获取依赖包hyperic

链接：https://pan.baidu.com/s/1EFTvC-lnjgRtdtLumiAHOQ
提取码：qnms

1. 将hyperic-sigar-1.6.4.zip解压
2. 将hyperic-sigar-1.6.4\sigar-bin\lib下的sigar.jar打包到maven仓库
3. 将sigar-amd64-winnt.dll放到jdk的bin目录
   打包命令

mvn install:install-file -Dfile=sigar.jar -DgroupId=org.hyperic.sigar -DartifactId=hyperic -Dversion=1.0 -Dpackaging=jar

引入依赖

		<dependency>
			<groupId>org.hyperic.sigar</groupId>
			<artifactId>hyperic</artifactId>
			<version>1.0</version>
		</dependency>

编写工具类

获取系统内存占比，cpu使用率，磁盘占比

severInfo.java

import java.io.*;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;

import org.hyperic.sigar.FileSystem;
import org.hyperic.sigar.FileSystemUsage;
import org.hyperic.sigar.Mem;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarException;

public class serverInfo {
    private static String osName = System.getProperty("os.name");

    /*获取内存*/
    public static String readRAM() {
        Sigar sigar = new Sigar();
        //获取内存
        try {
            Mem mem = sigar.getMem();
            int memTotal = (int) Math.ceil((double) mem.getTotal() / (1024L * 1024L * 1024L));
            String memFree = String.format("%.1f", (double) mem.getFree() / (1024L * 1024L * 1024L));
            String memUser = String.format("%.0f", (memTotal - Double.parseDouble(memFree)) / memTotal * 100);
            System.out.println("内存总量:" + memTotal + "G");
            System.out.println("内存剩余量:" + memFree + "G");
            System.out.println("内存使用率:" + memUser + "%");
            return memUser;
        } catch (SigarException e1) {
            e1.printStackTrace();
        }
        return "";
    }

    //获取磁盘信息
    public static String readDisk() {
        Sigar sigar = new Sigar();
        //获取硬盘
        Long ypTotal = 0L;
        Long ypfree = 0L;
        try {
            FileSystem fslist[] = sigar.getFileSystemList();
            for (int i = 0; i < fslist.length; i++) {
                FileSystem fs = fslist[i];
                FileSystemUsage usage = null;
                usage = sigar.getFileSystemUsage(fs.getDirName());
                switch (fs.getType()) {
                    case 0: // TYPE_UNKNOWN ：未知
                        break;
                    case 1: // TYPE_NONE
                        break;
                    case 2: // TYPE_LOCAL_DISK : 本地硬盘
                        // 文件系统总大小
                        ypTotal += usage.getTotal();
                        ypfree += usage.getFree();
                        break;
                    case 3:// TYPE_NETWORK ：网络
                        break;
                    case 4:// TYPE_RAM_DISK ：闪存
                        break;
                    case 5:// TYPE_CDROM ：光驱
                        break;
                    case 6:// TYPE_SWAP ：页面交换
                        break;
                }
            }
            int hdTotal = (int) ((double) ypTotal / (1024L * 1024L));
            String hdfree = String.format("%.1f", (double) ypfree / (1024L * 1024L));
            String hdUser = String.format("%.0f", (hdTotal - Double.parseDouble(hdfree)) / hdTotal * 100);
            System.out.println("硬盘总量:" + hdTotal + "G");
            System.out.println("硬盘剩余量:" + hdfree + "G");
            System.out.println("硬盘使用率:" + hdUser + "%");
            return hdUser;
        } catch (SigarException e1) {
            e1.printStackTrace();
        }
        return null;
    }

    //获取windows系统cpu使用率
    public static double getCpuRatioForWindows() {
        try {
            String procCmd = System.getenv("windir")
                    + "//system32//wbem//wmic.exe process get Caption,CommandLine,"
                    + "KernelModeTime,ReadOperationCount,ThreadCount,UserModeTime,WriteOperationCount";
            // 取进程信息
            long[] c0 = readCpu(Runtime.getRuntime().exec(procCmd));
            Thread.sleep(500);
            long[] c1 = readCpu(Runtime.getRuntime().exec(procCmd));
            if (c0 != null && c1 != null) {
                long idletime = c1[0] - c0[0];
                long busytime = c1[1] - c0[1];
                return Double.valueOf(100 * (busytime) / (busytime + idletime)).doubleValue();
            } else {
                return 0.0;
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            return 0.0;
        }
    }

