Java如何獲取系統cpu、內存、硬盤信息

1 概述

　　前段時間摸索在Java中怎麼獲取系統信息包括cpu、內存、硬盤信息等，剛開始使用Java自帶的包進行獲取，但這樣獲取的內存信息不夠準確而且容易出現找不到相應包等錯誤，因此後面使用sigar插件進行獲取。下面列舉出了這兩種方式獲取系統信息的方式及代碼。

2 使用Java自帶包獲取系統信息

2.1 使用Java自帶包獲取系統信息代碼以下：

2.1.1 Bytes.java

public class Bytes {
    public static String substring(String src, int start_idx, int end_idx){
        byte[] b = src.getBytes();
        String tgt = "";
        for(int i=start_idx; i<=end_idx; i++){
            tgt +=(char)b[i];
        }
        return tgt;
    }
}

2.1.2 IMonitorService.java

public interface IMonitorService {
    public MonitorInfoBean getMonitorInfoBean() throws Exception;
}

 

2.1.3 MonitorInfoBean.java

public class MonitorInfoBean {
    private long totalMemory;
    private long freeMemory;
    private long maxMemory;
    private String osName;
    private long totalMemorySize;
    private long freePhysicalMemorySize;
    private long usedMemory;
    private int totalThread;
    private double cpuRatio;

    public long getFreeMemory() {
        return freeMemory;
    }

    public void setFreeMemory(long freeMemory) {
        this.freeMemory = freeMemory;
    }

    public long getFreePhysicalMemorySize() {
        return freePhysicalMemorySize;
    }

    public void setFreePhysicalMemorySize(long freePhysicalMemorySize) {
        this.freePhysicalMemorySize = freePhysicalMemorySize;
    }

    public long getMaxMemory() {
        return maxMemory;
    }

    public void setMaxMemory(long maxMemory) {
        this.maxMemory = maxMemory;
    }

    public String getOsName() {
        return osName;
    }

    public void setOsName(String osName) {
        this.osName = osName;
    }

    public long getTotalMemory() {
        return totalMemory;
    }

    public void setTotalMemory(long totalMemory) {
        this.totalMemory = totalMemory;
    }

    public long getTotalMemorySize() {
        return totalMemorySize;
    }

    public void setTotalMemorySize(long totalMemorySize) {
        this.totalMemorySize = totalMemorySize;
    }

    public int getTotalThread() {
        return totalThread;
    }

    public void setTotalThread(int totalThread) {
        this.totalThread = totalThread;
    }

    public long getUsedMemory() {
        return usedMemory;
    }

    public void setUsedMemory(long usedMemory) {
        this.usedMemory = usedMemory;
    }

    public double getCpuRatio() {
        return cpuRatio;
    }

    public void setCpuRatio(double cpuRatio) {
        this.cpuRatio = cpuRatio;
    }
}

2.1.4

import java.io.InputStreamReader;
import java.io.LineNumberReader;

//import sun.management.ManagementFactory;
//import com.sun.management.OperatingSystemMXBean;
import java.io.*;
import java.lang.management.ManagementFactory;
import java.util.StringTokenizer;

public class MonitorServiceImpl implements IMonitorService {
    private static final int CPUTIME = 30;
    private static final int PERCENT = 100;
    private static final int FAULTLENGTH = 10;
    private static final File versionFile = new File("/proc/version");
    private static String linuxVersion = null;

    public MonitorInfoBean getMonitorInfoBean() throws Exception {
        int kb = 1024;
        long totalMemory = Runtime.getRuntime().totalMemory() / kb;
        long freeMemory = Runtime.getRuntime().freeMemory() / kb;
        long maxMemory = Runtime.getRuntime().maxMemory() / kb;

        // OperatingSystemMXBean osmxb = (OperatingSystemMXBean)
        // ManagementFactory
        // .getOperatingSystemMXBean();
        // String osName = System.getProperty("os.name");
        // long totalMemorySize = osmxb.getTotalPhysicalMemorySize() / kb;
        // long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize() / kb;
        // long usedMemory = (osmxb.getTotalPhysicalMemorySize() - osmxb
        // .getFreePhysicalMemorySize()) / kb;

