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,WriteOperationString 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MHzSystem.out.println("vendor=" + info.getVendor());// 获得CPU的卖主，如：IntelSystem.out.println("model=" + info.getModel());// 获得CPU的类别，如：CeleronSystem.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x86System.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、NTFSSystem.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_NONEbreak;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();}}}