jsch使用之Java实现ssh sftp协议传输

JSch 是SSH2的一个纯Java实现。它允许你连接到一个sshd 服务器，使用端口转发，X11转发，文件传输等等。你可以将它的功能集成到你自己的 程序中。同时该项目也提供一个J2ME版本用来在手机上直连SSHD服务器。

JSCH是一个纯粹的用java实现SSH功能的java  library. 官方地址为：http://www.jcraft.com/jsch/

GitHub 地址为:https://github.com/vngx/vngx-jsch

mvn 配置如下：

com.jcraftjsch0.1.46

demo：

package com.jiepu.jsch;
/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/**
 * This program will demonstrate the sftp protocol support.
 *   $ CLASSPATH=.:../build javac Sftp.java
 *   $ CLASSPATH=.:../build java Sftp
 * You will be asked username, host and passwd. 
 * If everything works fine, you will get a prompt 'sftp>'. 
 * 'help' command will show available command.
 * In current implementation, the destination path for 'get' and 'put'
 * commands must be a file, not a directory.
 *
 */
import com.jcraft.jsch.*;
import java.awt.*;
import javax.swing.*;

public class Sftp{
	
	//http://www.jcraft.com/jsch/examples/Sftp.java
  public static void main(String[] arg){

    try{
      JSch jsch=new JSch();

      String host=null;
      if(arg.length>0){
        host=arg[0];
      }
      else{
        host=JOptionPane.showInputDialog("Enter username@hostname",
                                         System.getProperty("user.name")+
                                         "@localhost"); 
      }
      String user=host.substring(0, host.indexOf('@'));
      host=host.substring(host.indexOf('@')+1);
      int port=22;

      Session session=jsch.getSession(user, host, port);

      // username and password will be given via UserInfo interface.
      UserInfo ui=new MyUserInfo();
      session.setUserInfo(ui);

      session.connect();

      Channel channel=session.openChannel("sftp");
      channel.connect();
      ChannelSftp c=(ChannelSftp)channel;

      java.io.InputStream in=System.in;
      java.io.PrintStream out=System.out;

      java.util.Vector cmds=new java.util.Vector();
      byte[] buf=new byte[1024];
      int i;
      String str;
      int level=0;

      while(true){
        out.print("sftp> ");
	cmds.removeAllElements();
        i=in.read(buf, 0, 1024);
	if(i<=0)break;

        i--;
        if(i>0 && buf[i-1]==0x0d)i--;
        //str=new String(buf, 0, i);
        //System.out.println("|"+str+"|");
	int s=0;
	for(int ii=0; ii0){ cmds.addElement(new String(buf, s, ii-s)); }
	    while(ii'7'){foo=-1; break;}
  	      foo<<=3;
	      foo|=(k-'0');
	    }
	    if(foo==-1)continue;
	  }
	  else{
  	    try{foo=Integer.parseInt((String)cmds.elementAt(1));}
	    catch(Exception e){continue;}
	  }
	  try{
	    if(cmd.equals("chgrp")){ c.chgrp(foo, path); }
	    else if(cmd.equals("chown")){ c.chown(foo, path); }
	    else if(cmd.equals("chmod")){ c.chmod(foo, path); }
	  }
	  catch(SftpException e){
	    System.out.println(e.toString());
	  }
	  continue;
	}
	if(cmd.equals("pwd") || cmd.equals("lpwd")){
           str=(cmd.equals("pwd")?"Remote":"Local");
	   str+=" working directory: ";
          if(cmd.equals("pwd")) str+=c.pwd();
	  else str+=c.lpwd();
	  out.println(str);
	  continue;
	}
	if(cmd.equals("ls") || cmd.equals("dir")){
	  String path=".";
	  if(cmds.size()==2) path=(String)cmds.elementAt(1);
	  try{
	    java.util.Vector vv=c.ls(path);
	    if(vv!=null){
	      for(int ii=0; ii2) continue;
          String p1 = cmds.size()==1 ? ".": (String)cmds.elementAt(1);
          SftpStatVFS stat = c.statVFS(p1);

          long size = stat.getSize();
          long used = stat.getUsed();
          long avail = stat.getAvailForNonRoot();
          long root_avail = stat.getAvail();
          long capacity = stat.getCapacity();