        ThreadGroup parentThread;
        for (parentThread = Thread.currentThread().getThreadGroup(); parentThread.getParent() != null; parentThread = parentThread.getParent());
        int totalThread = parentThread.activeCount();
        double cpuRatio = 0;

        // if (osName.toLowerCase().startsWith("windows")) {
        // cpuRatio = this.getCpuRatioForWindows();
        // } else {
        // cpuRatio = this.getCpuRateForLinux();
        // }

        MonitorInfoBean infoBean = new MonitorInfoBean();
        infoBean.setFreeMemory(freeMemory);
        // infoBean.setFreePhysicalMemorySize(freePhysicalMemorySize);
        infoBean.setMaxMemory(maxMemory);
        // infoBean.setOsName(osName);
        infoBean.setTotalMemory(totalMemory);
        // infoBean.setTotalMemorySize(totalMemorySize);
        infoBean.setTotalThread(totalThread);
        // infoBean.setUsedMemory(usedMemory);
        infoBean.setCpuRatio(cpuRatio);
        return infoBean;
    }

    private static double getCpuRateForLinux() {
        InputStream is = null;
        InputStreamReader isr = null;
        BufferedReader brStat = null;
        StringTokenizer tokenStat = null;
        try {

            System.out.println("Get usage rate of CUP , linux version: " + linuxVersion);

            Process process = Runtime.getRuntime().exec("top -b -n 1");
            is = process.getInputStream();
            isr = new InputStreamReader(is);
            brStat = new BufferedReader(isr);

            if (linuxVersion.equals("2.4")) {
                brStat.readLine();
                brStat.readLine();
                brStat.readLine();
                brStat.readLine();
                tokenStat = new StringTokenizer(brStat.readLine());
                tokenStat.nextToken();
                tokenStat.nextToken();

                String user = tokenStat.nextToken();

                tokenStat.nextToken();
                String system = tokenStat.nextToken();
                tokenStat.nextToken();
                String nice = tokenStat.nextToken();
                System.out.println(user + " , " + system + " , " + nice);
                user = user.substring(0, user.indexOf("%"));
                system = system.substring(0, system.indexOf("%"));
                nice = nice.substring(0, nice.indexOf("%"));
                float userUsage = new Float(user).floatValue();
                float systemUsage = new Float(system).floatValue();
                float niceUsage = new Float(nice).floatValue();

                return (userUsage + systemUsage + niceUsage) / 100;

            } else {
                brStat.readLine();
                brStat.readLine();
                tokenStat = new StringTokenizer(brStat.readLine());
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                tokenStat.nextToken();
                String cpuUsage = tokenStat.nextToken();
                System.out.println("CPU idle : " + cpuUsage);
                Float usage = new Float(cpuUsage.substring(0, cpuUsage.indexOf("%")));
                return (1 - usage.floatValue() / 100);
            }
        } catch (IOException ioe) {
            System.out.println(ioe.getMessage());
            freeResource(is, isr, brStat);
            return 1;
        } finally {
            freeResource(is, isr, brStat);
        }
    }

    private static void freeResource(InputStream is, InputStreamReader isr, BufferedReader br) {
        try {
            if (is != null)
                is.close();
            if (isr != null)
                isr.close();
            if (br != null)
                br.close();
        } catch (IOException ioe) {
            System.out.println(ioe.getMessage());
        }
    }

    private double getCpuRatioForWindows() {
        try {
            String procCmd = System.getenv("windir")
                    + "\\system32\\wbem\\wmic.exe process get Caption,CommandLine,"
                    + "KernelModeTime,ReadOperationCount,ThreadCount,UserModeTime,WriteOperationCount";
            long[] c0 = readCpu(Runtime.getRuntime().exec(procCmd));
            Thread.sleep(CPUTIME);
            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(
                        PERCENT * (busytime) / (busytime + idletime)).doubleValue();
            } else {
                return 0.0;
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            return 0.0;
        }
    }

    private long[] readCpu(final Process proc) {

        long[] retn = new long[2];
        try {
            proc.getOutputStream().close();
            InputStreamReader ir = new InputStreamReader(proc.getInputStream());
            LineNumberReader input = new LineNumberReader(ir);
            String line = input.readLine();

            if (line == null || line.length() < FAULTLENGTH) {
                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;
                }

