Java获取系统信息（cpu，内存，硬盘，进程等）的相关方法

1.利用jdk自带的API获取信息：（只支持jdk1.60以上的版本啊）

import java.io.InputStreamReader; import java.io.LineNumberReader; import java.util.ArrayList; import java.util.List;

import mytools.com.sun.management.OperatingSystemMXBean; import mytools.java.io.File; import mytools.java.lang.management.ManagementFactory; /**  * 获取windows系统信息（CPU,内存,文件系统）  * @author libing  *  */

public class WindowsInfoUtil {     private static final int CPUTIME = 500;     private static final int PERCENT = 100;     private static final int FAULTLENGTH = 10;

    public static void main(String[] args) {     System.out.println(getCpuRatioForWindows());     System.out.println(getMemery());     System.out.println(getDisk());  }

 //获取内存使用率  public static String getMemery(){   OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();   // 总的物理内存+虚拟内存   long totalvirtualMemory = osmxb.getTotalSwapSpaceSize();   // 剩余的物理内存   long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize();   Double compare=(Double)(1-freePhysicalMemorySize*1.0/totalvirtualMemory)*100;   String str="内存已使用:"+compare.intValue()+"%";   return str;  }

 //获取文件系统使用率  public static List<String> getDisk() {   // 操作系统   List<String> list=new ArrayList<String>();   for (char c = 'A'; c <= 'Z'; c++) {    String dirName = c + ":/";    File win = new File(dirName);          if(win.exists()){           long total=(long)win.getTotalSpace();           long free=(long)win.getFreeSpace();           Double compare=(Double)(1-free*1.0/total)*100;           String str=c+":盘  已使用 "+compare.intValue()+"%";           list.add(str);          }      }         return list;  }

 //获得cpu使用率  public static String 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(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 "CPU使用率:"+Double.valueOf(PERCENT * (busytime)*1.0 / (busytime + idletime)).intValue()+"%";              } else {                  return "CPU使用率:"+0+"%";              }          } catch (Exception ex) {              ex.printStackTrace();              return "CPU使用率:"+0+"%";          }      }

 //读取cpu相关信息     private static 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;                 }                 // 字段出现顺序：Caption,CommandLine,KernelModeTime,ReadOperationCount,                 // ThreadCount,UserModeTime,WriteOperation                 String caption =substring(line, capidx, cmdidx - 1).trim();                 String cmd = substring(line, cmdidx, kmtidx - 1).trim();                 if (cmd.indexOf("wmic.exe") >= 0) {                     continue;                 }                 String s1 = substring(line, kmtidx, rocidx - 1).trim();                 String s2 = substring(line, umtidx, wocidx - 1).trim();                 if (caption.equals("System Idle Process") || caption.equals("System")) {                     if (s1.length() > 0)                         idletime += Long.valueOf(s1).longValue();                     if (s2.length() > 0)                         idletime += Long.valueOf(s2).longValue();                     continue;                 }                 if (s1.length() > 0)                     kneltime += Long.valueOf(s1).longValue();                 if (s2.length() > 0)                     usertime += Long.valueOf(s2).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;     }

    /**    * 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    */     private 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.利用第三方的jar包：（Hyperic-hq官方网站：http://www.hyperic.com）

通过Hyperic-hq产品的基础包sigar.jar来实现服务器状态数据的获取。Sigar.jar包是通过本地方法来调用操作系统API来获取系统相关数据。Windows操作系统下Sigar.jar依赖sigar-amd64-winnt.dll或sigar-x86-winnt.dll，linux 操作系统下则依赖libsigar-amd64-linux.so或libsigar-x86-linux.so

import java.net.InetAddress; import java.net.UnknownHostException; 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.SigarNotImplementedException; import org.hyperic.sigar.Swap;

public class SysInfo {

 // 1.CPU资源信息

 // a)CPU数量（单位：个）  public static int 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  public void getCpuTotal() {   Sigar sigar = new Sigar();   CpuInfo[] infos;   try {    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];     System.out.println("mhz=" + info.getMhz());// CPU的总量MHz     System.out.println("vendor=" + info.getVendor());// 获得CPU的卖主，如：Intel     System.out.println("model=" + info.getModel());// 获得CPU的类别，如：Celeron     System.out.println("cache size=" + info.getCacheSize());// 缓冲存储器数量    }   } catch (SigarException e) {    e.printStackTrace();   }  }

 // 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%）  public void 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]);   }  }

 private void printCpuPerc(CpuPerc cpu) {   System.out.println("User :" + CpuPerc.format(cpu.getUser()));// 用户使用率   System.out.println("Sys :" + CpuPerc.format(cpu.getSys()));// 系统使用率   System.out.println("Wait :" + CpuPerc.format(cpu.getWait()));// 当前等待率   System.out.println("Nice :" + CpuPerc.format(cpu.getNice()));//   System.out.println("Idle :" + CpuPerc.format(cpu.getIdle()));// 当前空闲率   System.out.println("Total :" + CpuPerc.format(cpu.getCombined()));// 总的使用率  }

 // 2.内存资源信息  public void getPhysicalMemory() {   // a)物理内存信息   Sigar sigar = new Sigar();   Mem mem;   try {    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    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");   } catch (SigarException e) {    e.printStackTrace();   }  }

 // 3.操作系统信息

 // a)取到当前操作系统的名称：  public 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  public void 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  public void testWho() {   try {    Sigar sigar = new Sigar();    org.hyperic.sigar.Who[] who = sigar.getWhoList();    if (who != null && who.length > 0) {     for (int i = 0; i < who.length; i++) {      System.out.println("/n~~~~~~~~~" + String.valueOf(i)+ "~~~~~~~~~");      org.hyperic.sigar.Who _who = who[i];      System.out.println("getDevice() = " + _who.getDevice());      System.out.println("getHost() = " + _who.getHost());      System.out.println("getTime() = " + _who.getTime());      // 当前系统进程表中的用户名      System.out.println("getUser() = " + _who.getUser());     }    }   } catch (SigarException e) {    e.printStackTrace();   }  }

 // 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）：  public void testFileSystemInfo() throws Exception {   Sigar sigar = new Sigar();   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;  }

 // 5.网络信息

 // a)当前机器的正式域名  public String getFQDN() {   Sigar sigar = null;   try {    return InetAddress.getLocalHost().getCanonicalHostName();   } catch (UnknownHostException e) {    try {     sigar = new Sigar();     return sigar.getFQDN();    } catch (SigarException ex) {     return null;    } 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) {    return null;   } finally {    if (sigar != null)     sigar.close();   }  }

 // d)获取网络流量等信息  public void 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);  }

 // e)一些其他的信息  public void 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();   }  }

}