    //获取windows系统cpu信息
    private static long[] readCpu(final Process proc) {
        long[] retn = new long[2];
        try {
            proc.getOutputStream().close();
            InputStreamReader ir = new InputStreamReader(proc.getInputStream(), "gbk");
            LineNumberReader input = new LineNumberReader(ir);
            String line = input.readLine();
            if (line == null || line.length() < 10) {
                return null;
            }
            int capidx = line.indexOf("Caption");
            int cmdidx = line.indexOf("CommandLine");
            int rocidx = line.indexOf("ReadOperationCount");
            int umtidx = line.indexOf("UserModeTime");
            int kmtidx = line.indexOf("KernelModeTime");
            int wocidx = line.indexOf("WriteOperationCount");
            long idletime = 0;
            long kneltime = 0;
            long usertime = 0;
            while ((line = input.readLine()) != null) {
                if (line.length() < wocidx) {
                    continue;
                }
                // 字段出现顺序：Caption,CommandLine,KernelModeTime,ReadOperationCount,
                // ThreadCount,UserModeTime,WriteOperation
                String caption = Bytes.substring(line, capidx, cmdidx - 1).trim();
                String cmd = Bytes.substring(line, cmdidx, kmtidx - 1).trim();
                if (cmd.indexOf("wmic.exe") >= 0) {
                    continue;
                }
                // log.info("line="+line);
                if (caption.equals("System Idle Process") || caption.equals("System")) {
                    idletime += Long.valueOf(Bytes.substring(line, kmtidx, rocidx - 1).trim()).longValue();
                    idletime += Long.valueOf(Bytes.substring(line, umtidx, wocidx - 1).trim()).longValue();
                    continue;
                }
                kneltime += Long.valueOf(Bytes.substring(line, kmtidx, rocidx - 1).trim()).longValue();
                usertime += Long.valueOf(Bytes.substring(line, umtidx, wocidx - 1).trim()).longValue();
            }
            retn[0] = idletime;
            retn[1] = kneltime + usertime;
            return retn;
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            try {
                proc.getInputStream().close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    public static class Bytes {
        /** */
        /**
         * 由于String.subString对汉字处理存在问题（把一个汉字视为一个字节)，因此在
         * 包含汉字的字符串时存在隐患，现调整如下：
         *
         * @param src       要截取的字符串
         * @param start_idx 开始坐标（包括该坐标)
         * @param end_idx   截止坐标（包括该坐标）
         * @return
         * @throws UnsupportedEncodingException
         */
        public static String substring(String src, int start_idx, int end_idx) throws UnsupportedEncodingException {
            byte[] b = src.getBytes();
            String tgt = "";
            for (int i = start_idx; i <= end_idx; i++) {
                tgt += (char) b[i];
            }
            return tgt;
        }
    }
//-----------------系统分割线------------------------

    /**
     * 功能：获取Linux系统cpu使用率
     */
    public static int cpuUsage() {
        try {
            Map<?, ?> map1 = cpuinfo();
            Thread.sleep(500);
            Map<?, ?> map2 = cpuinfo();
            if (map1.size() > 0 && map2.size() > 0) {
                long user1 = Long.parseLong(map1.get("user").toString());
                long nice1 = Long.parseLong(map1.get("nice").toString());
                long system1 = Long.parseLong(map1.get("system").toString());
                long idle1 = Long.parseLong(map1.get("idle").toString());

                long user2 = Long.parseLong(map2.get("user").toString());
                long nice2 = Long.parseLong(map2.get("nice").toString());
                long system2 = Long.parseLong(map2.get("system").toString());
                long idle2 = Long.parseLong(map2.get("idle").toString());

                long total1 = user1 + system1 + nice1;
                long total2 = user2 + system2 + nice2;
                float total = total2 - total1;

                long totalIdle1 = user1 + nice1 + system1 + idle1;
                long totalIdle2 = user2 + nice2 + system2 + idle2;
                float totalidle = totalIdle2 - totalIdle1;

                float cpusage = (total / totalidle) * 100;
                return (int) cpusage;
            }

