导入maven依赖

<dependency>
    <groupId>ch.ethz.ganymed</groupId>
    <artifactId>ganymed-ssh2</artifactId>
    <version>262</version>
</dependency>

实现类

import ch.ethz.ssh2.Connection;
import ch.ethz.ssh2.Session;

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

public class test {
    public static void main(String[] args) throws IOException {
        String host = "192.168.111.130";     //设备IP地址
        int port = 22;                       //ssh端口号
        String username = "root";            //连接用户
        String password = "123";             //密码

        // 创建连接
        Connection conn = new Connection(host, port);
        // 启动连接
        conn.connect();
        // 验证用户密码
        conn.authenticateWithPassword(username, password);
        Session session = conn.openSession();
        session.execCommand("ansible webserver -m shell -a \'w\'");    //这里放要在Linux上执行的命令

        // 消费所有输入流
        // session.getStdout()输出的是结果，但是它是以一行的形式输出，所以传递给consumeInputStream进行换行
        String inStr = consumeInputStream(session.getStdout());
        String errStr = consumeInputStream(session.getStderr());

        session.close();
        conn.close();
    }

    /**
     *   消费inputstream，并返回
     */
    public static String consumeInputStream(InputStream is) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(is));
        String s ;
        StringBuilder sb = new StringBuilder();
        while((s=br.readLine())!=null){
            System.out.println(s);
            sb.append(s);
        }
        return sb.toString();
    }
}