                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 void main(String[] args) throws Exception {
        IMonitorService service = new MonitorServiceImpl();
        MonitorInfoBean monitorInfo = service.getMonitorInfoBean();
        System.out.println("cpu percent: " + monitorInfo.getCpuRatio());
        System.out.println("can use memory: " + monitorInfo.getTotalMemory());
        System.out.println("ideal memory: " + monitorInfo.getFreeMemory());
        System.out.println("largest memory: " + monitorInfo.getMaxMemory());
        System.out.println("all memory: " + monitorInfo.getTotalMemorySize() + "kb");
        System.out.println("ideal memory: " + monitorInfo.getFreeMemory() + "kb");
        System.out.println("used memory: " + monitorInfo.getUsedMemory() + "kb");
        System.out.println("thread num: " + monitorInfo.getTotalThread() + "kb");
    }
}

2.2 執行結果以下圖所示：

 

3 使用sigar獲取系統信息

3.1 下載安裝sigar-1.6.4.zip

 

    使用java自帶的包獲取系統數據，容易找不到包，尤爲是內存信息不夠準確，因此選擇使用sigar獲取系統信息。  

    下載地址：http://sourceforge.net/projects/sigar/files/latest/download?source=files

    解壓壓縮包，將lib下sigar.jar導入eclipse的CLASSPATH中，再將sigar-x86-winnt.dll存入Java的bin目錄便可。

3.2 代碼實現以下：

 

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 RuntimeTest {
    public static void main(String[] args) {
        try {
            // System信息，從jvm獲取
            property();
            System.out.println("----------------------------------");
            // cpu信息
            cpu();
            System.out.println("----------------------------------");
            // 內存信息
            memory();
            System.out.println("----------------------------------");
            // 操做系統信息
            os();
            System.out.println("----------------------------------");
            // 用戶信息
            who();
            System.out.println("----------------------------------");
            // 文件系統信息
            file();
            System.out.println("----------------------------------");
            // 網絡信息
            net();
            System.out.println("----------------------------------");
            // 以太網信息
            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");// 獲取用戶名
        String computerName = map.get("COMPUTERNAME");// 獲取計算機名
        String userDomain = map.get("USERDOMAIN");// 獲取計算機域名
        System.out.println("用戶名:    " + userName);
        System.out.println("計算機名:    " + computerName);
        System.out.println("計算機域名:    " + userDomain);
        System.out.println("本地ip地址:    " + ip);
        System.out.println("本地主機名:    " + addr.getHostName());
        System.out.println("JVM能夠使用的總內存:    " + r.totalMemory());
        System.out.println("JVM能夠使用的剩餘內存:    " + r.freeMemory());
        System.out.println("JVM能夠使用的處理器個數:    " + r.availableProcessors());
        System.out.println("Java的運行環境版本：    " + props.getProperty("java.version"));
        System.out.println("Java的運行環境供應商：    " + props.getProperty("java.vendor"));
        System.out.println("Java供應商的URL：    " + props.getProperty("java.vendor.url"));
        System.out.println("Java的安裝路徑：    " + props.getProperty("java.home"));
        System.out.println("Java的虛擬機規範版本：    " + props.getProperty("java.vm.specification.version"));
        System.out.println("Java的虛擬機規範供應商：    " + props.getProperty("java.vm.specification.vendor"));
        System.out.println("Java的虛擬機規範名稱：    " + props.getProperty("java.vm.specification.name"));
        System.out.println("Java的虛擬機實現版本：    " + props.getProperty("java.vm.version"));
        System.out.println("Java的虛擬機實現供應商：    " + props.getProperty("java.vm.vendor"));
        System.out.println("Java的虛擬機實現名稱：    " + props.getProperty("java.vm.name"));
        System.out.println("Java運行時環境規範版本：    " + props.getProperty("java.specification.version"));
        System.out.println("Java運行時環境規範供應商：    " + props.getProperty("java.specification.vender"));
        System.out.println("Java運行時環境規範名稱：    " + props.getProperty("java.specification.name"));
        System.out.println("Java的類格式版本號：    " + props.getProperty("java.class.version"));
        System.out.println("Java的類路徑：    " + props.getProperty("java.class.path"));
        System.out.println("加載庫時搜索的路徑列表：    " + props.getProperty("java.library.path"));
        System.out.println("默認的臨時文件路徑：    " + props.getProperty("java.io.tmpdir"));
        System.out.println("一個或多個擴展目錄的路徑：    " + props.getProperty("java.ext.dirs"));
        System.out.println("操做系統的名稱：    " + props.getProperty("os.name"));
        System.out.println("操做系統的構架：    " + props.getProperty("os.arch"));
        System.out.println("操做系統的版本：    " + props.getProperty("os.version"));
        System.out.println("文件分隔符：    " + props.getProperty("file.separator"));
        System.out.println("路徑分隔符：    " + props.getProperty("path.separator"));
        System.out.println("行分隔符：    " + props.getProperty("line.separator"));
        System.out.println("用戶的帳戶名稱：    " + props.getProperty("user.name"));
        System.out.println("用戶的主目錄：    " + props.getProperty("user.home"));
        System.out.println("用戶的當前工做目錄：    " + props.getProperty("user.dir"));
    }
 