        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return 0;
    }

    /**
     * 功能：CPU使用信息
     */
    public static Map<?, ?> cpuinfo() {
        InputStreamReader inputs = null;
        BufferedReader buffer = null;
        Map<String, Object> map = new HashMap<String, Object>();
        try {
            inputs = new InputStreamReader(new FileInputStream("/proc/stat"));
            buffer = new BufferedReader(inputs);
            String line = "";
            while (true) {
                line = buffer.readLine();
                if (line == null) {
                    break;
                }
                if (line.startsWith("cpu")) {
                    StringTokenizer tokenizer = new StringTokenizer(line);
                    List<String> temp = new ArrayList<String>();
                    while (tokenizer.hasMoreElements()) {
                        String value = tokenizer.nextToken();
                        temp.add(value);
                    }
                    map.put("user", temp.get(1));
                    map.put("nice", temp.get(2));
                    map.put("system", temp.get(3));
                    map.put("idle", temp.get(4));
                    map.put("iowait", temp.get(5));
                    map.put("irq", temp.get(6));
                    map.put("softirq", temp.get(7));
                    map.put("stealstolen", temp.get(8));
                    break;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (buffer != null && inputs != null) {
                    buffer.close();
                    inputs.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return map;
    }

    /**
     * Linux 得到磁盘的使用率
     *
     * @return
     * @throws Exception
     */
    public static int getDiskUsage() throws Exception {
        double totalHD = 0;
        double usedHD = 0;
        Runtime rt = Runtime.getRuntime();
        Process p = rt.exec("df -hl");// df -hl 查看硬盘空间
        BufferedReader in = null;
        try {
            in = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String str = null;
            String[] strArray = null;
            while ((str = in.readLine()) != null) {
                int m = 0;
                strArray = str.split(" ");
                for (String tmp : strArray) {
                    if (tmp.trim().length() == 0)
                        continue;
                    ++m;
                    if (tmp.indexOf("G") != -1) {
                        if (m == 2) {
                            if (!tmp.equals("") && !tmp.equals("0"))
                                totalHD += Double.parseDouble(tmp.substring(0, tmp.length() - 1)) * 1024;
                        }
                        if (m == 3) {
                            if (!tmp.equals("none") && !tmp.equals("0"))
                                usedHD += Double.parseDouble(tmp.substring(0, tmp.length() - 1)) * 1024;
                        }
                    }
                    if (tmp.indexOf("M") != -1) {
                        if (m == 2) {
                            if (!tmp.equals("") && !tmp.equals("0"))
                                totalHD += Double.parseDouble(tmp.substring(0, tmp.length() - 1));
                        }
                        if (m == 3) {
                            if (!tmp.equals("none") && !tmp.equals("0"))
                                usedHD += Double.parseDouble(tmp.substring(0, tmp.length() - 1));
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            in.close();
        }
// 保留2位小数
        double precent = (usedHD / totalHD) * 100;
        return (int) precent;

    }

    /**
     * 功能：内存使用率
     */
    public static int memoryUsage() {
        Map<String, Object> map = new HashMap<String, Object>();
        InputStreamReader inputs = null;
        BufferedReader buffer = null;
        try {
            inputs = new InputStreamReader(new FileInputStream("/proc/meminfo"));
            buffer = new BufferedReader(inputs);
            String line = "";
            while (true) {
                line = buffer.readLine();
                if (line == null)
                    break;
                int beginIndex = 0;
                int endIndex = line.indexOf(":");
                if (endIndex != -1) {
                    String key = line.substring(beginIndex, endIndex);
                    beginIndex = endIndex + 1;
                    endIndex = line.length();
                    String memory = line.substring(beginIndex, endIndex);
                    String value = memory.replace("kB", "").trim();
                    map.put(key, value);
                }
            }

            long memTotal = Long.parseLong(map.get("MemTotal").toString());
            long memFree = Long.parseLong(map.get("MemFree").toString());
            long memused = memTotal - memFree;
            long buffers = Long.parseLong(map.get("Buffers").toString());
            long cached = Long.parseLong(map.get("Cached").toString());

            double usage = (double) (memused - buffers - cached) / memTotal * 100;
            return (int) usage;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                buffer.close();
                inputs.close();
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return 0;
    }
}