          System.out.println("Size: "+size);
          System.out.println("Used: "+used);
          System.out.println("Avail: "+avail);
          System.out.println("(root): "+root_avail);
          System.out.println("%Capacity: "+capacity);

          continue;
        }
	if(cmd.equals("stat") || cmd.equals("lstat")){
          if(cmds.size()!=2) continue;
	  String p1=(String)cmds.elementAt(1);
	  SftpATTRS attrs=null;
	  try{
	    if(cmd.equals("stat")) attrs=c.stat(p1);
	    else attrs=c.lstat(p1);
	  }
	  catch(SftpException e){
	    System.out.println(e.toString());
	  }
	  if(attrs!=null){
            out.println(attrs);
	  }
	  else{
	  }
	  continue;
	}
	if(cmd.equals("readlink")){
          if(cmds.size()!=2) continue;
	  String p1=(String)cmds.elementAt(1);
	  String filename=null;
	  try{
	    filename=c.readlink(p1);
            out.println(filename);
	  }
	  catch(SftpException e){
	    System.out.println(e.toString());
	  }
	  continue;
	}
	if(cmd.equals("realpath")){
          if(cmds.size()!=2) continue;
	  String p1=(String)cmds.elementAt(1);
	  String filename=null;
	  try{
	    filename=c.realpath(p1);
            out.println(filename);
	  }
	  catch(SftpException e){
	    System.out.println(e.toString());
	  }
	  continue;
	}
	if(cmd.equals("version")){
	  out.println("SFTP protocol version "+c.version());
	  continue;
	}
	if(cmd.equals("help") || cmd.equals("?")){
	  out.println(help);
	  continue;
	}
        out.println("unimplemented command: "+cmd);
      }
      session.disconnect();
    }
    catch(Exception e){
      System.out.println(e);
    }
    System.exit(0);
  }

  public static class MyUserInfo implements UserInfo, UIKeyboardInteractive{
    public String getPassword(){ return passwd; }
    public boolean promptYesNo(String str){
      Object[] options={ "yes", "no" };
      int foo=JOptionPane.showOptionDialog(null, 
             str,
             "Warning", 
             JOptionPane.DEFAULT_OPTION, 
             JOptionPane.WARNING_MESSAGE,
             null, options, options[0]);
       return foo==0;
    }
  
    String passwd;
    JTextField passwordField=(JTextField)new JPasswordField(20);

    public String getPassphrase(){ return null; }
    public boolean promptPassphrase(String message){ return true; }
    public boolean promptPassword(String message){
      Object[] ob={passwordField}; 
      int result=
	  JOptionPane.showConfirmDialog(null, ob, message,
					JOptionPane.OK_CANCEL_OPTION);
      if(result==JOptionPane.OK_OPTION){
	passwd=passwordField.getText();
	return true;
      }
      else{ return false; }
    }
    public void showMessage(String message){
      JOptionPane.showMessageDialog(null, message);
    }
    final GridBagConstraints gbc = 
      new GridBagConstraints(0,0,1,1,1,1,
                             GridBagConstraints.NORTHWEST,
                             GridBagConstraints.NONE,
                             new Insets(0,0,0,0),0,0);
    private Container panel;
    public String[] promptKeyboardInteractive(String destination,
                                              String name,
                                              String instruction,
                                              String[] prompt,
                                              boolean[] echo){
      panel = new JPanel();
      panel.setLayout(new GridBagLayout());

      gbc.weightx = 1.0;
      gbc.gridwidth = GridBagConstraints.REMAINDER;
      gbc.gridx = 0;
      panel.add(new JLabel(instruction), gbc);
      gbc.gridy++;

      gbc.gridwidth = GridBagConstraints.RELATIVE;

