Java 使用 JSch 远程执行 Shell 命令

最近需要使用远程执行 Shell 命令，网上也有很多教程，但一般都是远程分发文件或者需要实现 UserInfo 接口，感觉都不够简介或者不满足我的需求。经过上网查询、翻阅官网终于发现可以实现我想要的功能了。

参考：wiki.jsch.org/index.php?M…

添加Maven依赖

<dependency>
            <groupId>com.jcraft</groupId>
            >artifactId>jsch</artifactId>
            <version>0.1.53</version>
        </dependency>

代码

package quartz;

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

import java.io.InputStream;

/**
 * Created by chenxl on 2017/5/26.
 */
public class Samplejsch {

    public static void main(String[] args) {

        try{
            JSch jsch=new JSch();

            String host=System.getProperty("user.name") + "@localhost";
            if(args.length>0){
                host=args[0];
            }
            String user=host.substring(0, host.indexOf('@'));

            host=host.substring(host.indexOf('@')+1);

            user = "chenxl";
            host = "localhost";
            Session session=jsch.getSession(user, host, 22);

            //jsch.setKnownHosts("/home/anand/.ssh/known_hosts");
            //jsch.addIdentity("/home/anand/.ssh/id_rsa");

            // If two machines have SSH passwordless logins setup, the following line is not needed:
            session.setPassword("12345678");
            session.setConfig("StrictHostKeyChecking", "no");
            session.connect();

            String command="ps -a\n";
            // command=args[1];

            Channel channel=session.openChannel("exec");
            ((ChannelExec)channel).setCommand(command);

            //channel.setInputStream(System.in);
            channel.setInputStream(null);

            ((ChannelExec)channel).setErrStream(System.err);

            InputStream in=channel.getInputStream();

            channel.connect();
            byte[] tmp=new byte[1024];
            while(true){
                while(in.available()>0){
                    int i=in.read(tmp, 0, 1024);
                    if(i<0)break;
                    System.out.print(new String(tmp, 0, i));
                }
                if(channel.isClosed()){
                    System.out.println("exit-status: "+channel.getExitStatus());
                    break;
                }
                try{Thread.sleep(1000);}catch(Exception ee) {ee.printStackTrace();}
            }
            channel.disconnect();
            session.disconnect();
        }
        catch(Exception e){
            System.out.println(e);
        }
    }       //end main

}

结果