SSH工具类

引入依赖

		<dependency>
			<groupId>ch.ethz.ganymed</groupId>
			<artifactId>ganymed-ssh2</artifactId>
			<version>262</version>
		</dependency>
		<dependency>
			<groupId>cn.hutool</groupId>
			<artifactId>hutool-all</artifactId>
			<version>5.7.2</version>
		</dependency>

配置文件

path.properties

sshpathIP=ip地址
sshpathUsername=用户名
sshpathPassword=密码

工具类

SshUtil.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.Calendar;
import java.util.StringTokenizer;

import cn.hutool.setting.dialect.Props;
import org.apache.commons.lang3.StringUtils;

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



public class SshUtil {
    static Props props = new Props("path.properties");
    private static String DEFAULT_CHAR_SET = "UTF-8";
    private static String tipStr = "=======================%s=======================";
    private static String splitStr = "=====================================================";

    private static String sship=props.getProperty("sshpathIP");
    private static String sshusername=props.getProperty("sshpathUsername");
    private static String sshpassword=props.getProperty("sshpathPassword");
    /**
     * 登录主机
     * @return
     *      登录成功返回true，否则返回false
     */
    public static Connection login(){
        boolean isAuthenticated = false;
        Connection conn = null;
        long startTime = Calendar.getInstance().getTimeInMillis();
        try {
            conn = new Connection(sship);
            conn.connect(); // 连接主机

            isAuthenticated = conn.authenticateWithPassword(sshusername, sshpassword); // 认证
            if(isAuthenticated){
                System.out.println(String.format(tipStr, "认证成功"));
            } else {
                System.out.println(String.format(tipStr, "认证失败"));
            }
        } catch (IOException e) {
            System.err.println(String.format(tipStr, "登录失败"));
            e.printStackTrace();
        }
        long endTime = Calendar.getInstance().getTimeInMillis();
        System.out.println("登录用时: " + (endTime - startTime)/1000.0 + "s\n" + splitStr);
        return conn;
    }

    /**
     * 远程执行shell脚本或者命令
     * @param cmd
     *      即将执行的命令
     * @return
     *      命令执行完后返回的结果值
     */
    public static String execute(Connection conn, String cmd){
        String result = "";
        Session session = null;
        try {
            if(conn != null){
                session = conn.openSession();  // 打开一个会话
                session.execCommand(cmd);      // 执行命令
                result = processStdout(session.getStdout(), DEFAULT_CHAR_SET);

                //如果为得到标准输出为空，说明脚本执行出错了
                if(StringUtils.isBlank(result)){
                    System.err.println("【得到标准输出为空】\n执行的命令如下：\n" + cmd);
                    result = processStdout(session.getStderr(), DEFAULT_CHAR_SET);
                }else{
                    System.out.println("【执行命令成功】\n执行的命令如下：\n" + cmd);
                }
            }
        } catch (IOException e) {
            System.err.println("【执行命令失败】\n执行的命令如下：\n" + cmd + "\n" + e.getMessage());
            e.printStackTrace();
        }
  	StringTokenizer pas = new StringTokenizer(result, " ");
        result = "";
        while (pas.hasMoreTokens()) {
            String s = pas.nextToken();
            result = result + s + " ";
        }
        result = result.trim();
        StringBuffer str = new StringBuffer(result);
        result = replaceSpace(str);
        return result;
    }