    private static void memory() throws SigarException {
        Sigar sigar = new Sigar();
        Mem mem = sigar.getMem();
        // 內存總量
        System.out.println("內存總量:    " + mem.getTotal() / 1024L + "K av");
        // 當前內存使用量
        System.out.println("當前內存使用量:    " + mem.getUsed() / 1024L + "K used");
        // 當前內存剩餘量
        System.out.println("當前內存剩餘量:    " + mem.getFree() / 1024L + "K free");
        Swap swap = sigar.getSwap();
        // 交換區總量
        System.out.println("交換區總量:    " + swap.getTotal() / 1024L + "K av");
        // 當前交換區使用量
        System.out.println("當前交換區使用量:    " + swap.getUsed() / 1024L + "K used");
        // 當前交換區剩餘量
        System.out.println("當前交換區剩餘量:    " + 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++) {// 無論是單塊CPU仍是多CPU都適用
            CpuInfo info = infos[i];
            System.out.println("第" + (i + 1) + "塊CPU信息");
            System.out.println("CPU的總量MHz:    " + info.getMhz());// CPU的總量MHz
            System.out.println("CPU生產商:    " + info.getVendor());// 得到CPU的賣主，如：Intel
            System.out.println("CPU類別:    " + info.getModel());// 得到CPU的類別，如：Celeron
            System.out.println("CPU緩存數量:    " + info.getCacheSize());// 緩衝存儲器數量
            printCpuPerc(cpuList[i]);
        }
    }
 
    private static void printCpuPerc(CpuPerc cpu) {
        System.out.println("CPU用戶使用率:    " + CpuPerc.format(cpu.getUser()));// 用戶使用率
        System.out.println("CPU系統使用率:    " + CpuPerc.format(cpu.getSys()));// 系統使用率
        System.out.println("CPU當前等待率:    " + CpuPerc.format(cpu.getWait()));// 當前等待率
        System.out.println("CPU當前錯誤率:    " + CpuPerc.format(cpu.getNice()));//
        System.out.println("CPU當前空閒率:    " + CpuPerc.format(cpu.getIdle()));// 當前空閒率
        System.out.println("CPU總的使用率:    " + CpuPerc.format(cpu.getCombined()));// 總的使用率
    }
 
