java程序连接Liunx服务器并且执行命令

JSch 介绍

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

1.导入jar包

<dependency>
    <groupId>com.jcraft</groupId>
    <artifactId>jsch</artifactId>
    <version>0.1.</version>
</dependency>

2.JAVA程序连接SSH实例

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;

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;
import com.jcraft.jsch.UserInfo;

/**
 *
 * @desc SSHConnectionTest.java
 *
 * @author xianlei
 * @date 2018年3月29日下午5:53:24
 */
public class SSHConnectionTest {
      //远程主机的ip地址
    private String ip;
    //远程主机登录用户名
    private String username;
    //远程主机的登录密码
    private String password;
    //设置ssh连接的远程端口
    public static final int DEFAULT_SSH_PORT = 22;
    //保存输出内容的容器
    private ArrayList<String> stdout;

    class MyUserInfo implements UserInfo {

        @Override
        public String getPassphrase() {
            // TODO Auto-generated method stub
            System.out.println("MyUserInfo.getPassphrase()");
            return null;
        }

        @Override
        public String getPassword() {
            // TODO Auto-generated method stub
            System.out.println("MyUserInfo.getPassword()");
            return null;
        }

        @Override
        public boolean promptPassphrase(String arg0) {
            // TODO Auto-generated method stub
            System.out.println("MyUserInfo.promptPassphrase()");
            System.out.println(arg0);
            return false;
        }

        @Override
        public boolean promptPassword(String arg0) {
            // TODO Auto-generated method stub
            System.out.println("MyUserInfo.promptPassword()");
            System.out.println(arg0);
            return false;
        }

        @Override
        public boolean promptYesNo(String arg0) {
            // TODO Auto-generated method stub'
             System.out.println("MyUserInfo.promptYesNo()");
             System.out.println(arg0);
             if (arg0.contains("The authenticity of host")) {
                 return true;
             }
            return true;
        }

        @Override
        public void showMessage(String arg0) {
            // TODO Auto-generated method stub
            System.out.println("MyUserInfo.showMessage()");
        }

    }

    /**
     * 初始化登录信息
     * @param ip
     * @param username
     * @param password
     */
    public SSHConnectionTest(final String ip, final String username, final String password) {
         this.ip = ip;
         this.username = username;
         this.password = password;
         stdout = new ArrayList<String>();
    }
    /**
     * 执行shell命令
     * @param command
     * @return
     */
    public int execute(final String command) {
        int returnCode = 0;
        JSch jsch = new JSch();
        MyUserInfo userInfo = new MyUserInfo();

        try {
            //创建session并且打开连接，因为创建session之后要主动打开连接
            Session session = jsch.getSession(username, ip, DEFAULT_SSH_PORT);
            session.setConfig("StrictHostKeyChecking", "no");
            session.setPassword(password);
            session.setUserInfo(userInfo);
            session.connect();

            //打开通道，设置通道类型，和执行的命令
            Channel channel = session.openChannel("exec");
            ChannelExec channelExec = (ChannelExec)channel;
            channelExec.setCommand(command);

            channelExec.setInputStream(null);
            BufferedReader input = new BufferedReader(new InputStreamReader
                    (channelExec.getInputStream()));

            channelExec.connect();
            System.out.println("The remote command is :" + command);

            //接收远程服务器执行命令的结果
            String line;
            while ((line = input.readLine()) != null) {
                stdout.add(line);
            }
            input.close();  

            // 得到returnCode
            if (channelExec.isClosed()) {
                returnCode = channelExec.getExitStatus();
            }  

            // 关闭通道
            channelExec.disconnect();
            //关闭session
            session.disconnect();

        } catch (JSchException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnCode;
    }
    /**
     * get stdout
     * @return
     */
    public ArrayList<String> getStandardOutput() {
        return stdout;
    }

    public static void main(final String [] args) {
        String password = "";
        String username = "root";
        String ip = "";
        SSHConnectionTest shell = new SSHConnectionTest(ip, username, password);

        //启动redis服务命令
        shell.execute("cd /usr/local/redis && ./redis-server redis.conf &");
        //关闭redis服务命令
//      shell.execute("cd /usr/local/redis && ./redis-cli shutdown");

        ArrayList<String> stdout = shell.getStandardOutput();
        for (String str : stdout) {
            System.out.println(str);
        }
    }
}