    /**
     * 解析脚本执行返回的结果集
     * @param in 输入流对象
     * @param charset 编码
     * @return
     *       以纯文本的格式返回
     */
    private static String processStdout(InputStream in, String charset){
        InputStream stdout = new StreamGobbler(in);
        StringBuffer buffer = new StringBuffer();
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(stdout, charset));
            String line = null;
            while((line = br.readLine()) != null){
                buffer.append(line + "\n");
            }
        } catch (UnsupportedEncodingException e) {
            System.err.println("解析脚本出错：" + e.getMessage());
            e.printStackTrace();
        } catch (IOException e) {
            System.err.println("解析脚本出错：" + e.getMessage());
            e.printStackTrace();
        }
        return buffer.toString();
    }
//将空格替换成‘;’
public static String replaceSpace(StringBuffer str) {
        return str.toString().replaceAll("\\s", ";");
    }
}

监控某服务

监控mysql服务

思路：根据Linux的命令可以获得进程，根据进程去获取mysql的使用情况

测试

/*数据库服务*/
    public static String mysqlUsagerate() {
        /*获取mysql的pid*/
        Connection root = null;
        try {
            String pid = "";
            root = SshUtil.login();//通过ssh连接到服务器
            String execute = SshUtil.execute(root, "netstat -ntpl|grep mysql");//执行命令
            
            //以下是我业务逻辑 可忽略
            if (!"".equals(execute)) {
                String[] executes = execute.split(";");
                for (int i = 0; i < executes.length; i++) {
                    if (i == 6) {
                        pid = executes[i].split("/")[0];
                    }
                }
                if (!"".equals(pid)) {
                    execute = SshUtil.execute(root, "ps -aux |grep " + pid);//根据pid进程获取状态信息
                    String[] Usagerates = execute.split(";");
                    for (int i = 0; i < Usagerates.length; i++) {
                        if (i == 3) {
                            return Usagerates[i];
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (root != null) {
                root.close();
            }
        }
        return null;
    }

sigar的一些使用方法

 
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Map;
import java.util.Properties;
import org.hyperic.sigar.CpuInfo;
import org.hyperic.sigar.CpuPerc;
import org.hyperic.sigar.FileSystem;
import org.hyperic.sigar.FileSystemUsage;
import org.hyperic.sigar.Mem;
import org.hyperic.sigar.NetFlags;
import org.hyperic.sigar.NetInterfaceConfig;
import org.hyperic.sigar.NetInterfaceStat;
import org.hyperic.sigar.OperatingSystem;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarException;
import org.hyperic.sigar.Swap;
import org.hyperic.sigar.Who;
 
public class SysListener {
    public static void main(String[] args) {
        try {
            // System信息，从jvm获取
            property();
            System.out.println("----------------------------------");
            // cpu信息
            cpu();
            System.out.println("----------------------------------");
            // 内存信息
            memory();
            System.out.println("----------------------------------");
            // 操作系统信息
            os();
            System.out.println("----------------------------------");
            // 用户信息
            who();
            System.out.println("----------------------------------");
            // 文件系统信息
            file();
            System.out.println("----------------------------------");
            // 网络信息
            net();
            System.out.println("----------------------------------");
            // 以太网信息
            ethernet();
            System.out.println("----------------------------------");
        } catch (Exception e1) {
            e1.printStackTrace();
        }
    }
 