    private static void os() {
        OperatingSystem OS = OperatingSystem.getInstance();
        // 操做系統內核類型如： 38六、48六、586等x86
        System.out.println("操做系統:    " + OS.getArch());
        System.out.println("操做系統CpuEndian():    " + OS.getCpuEndian());//
        System.out.println("操做系統DataModel():    " + OS.getDataModel());//
        // 系統描述
        System.out.println("操做系統的描述:    " + OS.getDescription());
        // 操做系統類型
        // System.out.println("OS.getName():    " + OS.getName());
        // System.out.println("OS.getPatchLevel():    " + OS.getPatchLevel());//
        // 操做系統的賣主
        System.out.println("操做系統的賣主:    " + OS.getVendor());
        // 賣主名稱
        System.out.println("操做系統的賣主名:    " + OS.getVendorCodeName());
        // 操做系統名稱
        System.out.println("操做系統名稱:    " + OS.getVendorName());
        // 操做系統賣主類型
        System.out.println("操做系統賣主類型:    " + OS.getVendorVersion());
        // 操做系統的版本號
        System.out.println("操做系統的版本號:    " + 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("當前系統進程表中的用戶名" + String.valueOf(i));
                Who _who = who[i];
                System.out.println("用戶控制檯:    " + _who.getDevice());
                System.out.println("用戶host:    " + _who.getHost());
                // System.out.println("getTime():    " + _who.getTime());
                // 當前系統進程表中的用戶名
                System.out.println("當前系統進程表中的用戶名:    " + _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("分區的盤符名稱" + i);
            FileSystem fs = fslist[i];
            // 分區的盤符名稱
            System.out.println("盤符名稱:    " + fs.getDevName());
            // 分區的盤符名稱
            System.out.println("盤符路徑:    " + fs.getDirName());
            System.out.println("盤符標誌:    " + fs.getFlags());//
            // 文件系統類型，好比 FAT3二、NTFS
            System.out.println("盤符類型:    " + fs.getSysTypeName());
            // 文件系統類型名，好比本地硬盤、光驅、網絡文件系統等
            System.out.println("盤符類型名:    " + fs.getTypeName());
            // 文件系統類型
            System.out.println("盤符文件系統類型:    " + fs.getType());
            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 : 本地硬盤
                // 文件系統總大小
                System.out.println(fs.getDevName() + "總大小:    " + usage.getTotal() + "KB");
                // 文件系統剩餘大小
                System.out.println(fs.getDevName() + "剩餘大小:    " + usage.getFree() + "KB");
                // 文件系統可用大小
                System.out.println(fs.getDevName() + "可用大小:    " + usage.getAvail() + "KB");
                // 文件系統已經使用量
                System.out.println(fs.getDevName() + "已經使用量:    " + usage.getUsed() + "KB");
                double usePercent = usage.getUsePercent() * 100D;
                // 文件系統資源的利用率
                System.out.println(fs.getDevName() + "資源的利用率:    " + usePercent + "%");
                break;
            case 3:// TYPE_NETWORK ：網絡
                break;
            case 4:// TYPE_RAM_DISK ：閃存
                break;
            case 5:// TYPE_CDROM ：光驅
                break;
            case 6:// TYPE_SWAP ：頁面交換
                break;
            }
            System.out.println(fs.getDevName() + "讀出：    " + usage.getDiskReads());
            System.out.println(fs.getDevName() + "寫入：    " + usage.getDiskWrites());
        }
        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("網絡設備名:    " + name);// 網絡設備名
            System.out.println("IP地址:    " + ifconfig.getAddress());// IP地址
            System.out.println("子網掩碼:    " + ifconfig.getNetmask());// 子網掩碼
            if ((ifconfig.getFlags() & 1L) <= 0L) {
                System.out.println("!IFF_UP...skipping getNetInterfaceStat");
                continue;
            }
            NetInterfaceStat ifstat = sigar.getNetInterfaceStat(name);
            System.out.println(name + "接收的總包裹數:" + ifstat.getRxPackets());// 接收的總包裹數
            System.out.println(name + "發送的總包裹數:" + ifstat.getTxPackets());// 發送的總包裹數
            System.out.println(name + "接收到的總字節數:" + ifstat.getRxBytes());// 接收到的總字節數
            System.out.println(name + "發送的總字節數:" + ifstat.getTxBytes());// 發送的總字節數
            System.out.println(name + "接收到的錯誤包數:" + ifstat.getRxErrors());// 接收到的錯誤包數
            System.out.println(name + "發送數據包時的錯誤數:" + ifstat.getTxErrors());// 發送數據包時的錯誤數
            System.out.println(name + "接收時丟棄的包數:" + ifstat.getRxDropped());// 接收時丟棄的包數
            System.out.println(name + "發送時丟棄的包數:" + ifstat.getTxDropped());// 發送時丟棄的包數
        }
    }
 
    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() + "網關廣播地址:" + cfg.getBroadcast());// 網關廣播地址
            System.out.println(cfg.getName() + "網卡MAC地址:" + cfg.getHwaddr());// 網卡MAC地址
            System.out.println(cfg.getName() + "子網掩碼:" + cfg.getNetmask());// 子網掩碼
            System.out.println(cfg.getName() + "網卡描述信息:" + cfg.getDescription());// 網卡描述信息
            System.out.println(cfg.getName() + "網卡類型" + cfg.getType());//
        }
    }
}

 

 

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