sigar对虚拟机性能收集

于 2012-12-18 15:30:05 发布
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本文链接：https://blog.youkuaiyun.com/wj_j2ee/article/details/8314696
本文详细介绍Sigar.jar包的功能及使用方法，包括CPU资源、内存资源、操作系统信息、硬盘资源及网络信息的获取。

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              Sigar.jar包的使用方法
 
1、              CPU资源信息
a)         CPU数量（单位：个）
privatestaticint getCpuCount() throws SigarException {
     Sigar sigar = new Sigar();
     try {
         return sigar.getCpuInfoList().length;
     } finally {
         sigar.close();
     }
}
b)        CPU的总量（单位：HZ）及CPU的相关信息
Sigar sigar = getSigar();
       CpuInfo infos[] = sigar.getCpuInfoList();
       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];
           traceln("mhz=" + info.getMhz());//CPU的总量MHz
           traceln("vendor=" + info.getVendor());//获得CPU的卖主，如：Intel
           traceln("model=" + info.getModel());//获得CPU的类别，如：Celeron
           traceln("cache size=" + info.getCacheSize());//缓冲存储器数量
}
c)         CPU的用户使用量、系统使用剩余量、总的剩余量、总的使用占用量等（单位：100%）
publicvoid testCpuPerc() {
           Sigar sigar = new Sigar();
           // 方式一，主要是针对一块CPU的情况
           CpuPerc cpu;
           try {
               cpu = sigar.getCpuPerc();
               printCpuPerc(cpu);
           } catch (SigarException e) {
               e.printStackTrace();
           }
           // 方式二，不管是单块CPU还是多CPU都适用
           CpuPerc cpuList[] = null;
           try {
               cpuList = sigar.getCpuPercList();
           } catch (SigarException e) {
               e.printStackTrace();
               return;
           }
           for (int i = 0; i < cpuList.length; i++) {
               printCpuPerc(cpuList[i]);
           }
        }
        privatevoid printCpuPerc(CpuPerc cpu) {
           println("User :" + CpuPerc.format(cpu.getUser()));// 用户使用率
           println("Sys :" + CpuPerc.format(cpu.getSys()));// 系统使用率
           println("Wait :" + CpuPerc.format(cpu.getWait()));// 当前等待率
           println("Nice :" + CpuPerc.format(cpu.getNice()));//
           println("Idle :" + CpuPerc.format(cpu.getIdle()));// 当前空闲率
           println("Total :" + CpuPerc.format(cpu.getCombined()));// 总的使用率
}
d)        ……
2、              内存资源信息
a)        物理内存信息
Sigar sigar = new Sigar();
Mem mem = sigar.getMem();
// 内存总量
       System.out.println("Total = " + mem.getTotal() / 1024L + "K av");
       // 当前内存使用量
       System.out.println("Used = " + mem.getUsed() / 1024L + "K used");
       // 当前内存剩余量
System.out.println("Free = " + mem.getFree() / 1024L + "K free");
b)        系统页面文件交换区信息
Sigar sigar = new Sigar();
Swap swap = sigar.getSwap();
// 交换区总量
       System.out.println("Total = " + swap.getTotal() / 1024L + "K av");
       // 当前交换区使用量
       System.out.println("Used = " + swap.getUsed() / 1024L + "K used");
       // 当前交换区剩余量
System.out.println("Free = " + swap.getFree() / 1024L + "K free");
c)      ……
3、              操作系统信息
a)      取到当前操作系统的名称：
 private String getPlatformName() {
           String hostname = "";
           try {
               hostname = InetAddress.getLocalHost().getHostName();
           } catch (Exception exc) {
               Sigar sigar = new Sigar();
               try {
                  hostname = sigar.getNetInfo().getHostName();
               } catch (SigarException e) {
                  hostname = "localhost.unknown";
               } finally {
                  sigar.close();
               }
           }
           return hostname;
}
b)        取当前操作系统的信息
        publicvoid testGetOSInfo() {
           OperatingSystem OS = OperatingSystem.getInstance();
           // 操作系统内核类型如： 386、486、586等x86
           System.out.println("OS.getArch() = " + OS.getArch());
           System.out.println("OS.getCpuEndian() = " + OS.getCpuEndian());//
           System.out.println("OS.getDataModel() = " + OS.getDataModel());//
           // 系统描述
           System.out.println("OS.getDescription() = " + OS.getDescription());
           System.out.println("OS.getMachine() = " + OS.getMachine());//
           // 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("OS.getVendor() = " + OS.getVendor());
           // 卖主名称
           System.out.println("OS.getVendorCodeName() = " + OS.getVendorCodeName());
