc/Desktop/aa/";
        String fileFormat = ""; //下载特定字符开头的文件
        String fileEndFormat = "x"; //下载某一种格式的文件(下载特定字符结尾的文件)
        boolean del = false;
        batchDownLoadFile(remotePath,localPath,fileFormat,fileEndFormat,del);
        
    }
    
    /**
     * 链接sftp服务器
     * @param host 服务器地址
     * @param port 服务器端口
     * @param username 登录用户名
     * @param password 登录密码
     * @return
     */
    public static ChannelSftp connect(String host,int port,String username,String password){
        ChannelSftp sftp = null;
        JSch jsch = new JSch();
        try {
            sshSession = jsch.getSession(username, host, port);
            System.out.println("创建session!");
            sshSession.setPassword(password);
            Properties sshConfig = new Properties();
            sshConfig.put("StrictHostKeyChecking", "no");
            sshSession.setConfig(sshConfig);
        
            
            sshSession.connect();
            System.out.println("session链接");
            
            Channel channel = sshSession.openChannel("sftp");
            channel.connect();
            
            sftp = (ChannelSftp)channel;
            System.out.println("成功链接到"+host+".");
        } catch (JSchException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return sftp;
        
    }
    
    /** 
     * 上传单个文件 
     * @param remotePath:远程保存目录 
     * @param remoteFileName:保存文件名 
     * @param localPath:本地上传目录(以路径符号结束) 
     * @param localFileName:上传的文件名 
     * @return
     */ 
    public static boolean uploadFile(String remotePath, String remoteFileName,String localPath, String localFileName){  
        FileInputStream in = null;  
        try {  
            createDir(remotePath);  //远程保存目录
            File file = new File(localPath + localFileName); //本地上传目录(以路径符号结束) 
            in = new FileInputStream(file);  
            sftp.put(in, remoteFileName); //远程文件名

            return true;  
        }catch (FileNotFoundException e){  
            e.printStackTrace();  
        }catch (SftpException e){  
            e.printStackTrace();  
        }  
        finally 
        {  
            if (in != null){ 
                try{  
                    in.close();  
                }catch (IOException e){  
                    e.printStackTrace();  
                }  
            }  
        }
        return false;  
    }  
    
    /** 
     * 创建目录 
     * @param createpath 远程保存目录 
     * @return 
     */ 
    public static boolean createDir(String createpath)  {  
        try {  
            if (isDirExist(createpath)){  //文件存在
                sftp.cd(createpath);  //cd()更改当前远程目录
                return true;  
            }  
            String pathArry[] = createpath.split("/");  
            StringBuffer filePath = new StringBuffer("/");  
            for (String path : pathArry){  
                if (path.equals("")){  
                    continue;  
                }  
                filePath.append(path + "/");  
                if (isDirExist(filePath.toString())){
                    sftp.cd(filePath.toString());  
                } 
                else{  
                    // 建立目录  
                    sftp.mkdir(filePath.toString()); //mkdir()创建一个新的远程目录  
                    // 进入并设置为当前目录  
                    sftp.cd(filePath.toString());  
                }
            }  
            sftp.cd(createpath);  
            return true;  

        }  
        catch (SftpException e){  
            e.printStackTrace();  
        }  

        return false;  

    }  
    
    /** 
     * 判断目录是否存在 
     * @param directory 
     * @return 
     */
    public static boolean isDirExist(String directory){
        boolean isDirExistFlag = false;  
        try{  
            SftpATTRS sftpATTRS = sftp.lstat(directory);  //lstat()检索文件或目录的文件属性
            isDirExistFlag = true;  
            System.out.println(sftpATTRS.isDir()); 
            return sftpATTRS.isDir();  //isDir()检查此文件是否为目录
        }catch (Exception e){
            if (e.getMessage().toLowerCase().equals("no such file")){  
                isDirExistFlag = false;  
            }  
        }
        return isDirExistFlag;
    }  
    
