Java 通过ssh连接lunix，执行语句

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这里总结两种方法。

第一种方法：Ganymed SSH-2 for Java是一个纯Java实现的SHH2库，官网为http://www.ganymed.ethz.ch/ssh2/

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.util.ArrayList;import java.util.List;import ch.ethz.ssh2.Connection;import ch.ethz.ssh2.Session;import ch.ethz.ssh2.StreamGobbler;public class SshCommandExcute {    /**     * 运行命令     *      * @param command     *            命令     * @return     */    public String run(String command) {        String hostname = "127.0.0.1";        int port = 22;        String username = "root";        String password = "root";        // 指明连接主机的IP地址        Connection conn = new Connection(hostname,port);        Session ssh = null;        String result = "";        try {            // 连接到主机            conn.connect();            // 使用用户名和密码校验            boolean isconn = conn.authenticateWithPassword(username, password);            if (!isconn) {                System.out.println("用户名称或者是密码不正确");            } else {                System.out.println("已经连接OK");                ssh = conn.openSession();                ssh.execCommand(command);                InputStream is = new StreamGobbler(ssh.getStdout());                BufferedReader brs = new BufferedReader(new InputStreamReader(is, "UTF-8"));                while (true) {                    // System.out.println(brs.readLine());                    String line = brs.readLine();                    if (line == null) {                        break;                    }                    result += line + "\r\n";                }            }            // 连接的Session和Connection对象都需要关闭            ssh.close();            conn.close();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return result;    }    public static void main(String[] arg) {        String command = "ls;hadoop fs -ls /";        String line = new SshCommandExcute().run(command);        System.out.println(line);    }}

第二种方法：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。官网:http://www.jcraft.com/jsch/

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.nio.charset.Charset;import java.util.Properties;import com.jcraft.jsch.ChannelExec;import com.jcraft.jsch.JSch;import com.jcraft.jsch.Session;import com.opensymphony.xwork2.Result;public class SSHConnect {    /**     * @param args     */    public static void main(String[] args) {    }    public static String SSHConnectAndExecute(String cmd)    {        Session session=null;        ChannelExec channelExec=null;         BufferedReader reader=null;         String result="";        try {            JSch jsch = new JSch(); // 创建JSch对象              String hostname = "127.0.0.1";            int port = 22;            String username = "root";            String password = "root";            session = jsch.getSession(username, hostname, port); // 根据用户名，主机ip，端口获取一个Session对象              session.setPassword(password); // 设置密码              Properties config = new Properties();              config.put("StrictHostKeyChecking", "no");              session.setConfig(config); // 为Session对象设置properties              int timeout = 600000000;              session.setTimeout(timeout); // 设置timeout时间              session.connect(); // 通过Session建立链接              channelExec = (ChannelExec) session.openChannel("exec");              channelExec.setCommand(cmd);              channelExec.setInputStream(null);              channelExec.setErrStream(System.err);              channelExec.connect();              InputStream in = channelExec.getInputStream();              reader = new BufferedReader(new InputStreamReader(in, Charset.forName("UTF-8")));              String buf = null;              StringBuffer sb = new StringBuffer();              while ((buf = reader.readLine()) != null) {                  sb.append(buf);                  result+=buf+"\r\n";                System.out.println(buf);// 打印控制台输出              }          } catch (Exception e) {            // TODO: handle exception        }finally{              if (null != session) {                      session.disconnect();                  }               try {                reader.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }               channelExec.disconnect();          }        return result;    }}

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