           // 操作系统名称
           System.out.println("OS.getVendorName() = " + OS.getVendorName());
           // 操作系统卖主类型
           System.out.println("OS.getVendorVersion() = " + OS.getVendorVersion());
           // 操作系统的版本号
           System.out.println("OS.getVersion() = " + OS.getVersion());
}
c)         取当前系统进程表中的用户信息
publicvoid testWho() {
           try {
               Sigar sigar = new Sigar();
               Who who[] = sigar.getWhoList();
               if (who != null && who.length > 0) {
                  for (int i = 0; i < who.length; i++) {
                      Sysout.out.println("/n~~~~~~~~~" + String.valueOf(i) + "~~~~~~~~~");
                      Who _who = who[i];
                      Sysout.out.println ("getDevice() = " + _who.getDevice());
                      Sysout.out.println ("getHost() = " + _who.getHost());
                      Sysout.out.println ("getTime() = " + _who.getTime());
                     //当前系统进程表中的用户名
                      Sysout.out.println ("getUser() = " + _who.getUser());
                  }
               }
           } catch (SigarException e) {
               e.printStackTrace();
           }
}
d)        ……
4、              资源信息（主要是硬盘）
a)      取硬盘已有的分区及其详细信息（通过sigar.getFileSystemList()来获得FileSystem列表对象，然后对其进行编历）：
publicvoid testFileSystemInfo() throws Exception {
           Sigar sigar = getSigar();
           FileSystem fslist[] = sigar.getFileSystemList();
           String dir = System.getProperty("user.home");//当前用户文件夹路径
           for (int i = 0; i < fslist.length; i++) {
               System.out.println("/n~~~~~~~~~~" + i + "~~~~~~~~~~");
               FileSystem fs = fslist[i];
               // 分区的盘符名称
               System.out.println("fs.getDevName() = " + fs.getDevName());
               // 分区的盘符名称
               System.out.println("fs.getDirName() = " + fs.getDirName());
               System.out.println("fs.getFlags() = " + fs.getFlags());//
               // 文件系统类型，比如 FAT32、NTFS
               System.out.println("fs.getSysTypeName() = " + 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("fs.getTypeName() = " + fs.getTypeName());
               // 文件系统类型
               System.out.println("fs.getType() = " + fs.getType());
               FileSystemUsage usage = null;
               try {
                  usage = sigar.getFileSystemUsage(fs.getDirName());
               } catch (SigarException e) {
                  if (fs.getType() == 2)
                      throw e;
                  continue;
               }
               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
                  System.out.println(" Total = " + usage.getTotal() + "KB");
                  // 文件系统剩余大小
                  System.out.println(" Free = " + usage.getFree() + "KB");
                  // 文件系统可用大小
                  System.out.println(" Avail = " + usage.getAvail() + "KB");
                  // 文件系统已经使用量
                  System.out.println(" Used = " + usage.getUsed() + "KB");
                  double usePercent = usage.getUsePercent() * 100D;
                  // 文件系统资源的利用率
                  System.out.println(" Usage = " + usePercent + "%");
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;
               }
               System.out.println(" DiskReads = " + usage.getDiskReads());
               System.out.println(" DiskWrites = " + usage.getDiskWrites());
           }
           return;
}
b)      ……
5、              网络信息
a)      当前机器的正式域名
public String getFQDN(){
           try {
               return InetAddress.getLocalHost().getCanonicalHostName();
           } catch (UnknownHostException e) {
               try {
                  Sigar sigar = new Sigar();
                  return sigar.getFQDN();
               } catch (SigarException ex) {
                  returnnull;
               } finally {
                     sigar.close();
                 }
           }
}
b)        取到当前机器的IP地址
public String getDefaultIpAddress() {
             String address = null;
             try {
                 address = InetAddress.getLocalHost().getHostAddress();
                 // 没有出现异常而正常当取到的IP时，如果取到的不是网卡循回地址时就返回