    private static void property() throws UnknownHostException {
        Runtime r = Runtime.getRuntime();
        Properties props = System.getProperties();
        InetAddress addr;
        addr = InetAddress.getLocalHost();
        String ip = addr.getHostAddress();
        Map<String, String> map = System.getenv();
        String userName = map.get("USERNAME");// 获取用户名
        String computerName = map.get("COMPUTERNAME");// 获取计算机名
        String userDomain = map.get("USERDOMAIN");// 获取计算机域名
        System.out.println("用户名:    " + userName);
        System.out.println("计算机名:    " + computerName);
        System.out.println("计算机域名:    " + userDomain);
        System.out.println("本地ip地址:    " + ip);
        System.out.println("本地主机名:    " + addr.getHostName());
        System.out.println("JVM可以使用的总内存:    " + r.totalMemory());
        System.out.println("JVM可以使用的剩余内存:    " + r.freeMemory());
        System.out.println("JVM可以使用的处理器个数:    " + r.availableProcessors());
        System.out.println("Java的运行环境版本：    " + props.getProperty("java.version"));
        System.out.println("Java的运行环境供应商：    " + props.getProperty("java.vendor"));
        System.out.println("Java供应商的URL：    " + props.getProperty("java.vendor.url"));
        System.out.println("Java的安装路径：    " + props.getProperty("java.home"));
        System.out.println("Java的虚拟机规范版本：    " + props.getProperty("java.vm.specification.version"));
        System.out.println("Java的虚拟机规范供应商：    " + props.getProperty("java.vm.specification.vendor"));
        System.out.println("Java的虚拟机规范名称：    " + props.getProperty("java.vm.specification.name"));
        System.out.println("Java的虚拟机实现版本：    " + props.getProperty("java.vm.version"));
        System.out.println("Java的虚拟机实现供应商：    " + props.getProperty("java.vm.vendor"));
        System.out.println("Java的虚拟机实现名称：    " + props.getProperty("java.vm.name"));
        System.out.println("Java运行时环境规范版本：    " + props.getProperty("java.specification.version"));
        System.out.println("Java运行时环境规范供应商：    " + props.getProperty("java.specification.vender"));
        System.out.println("Java运行时环境规范名称：    " + props.getProperty("java.specification.name"));
        System.out.println("Java的类格式版本号：    " + props.getProperty("java.class.version"));
        System.out.println("Java的类路径：    " + props.getProperty("java.class.path"));
        System.out.println("加载库时搜索的路径列表：    " + props.getProperty("java.library.path"));
        System.out.println("默认的临时文件路径：    " + props.getProperty("java.io.tmpdir"));
        System.out.println("一个或多个扩展目录的路径：    " + props.getProperty("java.ext.dirs"));
        System.out.println("操作系统的名称：    " + props.getProperty("os.name"));
        System.out.println("操作系统的构架：    " + props.getProperty("os.arch"));
        System.out.println("操作系统的版本：    " + props.getProperty("os.version"));
        System.out.println("文件分隔符：    " + props.getProperty("file.separator"));
        System.out.println("路径分隔符：    " + props.getProperty("path.separator"));
        System.out.println("行分隔符：    " + props.getProperty("line.separator"));
        System.out.println("用户的账户名称：    " + props.getProperty("user.name"));
        System.out.println("用户的主目录：    " + props.getProperty("user.home"));
        System.out.println("用户的当前工作目录：    " + props.getProperty("user.dir"));
    }
 
    private static void memory() throws SigarException {
        Sigar sigar = new Sigar();
        Mem mem = sigar.getMem();
        // 内存总量
        System.out.println("内存总量:    " + mem.getTotal() / 1024L + "K av");
        // 当前内存使用量
        System.out.println("当前内存使用量:    " + mem.getUsed() / 1024L + "K used");
        // 当前内存剩余量
        System.out.println("当前内存剩余量:    " + mem.getFree() / 1024L + "K free");
        Swap swap = sigar.getSwap();
        // 交换区总量
        System.out.println("交换区总量:    " + swap.getTotal() / 1024L + "K av");
        // 当前交换区使用量
        System.out.println("当前交换区使用量:    " + swap.getUsed() / 1024L + "K used");
        // 当前交换区剩余量
        System.out.println("当前交换区剩余量:    " + swap.getFree() / 1024L + "K free");
    }
 