      JTextField[] texts=new JTextField[prompt.length];
      for(int i=0; i=this.count*100/max){ return true; }
      percent=this.count*100/max;

      monitor.setNote("Completed "+this.count+"("+percent+"%) out of "+max+".");     
      monitor.setProgress((int)this.count);

      return !(monitor.isCanceled());
    }
    public void end(){
      monitor.close();
    }
  }

  private static String help =
"      Available commands:\n"+
"      * means unimplemented command.\n"+
"cd path                       Change remote directory to 'path'\n"+
"lcd path                      Change local directory to 'path'\n"+
"chgrp grp path                Change group of file 'path' to 'grp'\n"+
"chmod mode path               Change permissions of file 'path' to 'mode'\n"+
"chown own path                Change owner of file 'path' to 'own'\n"+
"df [path]                     Display statistics for current directory or\n"+
"                              filesystem containing 'path'\n"+
"help                          Display this help text\n"+
"get remote-path [local-path]  Download file\n"+
"get-resume remote-path [local-path]  Resume to download file.\n"+
"get-append remote-path [local-path]  Append remote file to local file\n"+
"hardlink oldpath newpath      Hardlink remote file\n"+
"*lls [ls-options [path]]      Display local directory listing\n"+
"ln oldpath newpath            Symlink remote file\n"+
"*lmkdir path                  Create local directory\n"+
"lpwd                          Print local working directory\n"+
"ls [path]                     Display remote directory listing\n"+
"*lumask umask                 Set local umask to 'umask'\n"+
"mkdir path                    Create remote directory\n"+
"put local-path [remote-path]  Upload file\n"+
"put-resume local-path [remote-path]  Resume to upload file\n"+
"put-append local-path [remote-path]  Append local file to remote file.\n"+
"pwd                           Display remote working directory\n"+
"stat path                     Display info about path\n"+
"exit                          Quit sftp\n"+
"quit                          Quit sftp\n"+
"rename oldpath newpath        Rename remote file\n"+
"rmdir path                    Remove remote directory\n"+
"rm path                       Delete remote file\n"+
"symlink oldpath newpath       Symlink remote file\n"+
"readlink path                 Check the target of a symbolic link\n"+
"realpath path                 Canonicalize the path\n"+
"rekey                         Key re-exchanging\n"+
"compression level             Packet compression will be enabled\n"+
"version                       Show SFTP version\n"+
"?                             Synonym for help";
}

package com.jiepu.jsch;

/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/**
 * This program will demonstrate the file transfer from remote to local
 *   $ CLASSPATH=.:../build javac ScpFrom.java
 *   $ CLASSPATH=.:../build java ScpFrom user@remotehost:file1 file2
 * You will be asked passwd. 
 * If everything works fine, a file 'file1' on 'remotehost' will copied to
 * local 'file1'.
 *
 */
import com.jcraft.jsch.*;
import java.awt.*;
import javax.swing.*;
import java.io.*;

public class ScpFrom {
	
	
	//[email protected]:/home/yunshouhu/info.dat info.dat
	
	// [email protected]:/home/yunshouhu/elasticsearch/elasticsearch-1.7.1//NOTICE.txt info.txt

	public static void main(String[] arg) {
		if (arg.length != 2) {
			System.err
					.println("usage: java ScpFrom user@remotehost:file1 file2");
			System.exit(-1);
		}

		FileOutputStream fos = null;
		try {

			String user = arg[0].substring(0, arg[0].indexOf('@'));
			arg[0] = arg[0].substring(arg[0].indexOf('@') + 1);
			String host = arg[0].substring(0, arg[0].indexOf(':'));
			String rfile = arg[0].substring(arg[0].indexOf(':') + 1);
			String lfile = arg[1];

			String prefix = null;
			if (new File(lfile).isDirectory()) {
				prefix = lfile + File.separator;
			}

			JSch jsch = new JSch();
			Session session = jsch.getSession(user, host, 22);

			// username and password will be given via UserInfo interface.
			UserInfo ui = new MyUserInfo();
			session.setUserInfo(ui);
			session.connect();

			// exec 'scp -f rfile' remotely
			String command = "scp -f " + rfile;
			Channel channel = session.openChannel("exec");
			((ChannelExec) channel).setCommand(command);