               // 否则再通过Sigar工具包中的方法来获取
if (!NetFlags.LOOPBACK_ADDRESS.equals(address)) {
                      return address;
                 }
             } catch (UnknownHostException e) {
                 //hostname not in DNS or /etc/hosts
             }
             Sigar sigar = new Sigar();
             try {
                 address = sigar.getNetInterfaceConfig().getAddress();
             } catch (SigarException e) {
                 address = NetFlags.LOOPBACK_ADDRESS;
             } finally {
                 sigar.close();
             }
return address;
}
c)         取到当前机器的MAC地址
public String getMAC() {
           Sigar sigar = null;
           try {
               sigar = new Sigar();
               String[] ifaces = sigar.getNetInterfaceList();
               String hwaddr = null;
               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;
                  }
                  /*如果存在多张网卡包括虚拟机的网卡，默认只取第一张网卡的MAC地址，如果要返回所有的网卡（包括物理的和虚拟的）则可以修改方法的返回类型为数组或Collection，通过在for循环里取到的多个MAC地址。*/
                  hwaddr = cfg.getHwaddr();
                  break;
               }
               return hwaddr != null ? hwaddr : null;
           } catch (Exception e) {
               returnnull;
           } finally {
               if (sigar != null)
                  sigar.close();
           }
}
d)        根据MAC地址来获得一个GUID号
public String getGUID(String mac) {
           if (mac == null)
               returnnull;
           EthernetAddress eAddr = new EthernetAddress(mac);
           return UUIDGenerator.getInstance().generateTimeBasedUUID(eAddr)
                  .toString();
}
e)         获取网络流量等信息
publicvoid testNetIfList() 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);
               print("/nname = " + name);//网络设备名
               print("Address = "+ ifconfig.getAddress());//IP地址
               print("Netmask = "+ ifconfig.getNetmask());//子网掩码
               if ( (ifconfig.getFlags() & 1L) <= 0L) {
                  print("!IFF_UP...skipping getNetInterfaceStat");
                  continue;
               }
               try {
                  NetInterfaceStat ifstat = sigar.getNetInterfaceStat(name);
                  print("RxPackets = " + ifstat.getRxPackets());//接收的总包裹数
                  print("TxPackets = " + ifstat.getTxPackets());//发送的总包裹数
                  print("RxBytes = " + ifstat.getRxBytes());//接收到的总字节数
                  print("TxBytes = " + ifstat.getTxBytes());//发送的总字节数
                  print("RxErrors = " + ifstat.getRxErrors());//接收到的错误包数
                  print("TxErrors = " + ifstat.getTxErrors());//发送数据包时的错误数
                  print("RxDropped = " + ifstat.getRxDropped());//接收时丢弃的包数
                  print("TxDropped = " + ifstat.getTxDropped());//发送时丢弃的包数
               } catch (SigarNotImplementedException e) {
               } catch (SigarException e) {
                  print(e.getMessage());
               }
           }
}
void print(String msg){
           System.out.println(msg);
}
f)         一些其他的信息
        privatevoid getEthernetInfo(){
           Sigar sigar = null;
           try {
               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.getAddress() = " + cfg.getAddress());//IP地址
                  System.out.println("cfg.getBroadcast() = " + cfg.getBroadcast());//网关广播地址
                  System.out.println("cfg.getHwaddr() = " + cfg.getHwaddr());//网卡MAC地址
                  System.out.println("cfg.getNetmask() = " + cfg.getNetmask());//子网掩码
                  System.out.println("cfg.getDescription() = " + cfg.getDescription());//网卡描述信息
                  System.out.println("cfg.getType() = " + cfg.getType());//
                  System.out.println("cfg.getDestination() = " + cfg.getDestination());
                  System.out.println("cfg.getFlags() = " + cfg.getFlags());//
                  System.out.println("cfg.getMetric() = " + cfg.getMetric());
                  System.out.println("cfg.getMtu() = " + cfg.getMtu());
                  System.out.println("cfg.getName() = " + cfg.getName());
                  System.out.println();
               }
           } catch (Exception e) {
               System.out.println("Error while creating GUID" + e);