    private static void cpu() throws SigarException {
        Sigar sigar = new Sigar();
        CpuInfo infos[] = sigar.getCpuInfoList();
        CpuPerc cpuList[] = null;
        cpuList = sigar.getCpuPercList();
        for (int i = 0; i < infos.length; i++) {// 不管是单块CPU还是多CPU都适用
            CpuInfo info = infos[i];
            System.out.println("第" + (i + 1) + "块CPU信息");
            System.out.println("CPU的总量MHz:    " + info.getMhz());// CPU的总量MHz
            System.out.println("CPU生产商:    " + info.getVendor());// 获得CPU的卖主，如：Intel
            System.out.println("CPU类别:    " + info.getModel());// 获得CPU的类别，如：Celeron
            System.out.println("CPU缓存数量:    " + info.getCacheSize());// 缓冲存储器数量
            printCpuPerc(cpuList[i]);
        }
    }
    private static void printCpuPerc(CpuPerc cpu) {
        System.out.println("CPU用户使用率:    " + CpuPerc.format(cpu.getUser()));// 用户使用率
        System.out.println("CPU系统使用率:    " + CpuPerc.format(cpu.getSys()));// 系统使用率
        System.out.println("CPU当前等待率:    " + CpuPerc.format(cpu.getWait()));// 当前等待率
        System.out.println("CPU当前错误率:    " + CpuPerc.format(cpu.getNice()));//
        System.out.println("CPU当前空闲率:    " + CpuPerc.format(cpu.getIdle()));// 当前空闲率
        System.out.println("CPU总的使用率:    " + CpuPerc.format(cpu.getCombined()));// 总的使用率
    }
    private static void os() {
        OperatingSystem OS = OperatingSystem.getInstance();
        // 操作系统内核类型如： 386、486、586等x86
        System.out.println("操作系统:    " + OS.getArch());
        System.out.println("操作系统CpuEndian():    " + OS.getCpuEndian());//
        System.out.println("操作系统DataModel():    " + OS.getDataModel());//
        // 系统描述
        System.out.println("操作系统的描述:    " + OS.getDescription());
        // 操作系统类型
        // System.out.println("OS.getName():    " + OS.getName());
        // System.out.println("OS.getPatchLevel():    " + OS.getPatchLevel());//
        // 操作系统的卖主
        System.out.println("操作系统的卖主:    " + OS.getVendor());
        // 卖主名称
        System.out.println("操作系统的卖主名:    " + OS.getVendorCodeName());
        // 操作系统名称
        System.out.println("操作系统名称:    " + OS.getVendorName());
        // 操作系统卖主类型
        System.out.println("操作系统卖主类型:    " + OS.getVendorVersion());
        // 操作系统的版本号
        System.out.println("操作系统的版本号:    " + OS.getVersion());
    }
    private static void who() throws SigarException {
        Sigar sigar = new Sigar();
        Who who[] = sigar.getWhoList();
        if (who != null && who.length > 0) {
            for (int i = 0; i < who.length; i++) {
                // System.out.println("当前系统进程表中的用户名" + String.valueOf(i));
                Who _who = who[i];
                System.out.println("用户控制台:    " + _who.getDevice());
                System.out.println("用户host:    " + _who.getHost());
                // System.out.println("getTime():    " + _who.getTime());
                // 当前系统进程表中的用户名
                System.out.println("当前系统进程表中的用户名:    " + _who.getUser());
            }
        }
    }
    
    private static void file() throws Exception {
        Sigar sigar = new Sigar();
        FileSystem fslist[] = sigar.getFileSystemList();
        for (int i = 0; i < fslist.length; i++) {
            System.out.println("分区的盘符名称" + i);
            FileSystem fs = fslist[i];
            // 分区的盘符名称
            System.out.println("盘符名称:    " + fs.getDevName());
            // 分区的盘符名称
            System.out.println("盘符路径:    " + fs.getDirName());
            System.out.println("盘符标志:    " + fs.getFlags());//
            // 文件系统类型，比如 FAT32、NTFS
            System.out.println("盘符类型:    " + fs.getSysTypeName());
            // 文件系统类型名，比如本地硬盘、光驱、网络文件系统等
            System.out.println("盘符类型名:    " + fs.getTypeName());
            // 文件系统类型
            System.out.println("盘符文件系统类型:    " + fs.getType());
            FileSystemUsage usage = null;
            switch (fs.getType()) {
            case 0: // TYPE_UNKNOWN ：未知
                break;
            case 1: // TYPE_NONE
                break;
            case 2: // TYPE_LOCAL_DISK : 本地硬盘
                // 文件系统总大小
             usage = sigar.getFileSystemUsage(fs.getDirName());
                System.out.println(fs.getDevName() + "总大小:    " + usage.getTotal() + "KB");
                // 文件系统剩余大小
                System.out.println(fs.getDevName() + "剩余大小:    " + usage.getFree() + "KB");
                // 文件系统可用大小
                System.out.println(fs.getDevName() + "可用大小:    " + usage.getAvail() + "KB");
                // 文件系统已经使用量
                System.out.println(fs.getDevName() + "已经使用量:    " + usage.getUsed() + "KB");
                double usePercent = usage.getUsePercent() * 100D;
                // 文件系统资源的利用率
                System.out.println(fs.getDevName() + "资源的利用率:    " + usePercent + "%");
                System.out.println(fs.getDevName() + "读出：    " + usage.getDiskReads());
                System.out.println(fs.getDevName() + "写入：    " + usage.getDiskWrites());
                break;
            case 3:// TYPE_NETWORK ：网络
                break;
            case 4:// TYPE_RAM_DISK ：闪存
                break;
            case 5:// TYPE_CDROM ：光驱
                break;
            case 6:// TYPE_SWAP ：页面交换
                break;
            }
            
