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(); } }
}