           } finally {
               if (sigar != null)
                  sigar.close();
           }
}
 
1、              CPU资源信息
a)         CPU数量（单位：个）
privatestaticint getCpuCount() throws SigarException {
     Sigar sigar = new Sigar();
     try {
         return sigar.getCpuInfoList().length;
     } finally {
         sigar.close();
     }
}
b)        CPU的总量（单位：HZ）及CPU的相关信息
Sigar sigar = getSigar();
       CpuInfo infos[] = sigar.getCpuInfoList();
       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];
           traceln("mhz=" + info.getMhz());//CPU的总量MHz
           traceln("vendor=" + info.getVendor());//获得CPU的卖主，如：Intel
           traceln("model=" + info.getModel());//获得CPU的类别，如：Celeron
           traceln("cache size=" + info.getCacheSize());//缓冲存储器数量
}
c)         CPU的用户使用量、系统使用剩余量、总的剩余量、总的使用占用量等（单位：100%）
publicvoid testCpuPerc() {
           Sigar sigar = new Sigar();
           // 方式一，主要是针对一块CPU的情况
           CpuPerc cpu;
           try {
               cpu = sigar.getCpuPerc();
               printCpuPerc(cpu);
           } catch (SigarException e) {
               e.printStackTrace();
           }
           // 方式二，不管是单块CPU还是多CPU都适用
           CpuPerc cpuList[] = null;
           try {
               cpuList = sigar.getCpuPercList();
           } catch (SigarException e) {
               e.printStackTrace();
               return;
           }
           for (int i = 0; i < cpuList.length; i++) {
               printCpuPerc(cpuList[i]);
           }
        }
        privatevoid printCpuPerc(CpuPerc cpu) {
           println("User :" + CpuPerc.format(cpu.getUser()));// 用户使用率
           println("Sys :" + CpuPerc.format(cpu.getSys()));// 系统使用率
           println("Wait :" + CpuPerc.format(cpu.getWait()));// 当前等待率
           println("Nice :" + CpuPerc.format(cpu.getNice()));//
           println("Idle :" + CpuPerc.format(cpu.getIdle()));// 当前空闲率
           println("Total :" + CpuPerc.format(cpu.getCombined()));// 总的使用率
}
d)        ……
2、              内存资源信息
a)        物理内存信息
Sigar sigar = new Sigar();
Mem mem = sigar.getMem();
// 内存总量
       System.out.println("Total = " + mem.getTotal() / 1024L + "K av");
       // 当前内存使用量
       System.out.println("Used = " + mem.getUsed() / 1024L + "K used");
       // 当前内存剩余量
System.out.println("Free = " + mem.getFree() / 1024L + "K free");
b)        系统页面文件交换区信息
Sigar sigar = new Sigar();
Swap swap = sigar.getSwap();
// 交换区总量
       System.out.println("Total = " + swap.getTotal() / 1024L + "K av");
       // 当前交换区使用量
       System.out.println("Used = " + swap.getUsed() / 1024L + "K used");
       // 当前交换区剩余量
System.out.println("Free = " + swap.getFree() / 1024L + "K free");
c)      ……
3、              操作系统信息
a)      取到当前操作系统的名称：
 private String getPlatformName() {
           String hostname = "";
           try {
               hostname = InetAddress.getLocalHost().getHostName();
           } catch (Exception exc) {
               Sigar sigar = new Sigar();
               try {
                  hostname = sigar.getNetInfo().getHostName();
               } catch (SigarException e) {
                  hostname = "localhost.unknown";
               } finally {
                  sigar.close();
               }
           }
           return hostname;
}
b)        取当前操作系统的信息
        publicvoid testGetOSInfo() {
           OperatingSystem OS = OperatingSystem.getInstance();
           // 操作系统内核类型如： 386、486、586等x86
           System.out.println("OS.getArch() = " + OS.getArch());
           System.out.println("OS.getCpuEndian() = " + OS.getCpuEndian());//
           System.out.println("OS.getDataModel() = " + OS.getDataModel());//
           // 系统描述
           System.out.println("OS.getDescription() = " + OS.getDescription());
           System.out.println("OS.getMachine() = " + OS.getMachine());//
           // 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("OS.getVendor() = " + OS.getVendor());
           // 卖主名称
           System.out.println("OS.getVendorCodeName() = " + OS.getVendorCodeName());
           // 操作系统名称
           System.out.println("OS.getVendorName() = " + OS.getVendorName());
           // 操作系统卖主类型
           System.out.println("OS.getVendorVersion() = " + OS.getVendorVersion());