    /**
     * 下载单个文件 
     * @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 static void download(String directory, String downloadFile,  
                        String saveFile, ChannelSftp sftp) {  
        try {  
            sftp.cd(directory); //下载目录
            sftp.get(downloadFile,saveFile); //下载的文件 存在本地的路径   
        }catch (Exception e){  
            e.printStackTrace();  
        }  
    }  
    
    /**
     * 批量上传文件
     * @param remotePath:远程保存目录
     * @param localPath:本地上传目录(以路径符号结束)
     * @param del:上传后是否删除本地文件
     * @return
     */
    public static boolean bacthUploadFile(String remotePath, String localPath,
        boolean del)
    {
      try
      {
        /*connect();*/
        File file = new File(localPath);
        File[] files = file.listFiles();
        for (int i = 0; i < files.length; i++){
          if (files[i].isFile()
              && files[i].getName().indexOf("bak") == -1){
            if (uploadFile(remotePath, files[i].getName(),
                localPath, files[i].getName())
                && del){ //上传文件
              deleteFile(localPath + files[i].getName()); //上传后删除本地文件
            }
          }
        }
        /*if (log.isInfoEnabled())
        {
          log.info("upload file is success:remotePath=" + remotePath
              + "and localPath=" + localPath + ",file size is "
              + files.length);
        }*/
        return true;
      }catch (Exception e){
        e.printStackTrace();
      }finally{
        disconnect();
      }
      return false;
   
    }
    
    /**
     * 删除本地文件
     * @param filePath
     * @return
     */
    public static boolean deleteFile(String filePath){
      File file = new File(filePath);
      if (!file.exists()){
        return false;
      }
   
      if (!file.isFile()){
        return false;
      }
      boolean rs = file.delete();
      /*if (rs && log.isInfoEnabled())
      {
        log.info("delete file success from local.");
      }*/
      return rs;
    }
    
    /**
     * 关闭连接
     */
    public static void disconnect(){
        if (sftp != null){
            if (sftp.isConnected()){
              sftp.disconnect();
              /*if (log.isInfoEnabled())
              {
                log.info("sftp is closed already");
              }*/
            }
        }
        if (sshSession != null){
          if (sshSession.isConnected()){
            sshSession.disconnect();
            /*if (log.isInfoEnabled())
            {
              log.info("sshSession is closed already");
            }*/
          }
        }
    }
    
    
    
