java 使用jsch 远程链接linux执行命令

            一个简单的jsch链接linux并执行命令的utils。

         

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.jcraft.jsch.Channel;
import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;



public class ShellUtils {
	private static JSch jsch;
	private static Session session;

	
	/**
	 * 连接到指定的IP
	 * 
	 * @throws JSchException
	 */
	public static void connect(String user, String passwd, String host) throws JSchException {
		jsch = new JSch();
		session = jsch.getSession(user, host, 22);
		session.setPassword(passwd);
		
		java.util.Properties config = new java.util.Properties();
		config.put("StrictHostKeyChecking", "no");
		session.setConfig(config);
		
		session.connect();
	}

	/**
	 * 执行相关的命令
	 * @throws JSchException 
	 */
	public static void execCmd(String command, String user, String passwd, String host) throws JSchException {
		connect(user, passwd, host);
		
		BufferedReader reader = null;
		Channel channel = null;

		try {
			while (command != null) {
				channel = session.openChannel("exec");
				((ChannelExec) channel).setCommand(command);
				
				channel.setInputStream(null);
				((ChannelExec) channel).setErrStream(System.err);

				channel.connect();
				InputStream in = channel.getInputStream();
				reader = new BufferedReader(new InputStreamReader(in));
				String buf = null;
				while ((buf = reader.readLine()) != null) {
					System.out.println(buf);
				}
			}
		} catch (IOException e) {
			e.printStackTrace();
		} catch (JSchException e) {
			e.printStackTrace();
		} finally {
			try {
				reader.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
			channel.disconnect();
			session.disconnect();
		}
	}
   
}