Jsch使用

 

 

Jsch shell模式下的代码示例：

参考：http://stackoverflow.com/questions/6770206/what-is-the-difference-between-the-shell-channel-and-the-exec-channel-in-jsc

 

Shell.java

 

 

import java.io.ByteArrayInputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.JOptionPane;

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.UIKeyboardInteractive;
import com.jcraft.jsch.UserInfo;

public class Shell {

	public static void main(String[] arg) {
		Channel channel = null;
		Session session = null;
		try {
			String dir = Shell.class.getClassLoader().getResource(".").getFile();

			JSch jsch = new JSch();
			// System.out.println(dir);
			// System.exit(0);

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

			String host = null, host1 = null;
			Integer port = 22;
			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('@'));

			String p = null;
			if (host.indexOf(':') != -1) {
				host1 = host.substring(host.indexOf('@') + 1, host.indexOf(':'));
				p = host.substring(host.indexOf(':') + 1);
				try {
					port = Integer.parseInt(p);
				} catch (Exception e) {
					e.printStackTrace();
					port = 22;
				}
			} else {
				host1 = host.substring(host.indexOf('@') + 1);
			}
			session = jsch.getSession(user, host1, port);
			String passwd = JOptionPane.showInputDialog("Enter password");
			session.setPassword(passwd);

			UserInfo ui = new MyUserInfo() {
				public void showMessage(String message) {
					JOptionPane.showMessageDialog(null, message);
				}

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

				// If password is not given before the invocation of
				// Session#connect(),
				// implement also following methods,
				// * UserInfo#getPassword(),
				// * UserInfo#promptPassword(String message) and
				// * UIKeyboardInteractive#promptKeyboardInteractive()

			};

			session.setUserInfo(ui);

			// It must not be recommended, but if you want to skip host-key
			// check,
			// invoke following,
			// session.setConfig("StrictHostKeyChecking", "no");

			// session.connect();
			session.connect(30000); // making a connection with timeout.

			channel = session.openChannel("shell");

			// Enable agent-forwarding.
			// ((ChannelShell)channel).setAgentForwarding(true);
			SimpleDateFormat df = new SimpleDateFormat("MM/dd/yyyy");
			SimpleDateFormat df1 = new SimpleDateFormat("HH:mm:ss");
			Date d1 = new Date();
			String command = "sudo /bin/date -s " + df.format(d1) + " && sudo /bin/date -s " + df1.format(d1) + " \n";
			byte[] bytes = command.getBytes();
			ByteArrayInputStream bInput = new ByteArrayInputStream(bytes);
			// channel.setInputStream(System.in);
			channel.setInputStream(bInput);
			/*
			 * // a hack for MS-DOS prompt on Windows.
			 * channel.setInputStream(new FilterInputStream(System.in){ public
			 * int read(byte[] b, int off, int len)throws IOException{ return
			 * in.read(b, off, (len>1024?1024:len)); } });
			 */

			channel.setOutputStream(System.out);
			// FileOutputStream foutput = new FileOutputStream(dir +
			// "shell.log", true);
			// channel.setOutputStream(foutput);

			/*
			 * // Choose the pty-type "vt102".
			 * ((ChannelShell)channel).setPtyType("vt102");
			 */

			/*
			 * // Set environment variable "LANG" as "ja_JP.eucJP".
			 * ((ChannelShell)channel).setEnv("LANG", "ja_JP.eucJP");
			 */

			channel.connect();
			
			// 如果输出没有结尾，则一直等待下去
			do {
				Thread.currentThread().sleep(1000);
			} while (!channel.isEOF());

		} catch (Exception e) {
			System.out.println(e);
		} finally {
			channel.disconnect();
			session.disconnect();
		}
	}

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

		public boolean promptYesNo(String str) {
			return false;
		}

		public String getPassphrase() {
			return null;
		}

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

		public boolean promptPassword(String message) {
			return false;
		}

		public void showMessage(String message) {
		}

		public String[] promptKeyboardInteractive(String destination, String name, String instruction, String[] prompt, boolean[] echo) {
			return null;
		}
	}
}

MyUserInfo.java

 

 

 

import com.jcraft.jsch.UIKeyboardInteractive;
import com.jcraft.jsch.UserInfo;

/**
 * 主要功能是用于提示用户输入或确认信息的接口实现。
 * 
 * @author Administrator
 * 
 */
public abstract class MyUserInfo implements UserInfo, UIKeyboardInteractive {

	private String password;

	public String getPassword() {
		return this.password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public boolean promptYesNo(String str) {
		return false;
	}

	public String getPassphrase() {
		return this.password;
	}

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

	public boolean promptPassword(String message) {
		return false;
	}

	public void showMessage(String message) {
	}

	public String[] promptKeyboardInteractive(String destination, String name, String instruction, String[] prompt, boolean[] echo) {
		return null;
	}

}

 

 

 JschShellTest.java

import java.io.OutputStream;
import java.io.PrintStream;

import javax.swing.JOptionPane;

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.UserInfo;

public class JschShellTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Session session = null;
		Channel channel = null;
		String host = "127.0.0.1", user = "conkeyn", passwd = "123456";

		Integer port = 2222;

		JSch jsch = new JSch();

		try {
			String dir = Shell.class.getClassLoader().getResource(".").getFile();
			//把已经连接过的主机保存到known_hosts文件中。
			jsch.setKnownHosts(dir + ".ssh/known_hosts");
			session = jsch.getSession(user, host, port);
			session.setPassword(passwd);
			UserInfo ui = new MyUserInfo() {
				public void showMessage(String message) {
					JOptionPane.showMessageDialog(null, message);
				}

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

				// If password is not given before the invocation of
				// Session#connect(),
				// implement also following methods,
				// * UserInfo#getPassword(),
				// * UserInfo#promptPassword(String message) and
				// * UIKeyboardInteractive#promptKeyboardInteractive()

			};

			session.setUserInfo(ui);
			session.connect(30000);

			channel = session.openChannel("shell");

			//相对channel与sshd端，channel输出流是用于输出命令到sshd。
			OutputStream inputstream_for_the_channel = channel.getOutputStream();
			PrintStream commander = new PrintStream(inputstream_for_the_channel, true);

			channel.setOutputStream(System.out, true);
			
			// 可以使用以下注释的代码替代“channel.setOutputStream(System.out, true);”
			//相对channel与sshd端，channel输入流是用于接收sshd输出结果的
			// InputStream outputstream_from_the_channel = channel.getInputStream();
			// BufferedReader br = new BufferedReader(new InputStreamReader(outputstream_from_the_channel));
			// String line;
			// while ((line = br.readLine()) != null)
			// System.out.print(line+"\n");

			channel.connect();

			commander.println("ls -la");
			commander.println("cd ~");
			commander.println("ls -la");
			commander.println("exit");
			commander.close();

			//如果输出到结尾，则可以退出等待。
			do {
				Thread.sleep(1000);
			} while (!channel.isEOF());
		} catch (Exception e) {
			e.printStackTrace();
		}

		session.disconnect();

	}

}

 

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