        }
        return;
    }
    private static void net() throws Exception {
        Sigar sigar = new Sigar();
        String ifNames[] = sigar.getNetInterfaceList();
        for (int i = 0; i < ifNames.length; i++) {
            String name = ifNames[i];
            NetInterfaceConfig ifconfig = sigar.getNetInterfaceConfig(name);
            System.out.println("网络设备名:    " + name);// 网络设备名
            System.out.println("IP地址:    " + ifconfig.getAddress());// IP地址
            System.out.println("子网掩码:    " + ifconfig.getNetmask());// 子网掩码
            if ((ifconfig.getFlags() & 1L) <= 0L) {
                System.out.println("!IFF_UP...skipping getNetInterfaceStat");
                continue;
            }
            NetInterfaceStat ifstat = sigar.getNetInterfaceStat(name);
            System.out.println(name + "接收的总包裹数:" + ifstat.getRxPackets());// 接收的总包裹数
            System.out.println(name + "发送的总包裹数:" + ifstat.getTxPackets());// 发送的总包裹数
            System.out.println(name + "接收到的总字节数:" + ifstat.getRxBytes());// 接收到的总字节数
            System.out.println(name + "发送的总字节数:" + ifstat.getTxBytes());// 发送的总字节数
            System.out.println(name + "接收到的错误包数:" + ifstat.getRxErrors());// 接收到的错误包数
            System.out.println(name + "发送数据包时的错误数:" + ifstat.getTxErrors());// 发送数据包时的错误数
            System.out.println(name + "接收时丢弃的包数:" + ifstat.getRxDropped());// 接收时丢弃的包数
            System.out.println(name + "发送时丢弃的包数:" + ifstat.getTxDropped());// 发送时丢弃的包数
        }
    }
    private static void ethernet() throws SigarException {
        Sigar sigar = null;
        sigar = new Sigar();
        String[] ifaces = sigar.getNetInterfaceList();
        for (int i = 0; i < ifaces.length; i++) {
            NetInterfaceConfig cfg = sigar.getNetInterfaceConfig(ifaces[i]);
            if (NetFlags.LOOPBACK_ADDRESS.equals(cfg.getAddress()) || (cfg.getFlags() & NetFlags.IFF_LOOPBACK) != 0
                    || NetFlags.NULL_HWADDR.equals(cfg.getHwaddr())) {
                continue;
            }
            System.out.println(cfg.getName() + "IP地址:" + cfg.getAddress());// IP地址
            System.out.println(cfg.getName() + "网关广播地址:" + cfg.getBroadcast());// 网关广播地址
            System.out.println(cfg.getName() + "网卡MAC地址:" + cfg.getHwaddr());// 网卡MAC地址
            System.out.println(cfg.getName() + "子网掩码:" + cfg.getNetmask());// 子网掩码
            System.out.println(cfg.getName() + "网卡描述信息:" + cfg.getDescription());// 网卡描述信息
            System.out.println(cfg.getName() + "网卡类型" + cfg.getType());//
        }
    }
}    

相关链接：
https://blog.csdn.net/DING135DING/article/details/48789531
https://blog.csdn.net/rdhj5566/article/details/54235674
https://blog.csdn.net/chuolin8358/article/details/100767213