JAVA实现远程连接SSH并执行命令 ，实时输出执行结果

package com.controller;
import java.io.BufferedReader;
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;
 
public class ssh2 {
     public static void main(String[] args) throws Exception {  
            JSch jsch = new JSch(); // 创建JSch对象  
            String userName = "root";// 用户名  
            String password = "111111";// 密码  
            String host = "192.168.3.157";// 服务器地址  
            int port = 22;// 端口号  
            String cmd = "yum install screen -y ";// 要运行的命令  
            Session session = jsch.getSession(userName, host, 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 = 60000000;  
            session.setTimeout(timeout); // 设置timeout时间  
            session.connect(); // 通过Session建立链接  
            ChannelExec channelExec = (ChannelExec) session.openChannel("exec");  
            channelExec.setCommand(cmd);  
            channelExec.setInputStream(null);  
            channelExec.setErrStream(System.err);  
            channelExec.connect();  
            InputStream in = channelExec.getInputStream();  
            BufferedReader 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);  
                System.out.println(buf);// 打印控制台输出  
            }  
            reader.close();  
            channelExec.disconnect();  
            if (null != session) {  
                session.disconnect();  
            }  
        }  
}

需要导入的依赖
<dependency>
  <groupId>com.jcraft</groupId>
  <artifactId>jsch</artifactId>
  <version>0.1.55</version>
</dependency>