           // 操作系统的版本号
           System.out.println("OS.getVersion() = " + OS.getVersion());
}
c)         取当前系统进程表中的用户信息
publicvoid testWho() {
           try {
               Sigar sigar = new Sigar();
               Who who[] = sigar.getWhoList();
               if (who != null && who.length > 0) {
                  for (int i = 0; i < who.length; i++) {
                      Sysout.out.println("/n~~~~~~~~~" + String.valueOf(i) + "~~~~~~~~~");
                      Who _who = who[i];
                      Sysout.out.println ("getDevice() = " + _who.getDevice());
                      Sysout.out.println ("getHost() = " + _who.getHost());
                      Sysout.out.println ("getTime() = " + _who.getTime());
                     //当前系统进程表中的用户名
                      Sysout.out.println ("getUser() = " + _who.getUser());
                  }
               }
           } catch (SigarException e) {
               e.printStackTrace();
           }
}
d)        ……
4、              资源信息（主要是硬盘）
a)      取硬盘已有的分区及其详细信息（通过sigar.getFileSystemList()来获得FileSystem列表对象，然后对其进行编历）：
publicvoid testFileSystemInfo() throws Exception {
           Sigar sigar = getSigar();
           FileSystem fslist[] = sigar.getFileSystemList();
           String dir = System.getProperty("user.home");//当前用户文件夹路径
           for (int i = 0; i < fslist.length; i++) {
               System.out.println("/n~~~~~~~~~~" + i + "~~~~~~~~~~");
               FileSystem fs = fslist[i];
               // 分区的盘符名称
               System.out.println("fs.getDevName() = " + fs.getDevName());
               // 分区的盘符名称
               System.out.println("fs.getDirName() = " + fs.getDirName());
               System.out.println("fs.getFlags() = " + fs.getFlags());//
               // 文件系统类型，比如 FAT32、NTFS
               System.out.println("fs.getSysTypeName() = " + 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("fs.getTypeName() = " + fs.getTypeName());
               // 文件系统类型
               System.out.println("fs.getType() = " + fs.getType());
               FileSystemUsage usage = null;
               try {
                  usage = sigar.getFileSystemUsage(fs.getDirName());
               } catch (SigarException e) {
                  if (fs.getType() == 2)
                      throw e;
                  continue;
               }
               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
                  System.out.println(" Total = " + usage.getTotal() + "KB");
                  // 文件系统剩余大小
                  System.out.println(" Free = " + usage.getFree() + "KB");
                  // 文件系统可用大小
                  System.out.println(" Avail = " + usage.getAvail() + "KB");
                  // 文件系统已经使用量
                  System.out.println(" Used = " + usage.getUsed() + "KB");
                  double usePercent = usage.getUsePercent() * 100D;
                  // 文件系统资源的利用率
                  System.out.println(" Usage = " + usePercent + "%");
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;
               }
               System.out.println(" DiskReads = " + usage.getDiskReads());
               System.out.println(" DiskWrites = " + usage.getDiskWrites());
           }
           return;
}
b)      ……
5、              网络信息
a)      当前机器的正式域名
public String getFQDN(){
           try {
               return InetAddress.getLocalHost().getCanonicalHostName();
           } catch (UnknownHostException e) {
               try {
                  Sigar sigar = new Sigar();
                  return sigar.getFQDN();
               } catch (SigarException ex) {
                  returnnull;
               } finally {
                     sigar.close();
                 }
           }
}
b)        取到当前机器的IP地址
public String getDefaultIpAddress() {
             String address = null;
             try {
                 address = InetAddress.getLocalHost().getHostAddress();
                 // 没有出现异常而正常当取到的IP时，如果取到的不是网卡循回地址时就返回
               // 否则再通过Sigar工具包中的方法来获取
if (!NetFlags.LOOPBACK_ADDRESS.equals(address)) {
                      return address;
                 }
             } catch (UnknownHostException e) {