			// get I/O streams for remote scp
			OutputStream out = channel.getOutputStream();
			InputStream in = channel.getInputStream();

			channel.connect();

			byte[] buf = new byte[1024];

			// send '\0'
			buf[0] = 0;
			out.write(buf, 0, 1);
			out.flush();

			while (true) {
				int c = checkAck(in);
				if (c != 'C') {
					break;
				}

				// read '0644 '
				in.read(buf, 0, 5);

				long filesize = 0L;
				while (true) {
					if (in.read(buf, 0, 1) < 0) {
						// error
						break;
					}
					if (buf[0] == ' ')
						break;
					filesize = filesize * 10L + (long) (buf[0] - '0');
				}

				String file = null;
				for (int i = 0;; i++) {
					in.read(buf, i, 1);
					if (buf[i] == (byte) 0x0a) {
						file = new String(buf, 0, i);
						break;
					}
				}

				// System.out.println("filesize="+filesize+", file="+file);

				// send '\0'
				buf[0] = 0;
				out.write(buf, 0, 1);
				out.flush();

				// read a content of lfile
				fos = new FileOutputStream(prefix == null ? lfile : prefix
						+ file);
				int foo;
				while (true) {
					if (buf.length < filesize)
						foo = buf.length;
					else
						foo = (int) filesize;
					foo = in.read(buf, 0, foo);
					if (foo < 0) {
						// error
						break;
					}
					fos.write(buf, 0, foo);
					filesize -= foo;
					if (filesize == 0L)
						break;
				}
				fos.close();
				fos = null;

				if (checkAck(in) != 0) {
					System.exit(0);
				}

				// send '\0'
				buf[0] = 0;
				out.write(buf, 0, 1);
				out.flush();
			}

			session.disconnect();

			System.exit(0);
		} catch (Exception e) {
			System.out.println(e);
			try {
				if (fos != null)
					fos.close();
			} catch (Exception ee) {
			}
		}
	}

	static int checkAck(InputStream in) throws IOException {
		int b = in.read();
		// b may be 0 for success,
		// 1 for error,
		// 2 for fatal error,
		// -1
		if (b == 0)
			return b;
		if (b == -1)
			return b;

		if (b == 1 || b == 2) {
			StringBuffer sb = new StringBuffer();
			int c;
			do {
				c = in.read();
				sb.append((char) c);
			} while (c != '\n');
			if (b == 1) { // error
				System.out.print(sb.toString());
			}
			if (b == 2) { // fatal error
				System.out.print(sb.toString());
			}
		}
		return b;
	}

	public static class MyUserInfo implements UserInfo, UIKeyboardInteractive {
		public String getPassword() {
			return passwd;
		}

		public boolean promptYesNo(String str) {
			Object[] options = { "yes", "no" };
			int foo = JOptionPane.showOptionDialog(null, str, "Warning",
					JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE,
					null, options, options[0]);
			return foo == 0;
		}

		String passwd;
		JTextField passwordField = (JTextField) new JPasswordField(20);

		public String getPassphrase() {
			return null;
		}

		public boolean promptPassphrase(String message) {
			return true;
		}

		public boolean promptPassword(String message) {
			Object[] ob = { passwordField };
			int result = JOptionPane.showConfirmDialog(null, ob, message,
					JOptionPane.OK_CANCEL_OPTION);
			if (result == JOptionPane.OK_OPTION) {
				passwd = passwordField.getText();
				return true;
			} else {
				return false;
			}
		}

		public void showMessage(String message) {
			JOptionPane.showMessageDialog(null, message);
		}

		final GridBagConstraints gbc = new GridBagConstraints(0, 0, 1, 1, 1, 1,
				GridBagConstraints.NORTHWEST, GridBagConstraints.NONE,
				new Insets(0, 0, 0, 0), 0, 0);
		private Container panel;

		public String[] promptKeyboardInteractive(String destination,
				String name, String instruction, String[] prompt, boolean[] echo) {
			panel = new JPanel();
			panel.setLayout(new GridBagLayout());

			gbc.weightx = 1.0;
			gbc.gridwidth = GridBagConstraints.REMAINDER;
			gbc.gridx = 0;
			panel.add(new JLabel(instruction), gbc);
			gbc.gridy++;

			gbc.gridwidth = GridBagConstraints.RELATIVE;

