Use jsch to connect to linux

1: First add maven dependencies
 

<dependency>
	<groupId>com.jcraft</groupId>
	<artifactId>jsch</artifactId>
	<version>0.1.48</version>
</dependency>

use password to connect to linux

public static String exec(String host, String user, String psw, int port,
			String command) {
		String result = "";
		Session session = null;
		ChannelExec openChannel = null;
		try {
			JSch jsch = new JSch();
			session = jsch.getSession(user, host, port);
			session.setPassword(psw.getBytes());
			java.util.Properties config = new java.util.Properties();
			config.put("StrictHostKeyChecking", "no");
			session.setConfig(config);
			session.connect();
			openChannel = (ChannelExec) session.openChannel("exec");
			openChannel.setCommand(command);
			int exitStatus = openChannel.getExitStatus();
			System.out.println(exitStatus);
			openChannel.connect();
			InputStream in = openChannel.getInputStream();
			BufferedReader reader = new BufferedReader(
					new InputStreamReader(in));
			String buf = null;
			while ((buf = reader.readLine()) != null) {
				result += new String(buf.getBytes("gbk"), "UTF-8")
						+ "    <br>\r\n";
			}
		} catch (JSchException | IOException e) {
			e.printStackTrace ();
			result += e.getMessage();
		} finally {
			if (openChannel != null && !openChannel.isClosed()) {
				openChannel.disconnect();
			}
			if (session != null && session.isConnected()) {
				session.disconnect();
			}
		}
		return result;
	}
	String exec = exec("192.168.80.101", "root", "111", 22,"sleep 2;ls;");

Use the secret key to connect to linux

public static String exec1(String ip, String user, int port,
			String privateKey, String passphrase, String command) {
		String result = "";
		Session session = null;
		ChannelExec openChannel = null;
		try {
			JSch jsch = new JSch();
			jsch.addIdentity(privateKey);
			session = jsch.getSession(user, ip, port);
		
			java.util.Properties config = new java.util.Properties();
			config.put("StrictHostKeyChecking", "no");
			session.setConfig(config);
			session.connect();
			openChannel = (ChannelExec) session.openChannel("exec");
			openChannel.setCommand(command);
			int exitStatus = openChannel.getExitStatus();
			System.out.println(exitStatus);
			openChannel.connect();
			InputStream in = openChannel.getInputStream();
			BufferedReader reader = new BufferedReader(
					new InputStreamReader(in));
			String buf = null;
			while ((buf = reader.readLine()) != null) {
				result += new String(buf.getBytes("gbk"), "UTF-8")
						+ "    <br>\r\n";
			}
		} catch (JSchException | IOException e) {
			e.printStackTrace ();
			result += e.getMessage();
		} finally {
			if (openChannel != null && !openChannel.isClosed()) {
				openChannel.disconnect();
			}
			if (session != null && session.isConnected()) {
				session.disconnect();
			}
		}
		return result;
	}
  
String result=exec1("192.168.80.101", "root", 22,"C:\\Users\\ebnew\\Desktop\\office-key(1)", "", "sleep 2;ls;");