                 //hostname not in DNS or /etc/hosts
             }
             Sigar sigar = new Sigar();
             try {
                 address = sigar.getNetInterfaceConfig().getAddress();
             } catch (SigarException e) {
                 address = NetFlags.LOOPBACK_ADDRESS;
             } finally {
                 sigar.close();
             }
return address;
}
c)         取到当前机器的MAC地址
public String getMAC() {
           Sigar sigar = null;
           try {
               sigar = new Sigar();
               String[] ifaces = sigar.getNetInterfaceList();
               String hwaddr = null;
               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;
                  }
                  /*如果存在多张网卡包括虚拟机的网卡，默认只取第一张网卡的MAC地址，如果要返回所有的网卡（包括物理的和虚拟的）则可以修改方法的返回类型为数组或Collection，通过在for循环里取到的多个MAC地址。*/
                  hwaddr = cfg.getHwaddr();
                  break;
               }
               return hwaddr != null ? hwaddr : null;
           } catch (Exception e) {
               returnnull;
           } finally {
               if (sigar != null)
                  sigar.close();
           }
}
d)        根据MAC地址来获得一个GUID号
public String getGUID(String mac) {
           if (mac == null)
               returnnull;
           EthernetAddress eAddr = new EthernetAddress(mac);
           return UUIDGenerator.getInstance().generateTimeBasedUUID(eAddr)
                  .toString();
}
e)         获取网络流量等信息
publicvoid testNetIfList() 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);
               print("/nname = " + name);//网络设备名
               print("Address = "+ ifconfig.getAddress());//IP地址
               print("Netmask = "+ ifconfig.getNetmask());//子网掩码
               if ( (ifconfig.getFlags() & 1L) <= 0L) {
                  print("!IFF_UP...skipping getNetInterfaceStat");
                  continue;
               }
               try {
                  NetInterfaceStat ifstat = sigar.getNetInterfaceStat(name);
                  print("RxPackets = " + ifstat.getRxPackets());//接收的总包裹数
                  print("TxPackets = " + ifstat.getTxPackets());//发送的总包裹数
                  print("RxBytes = " + ifstat.getRxBytes());//接收到的总字节数
                  print("TxBytes = " + ifstat.getTxBytes());//发送的总字节数
                  print("RxErrors = " + ifstat.getRxErrors());//接收到的错误包数
                  print("TxErrors = " + ifstat.getTxErrors());//发送数据包时的错误数
                  print("RxDropped = " + ifstat.getRxDropped());//接收时丢弃的包数
                  print("TxDropped = " + ifstat.getTxDropped());//发送时丢弃的包数
               } catch (SigarNotImplementedException e) {
               } catch (SigarException e) {
                  print(e.getMessage());
               }
           }
}
void print(String msg){
           System.out.println(msg);
}
f)         一些其他的信息
        privatevoid getEthernetInfo(){
           Sigar sigar = null;
           try {
               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.getAddress() = " + cfg.getAddress());//IP地址
                  System.out.println("cfg.getBroadcast() = " + cfg.getBroadcast());//网关广播地址
                  System.out.println("cfg.getHwaddr() = " + cfg.getHwaddr());//网卡MAC地址
                  System.out.println("cfg.getNetmask() = " + cfg.getNetmask());//子网掩码
                  System.out.println("cfg.getDescription() = " + cfg.getDescription());//网卡描述信息
                  System.out.println("cfg.getType() = " + cfg.getType());//
                  System.out.println("cfg.getDestination() = " + cfg.getDestination());
                  System.out.println("cfg.getFlags() = " + cfg.getFlags());//
                  System.out.println("cfg.getMetric() = " + cfg.getMetric());
                  System.out.println("cfg.getMtu() = " + cfg.getMtu());
                  System.out.println("cfg.getName() = " + cfg.getName());
                  System.out.println();
               }
           } catch (Exception e) {
               System.out.println("Error while creating GUID" + e);
           } finally {
               if (sigar != null)
                  sigar.close();
           }
}
 
注：jar包我放到本论坛里，名为JSystemMonitorDemo-0.1alpha.jar。
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