			JTextField[] texts = new JTextField[prompt.length];
			for (int i = 0; i < prompt.length; i++) {
				gbc.fill = GridBagConstraints.NONE;
				gbc.gridx = 0;
				gbc.weightx = 1;
				panel.add(new JLabel(prompt[i]), gbc);

				gbc.gridx = 1;
				gbc.fill = GridBagConstraints.HORIZONTAL;
				gbc.weighty = 1;
				if (echo[i]) {
					texts[i] = new JTextField(20);
				} else {
					texts[i] = new JPasswordField(20);
				}
				panel.add(texts[i], gbc);
				gbc.gridy++;
			}

			if (JOptionPane.showConfirmDialog(null, panel, destination + ": "
					+ name, JOptionPane.OK_CANCEL_OPTION,
					JOptionPane.QUESTION_MESSAGE) == JOptionPane.OK_OPTION) {
				String[] response = new String[prompt.length];
				for (int i = 0; i < prompt.length; i++) {
					response[i] = texts[i].getText();
				}
				return response;
			} else {
				return null; // cancel
			}
		}
	}
}

package com.jiepu.jsch;

/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
/**
 * This program will demonstrate how to use "aes128-cbc".
 *
 */
import com.jcraft.jsch.*;

import java.awt.*;

import javax.swing.*;
//http://www.jcraft.com/jsch/examples/AES.java
public class AES{
	
  public static void main(String[] arg){

    try{
      JSch jsch=new JSch();

      //jsch.setKnownHosts("/home/foo/.ssh/known_hosts");

      String host=null;
      if(arg.length>0){
        host=arg[0];
      }
      else{
        host=JOptionPane.showInputDialog("Enter username@hostname",
                                         System.getProperty("user.name")+
                                         "@localhost"); 
      }
      String user=host.substring(0, host.indexOf('@'));
      host=host.substring(host.indexOf('@')+1);

      Session session=jsch.getSession(user, host, 22);
      //session.setPassword("your password");
 
      // username and password will be given via UserInfo interface.
      UserInfo ui=new MyUserInfo("yunshouhu");
      session.setUserInfo(ui);

      session.setConfig("cipher.s2c", "aes128-cbc,3des-cbc,blowfish-cbc");
      session.setConfig("cipher.c2s", "aes128-cbc,3des-cbc,blowfish-cbc");
      session.setConfig("CheckCiphers", "aes128-cbc");

      session.connect();

      Channel channel=session.openChannel("shell");

      channel.setInputStream(System.in);
      channel.setOutputStream(System.out);

      channel.connect();
    }
    catch(Exception e){
      System.out.println(e);
    }
  }

  public static class MyUserInfo implements UserInfo, UIKeyboardInteractive{
	  
	 
    public MyUserInfo(String passwd) {
		super();
		this.passwd = passwd;
	}
	public String getPassword(){ return passwd; }
    public boolean promptYesNo(String str){
     
       return true;
    }
  
    String passwd;

    public String getPassphrase(){ return null; }
    public boolean promptPassphrase(String message){ return true; }
    public boolean promptPassword(String message){
      
    	return true;
    }
    public void showMessage(String message){
      JOptionPane.showMessageDialog(null, message);
    }

    public String[] promptKeyboardInteractive(String destination,
                                              String name,
                                              String instruction,
                                              String[] prompt,
                                              boolean[] echo){


	return prompt;
  
    }
  }
}

	4.0.0

	com.jiepu
	jsch
	0.0.1-SNAPSHOT
	jar

	jsch
	http://maven.apache.org

	
		UTF-8
	

	
		
			junit
			junit
			3.8.1
			test
		
		
			com.jcraft
			jsch
			0.1.53
		
	


	

		
			
				org.apache.maven.plugins
				maven-compiler-plugin
				
					1.7
					1.7
				
			

		
	

源码工程下载：