    /**
     * 批量下载文件
     * @param remotPath:远程下载目录(以路径符号结束,可以为相对路径eg:/assess/sftp/jiesuan_2/2014/)
     * @param localPath:本地保存目录(以路径符号结束,D:Duanshasftp)
     * @param fileFormat:下载文件格式(以特定字符开头,为空不做检验)
     * @param fileEndFormat:下载文件格式(文件格式)
     * @param del:下载后是否删除sftp文件
     * @return
     */
    @SuppressWarnings("rawtypes")
    public static List<String> batchDownLoadFile(String remotePath, String localPath,
        String fileFormat, String fileEndFormat, boolean del)
    {
      List<String> filenames = new ArrayList<String>();
      try
      {
        // connect();
        //Vector v = listFiles(remotePath);
        Vector v = sftp.ls(remotePath); //lstat(String path):列出远程目录的内容
        // sftp.cd(remotePath);
        if (v.size() > 0)
        {
          System.out.println("本次处理文件个数不为零,开始下载...fileSize=" + v.size());
          Iterator it = v.iterator();
          while (it.hasNext())
          {
            LsEntry entry = (LsEntry) it.next();
            String filename = entry.getFilename();
            SftpATTRS attrs = entry.getAttrs();
            if (!attrs.isDir())
            {
              boolean flag = false;
              String localFileName = localPath + filename;
              fileFormat = fileFormat == null ? "" : fileFormat
                  .trim();
              fileEndFormat = fileEndFormat == null ? ""
                  : fileEndFormat.trim();
              // 三种情况
              if (fileFormat.length() > 0 && fileEndFormat.length() > 0)
              {
                if (filename.startsWith(fileFormat) && filename.endsWith(fileEndFormat))
                {
                  flag = downloadFile(remotePath, filename,localPath, filename);
                  if (flag)
                  {
                    filenames.add(localFileName);
                    if (flag && del)
                    {
                      deleteSFTP(remotePath, filename);
                    }
                  }
                }
              }
              else if (fileFormat.length() > 0 && "".equals(fileEndFormat))
              {
                if (filename.startsWith(fileFormat))
                {
                  flag = downloadFile(remotePath, filename, localPath, filename);
                  if (flag)
                  {
                    filenames.add(localFileName);
                    if (flag && del)
                    {
                      deleteSFTP(remotePath, filename);
                    }
                  }
                }
              }
              else if (fileEndFormat.length() > 0 && "".equals(fileFormat))
              {
                if (filename.endsWith(fileEndFormat))
                {
                  flag = downloadFile(remotePath, filename,localPath, filename);
                  if (flag)
                  {
                    filenames.add(localFileName);
                    if (flag && del)
                    {
                      deleteSFTP(remotePath, filename);
                    }
                  }
                }
              }
              else
              {
                flag = downloadFile(remotePath, filename,localPath, filename);
                if (flag)
                {
                  filenames.add(localFileName);
                  if (flag && del)
                  {
                    deleteSFTP(remotePath, filename);
                  }
                }
              }
            }
          }
        }
        /*if (log.isInfoEnabled())
        {
          log.info("download file is success:remotePath=" + remotePath
              + "and localPath=" + localPath + ",file size is"
              + v.size());
        }*/
      }
      catch (SftpException e)
      {
        e.printStackTrace();
      }
      finally
      {
        // this.disconnect();
      }
      return filenames;
    }
    
    /**
     * 下载单个文件
     * @param remotPath:远程下载目录(以路径符号结束)
     * @param remoteFileName:下载文件名
     * @param localPath:本地保存目录(以路径符号结束)
     * @param localFileName:保存文件名
     * @return
     */
    public static boolean downloadFile(String remotePath, String remoteFileName,String localPath, String localFileName)
    {
      FileOutputStream fieloutput = null;
      try
      {
        // sftp.cd(remotePath);
        File file = new File(localPath + localFileName);
        // mkdirs(localPath + localFileName);
        fieloutput = new FileOutputStream(file);
        sftp.get(remotePath + remoteFileName, fieloutput);
        /*if (log.isInfoEnabled())
        {
          log.info("===DownloadFile:" + remoteFileName + " success from sftp.");
        }*/
        return true;
      }
      catch (FileNotFoundException e)
      {
        e.printStackTrace();
      }
      catch (SftpException e)
      {
        e.printStackTrace();
      }
      finally
      {
        if (null != fieloutput)
        {
          try
          {
            fieloutput.close();
          }
          catch (IOException e)
          {
            e.printStackTrace();
          }
        }
      }
      return false;
    }
    
    /**
     * 删除stfp文件
     * @param directory:要删除文件所在目录
     * @param deleteFile:要删除的文件
     * @param sftp
     */
    public static void deleteSFTP(String directory, String deleteFile)
    {
      try
      {
        // sftp.cd(directory);
        sftp.rm(directory + deleteFile);
        /*if (log.isInfoEnabled())
        {
          log.info("delete file success from sftp.");
        }*/
      }
      catch (Exception e)
      {
        e.printStackTrace();
      }
    }
    
    /**
     * 列出目录下的文件
     * 
     * @param directory:要列出的目录
     * @param sftp
     * @return
     * @throws SftpException
     */
    /*@SuppressWarnings("rawtypes")
    public static Vector listFiles(String directory) throws SftpException
    {
      return sftp.ls(directory);
    }*/
}
原文地址:https://www.cnblogs.com/super-chao/p/7797944.html