xshell 获取远程linux服务器 cpu、磁盘、内存

package com.sinosoft.common.utils;

import com.jcraft.jsch.*;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @Author zyq
 * @Date 2020/5/29
 * @Description: 获取远程linux服务器 cpu、磁盘、内存
 */
public class LinuxStateForShell {

    public static final String CPU_MEM_SHELL = "top -b -n 1";
        public static final String FILES_SHELL = "df -hl";
    public static final String[] COMMANDS = {CPU_MEM_SHELL, FILES_SHELL};
    public static final String LINE_SEPARATOR = System.getProperty("line.separator");
    private static Session session;

    /**
     * 连接到指定的HOST
     *
     * @return isConnect
     * @throws JSchException JSchException
     */
    private static boolean connect(String user, String passwd, String host) {
        JSch jsch = new JSch();
        try {
            session = jsch.getSession(user, host, 22);
            session.setPassword(passwd);

            java.util.Properties config = new java.util.Properties();
            config.put("StrictHostKeyChecking", "no");
            session.setConfig(config);

            session.connect();
        } catch (JSchException e) {
            e.printStackTrace();
            System.out.println("connect error !");
            return false;
        }
        return true;
    }

    /**
     * 远程连接Linux 服务器 执行相关的命令
     *
     * @param commands 执行的脚本
     * @param user     远程连接的用户名
     * @param passwd   远程连接的密码
     * @param host     远程连接的主机IP
     * @return 最终命令返回信息
     */
    public static Map runDistanceShell(String[] commands, String user, String passwd, String host) {
        if (!connect(user, passwd, host)) {
            return null;
        }
        Map map = new HashMap<>();
        StringBuilder stringBuffer;

        BufferedReader reader = null;
        Channel channel = null;
        try {
            for (String command : commands) {
                stringBuffer = new StringBuilder();
                channel = session.openChannel("exec");
                ((ChannelExec) channel).setCommand(command);

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

                channel.connect();
                InputStream in = channel.getInputStream();
                reader = new BufferedReader(new InputStreamReader(in));
                String buf;
                while ((buf = reader.readLine()) != null) {

                    //舍弃PID 进程信息
                    if (buf.contains("PID")) {
                        break;
                    }
                    stringBuffer.append(buf.trim()).append(LINE_SEPARATOR);
                }
                //每个命令存储自己返回数据-用于后续对返回数据进行处理
                map.put(command, stringBuffer.toString());
            }
        } catch (IOException | JSchException e) {
            e.printStackTrace();
        } finally