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） 1 import java.io.InputStreamReader; 2 import java.io.LineNumberReader; 3 import java.util.ArrayList; 4 import java.util.List; 5 import mytools.com.sun.management.OperatingSystemMXBean; 6 import mytools.java.io.File; 7 import mytools.java.lang.management.ManagementFactory; 8 /** 9 * 获取windows系统信息（CPU,内存,文件系统） 10 * @author libing 11 * 12 */ 13 public class WindowsInfoUtil { 14 private static final int CPUTIME = 500; 15 private static final int PERCENT = 100; 16 private static final int FAULTLENGTH = 10; 17 18 public static void main(String[] args) { 19 20 System.out.println(getCpuRatioForWindows()); 21 System.out.println(getMemery()); 22 System.out.println(getDisk()); 23 } 24 25 //获取内存使用率 26 public static String getMemery(){ 27 28 OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean(); 29 30 // 总的物理内存+虚拟内存 31 32 long totalvirtualMemory = osmxb.getTotalSwapSpaceSize(); 33 // 剩余的物理内存 34 long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize(); 35 36 Double compare=(Double)(1-freePhysicalMemorySize*1.0/totalvirtualMemory)*100; 37 38 String str="内存已使用:"+compare.intValue()+"%"; 39 40 return str; 41 } 42 43 44 //获取文件系统使用率 45 46 public static List<String> getDisk() { 47 48 // 操作系统 49 50 List<String> list=new ArrayList<String>(); 51 52 for (char c = 'A'; c <= 'Z'; c++) { 53 54 String dirName = c + ":/"; 55 56 File win = new File(dirName); 57 58 if(win.exists()){ 59 60 long total=(long)win.getTotalSpace(); 61 62 long free=(long)win.getFreeSpace(); 63 64 Double compare=(Double)(1-free*1.0/total)*100; 65 66 String str=c+":盘 已使用 "+compare.intValue()+"%"; 67 68 list.add(str); 69 } 70 71 } 72 73 return list; 74 75 } 76 77 78 //获得cpu使用率 79 80 public static String getCpuRatioForWindows() { 81 try { 82 83 String procCmd = System.getenv("windir") + "//system32//wbem//wmic.exe process get Caption,CommandLine,KernelModeTime,ReadOperationCount,ThreadCount,UserModeTime,WriteOperationCount"; 84 85 // 取进程信息 86 87 long[] c0 = readCpu(Runtime.getRuntime().exec(procCmd)); 88 89 Thread.sleep(CPUTIME); 90 91 long[] c1 = readCpu(Runtime.getRuntime().exec(procCmd)); 92 93 if (c0 != null && c1 != null) { 94 95 long idletime = c1[0] - c0[0]; 96 97 long busytime = c1[1] - c0[1]; 98 99 return "CPU使用率:"+Double.valueOf(PERCENT * (busytime)*1.0 / (busytime + idletime)).intValue()+"%"; 100 } else { 101 return "CPU使用率:"+0+"%"; 102 } 103 } catch (Exception ex) { 104 ex.printStackTrace(); 105 return "CPU使用率:"+0+"%"; 106 } 107 } 108 109 //读取cpu相关信息 110 111 private static long[] readCpu(final Process proc) { 112 113 long[] retn = new long[2]; 114 115 try { 116 117 proc.getOutputStream().close(); 118 119 InputStreamReader ir = new InputStreamReader(proc.getInputStream()); 120 121 LineNumberReader input = new LineNumberReader(ir); 122 123 String line = input.readLine(); 124 125 if (line == null || line.length() < FAULTLENGTH) { 126 127 return null; 128 } 129 int capidx = line.indexOf("Caption"); 130 int cmdidx = line.indexOf("CommandLine"); 131 int rocidx = line.indexOf("ReadOperationCount"); 132 int umtidx = line.indexOf("UserModeTime"); 133 int kmtidx = line.indexOf("KernelModeTime"); 134 int wocidx = line.indexOf("WriteOperationCount"); 135 long idletime = 0; 136 long kneltime = 0; 137 long usertime = 0; 138 while ((line = input.readLine()) != null) { 139 if (line.length() < wocidx) { 140 continue; 141 } 142 143 // 字段出现顺序：Caption,CommandLine,KernelModeTime,ReadOperationCount, 144 // ThreadCount,UserModeTime,WriteOperation 145 String caption =substring(line, capidx, cmdidx - 1).trim(); 146 String cmd = substring(line, cmdidx, kmtidx - 1).trim(); 147 if (cmd.indexOf("wmic.exe") >= 0) { 148 continue; 149 } 150 String s1 = substring(line, kmtidx, rocidx - 1).trim(); 151 String s2 = substring(line, umtidx, wocidx - 1).trim(); 152 if (caption.equals("System Idle Process") || caption.equals("System")) { 153 if (s1.length() > 0) 154 idletime += Long.valueOf(s1).longValue(); 155 if (s2.length() > 0) 156 idletime += Long.valueOf(s2).longValue(); 157 continue; 158 } 159 if (s1.length() > 0) 160 kneltime += Long.valueOf(s1).longValue(); 161 if (s2.length() > 0) 162 usertime += Long.valueOf(s2).longValue(); 163 } 164 retn[0] = idletime; 165 retn[1] = kneltime + usertime; 166 return retn; 167 } catch (Exception ex) { 168 ex.printStackTrace(); 169 } finally { 170 try { 171 proc.getInputStream().close(); 172 } catch (Exception e) { 173 e.printStackTrace(); 174 } 175 } 176 return null; 177 } 178 /** 179 * 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： 180 * @param src 要截取的字符串 181 * @param start_idx 开始坐标（包括该坐标) 182 * @param end_idx 截止坐标（包括该坐标） 183 * @return 184 */ 185 186 private static String substring(String src, int start_idx, int end_idx) { 187 byte[] b = src.getBytes(); 188 String tgt = ""; 189 for (int i = start_idx; i <= end_idx; i++) { 190 tgt += (char) b; 191 } 192 return tgt; 193 } 194 } 2、利用第三方的jar包
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 195 import java.net.InetAddress; 196 import java.net.UnknownHostException; 197 import org.hyperic.sigar.CpuInfo; 198 import org.hyperic.sigar.CpuPerc; 199 import org.hyperic.sigar.FileSystem; 200 import org.hyperic.sigar.FileSystemUsage; 201 import org.hyperic.sigar.Mem; 202 import org.hyperic.sigar.NetFlags; 203 import org.hyperic.sigar.NetInterfaceConfig; 204 import org.hyperic.sigar.NetInterfaceStat; 205 import org.hyperic.sigar.OperatingSystem; 206 import org.hyperic.sigar.Sigar; 207 import org.hyperic.sigar.SigarException; 208 import org.hyperic.sigar.SigarNotImplementedException; 209 import org.hyperic.sigar.Swap; 210 211 public class SysInfo { 212 // 1.CPU资源信息 213 // a)CPU数量（单位：个） 214 public static int getCpuCount() throws SigarException { 215 Sigar sigar = new Sigar(); 216 try { 217 return sigar.getCpuInfoList().length; 218 } finally { 219 sigar.close(); 220 } 221 } 222 223 // b)CPU的总量（单位：HZ）及CPU的相关信息 224 public void getCpuTotal() { 225 Sigar sigar = new Sigar(); 226 CpuInfo[] infos; 227 try { 228 infos = sigar.getCpuInfoList(); 229 for (int i = 0; i < infos.length; i++) {// 不管是单块CPU还是多CPU都适用 230 CpuInfo info = infos; 231 System.out.println("mhz=" + info.getMhz());// CPU的总量MHz 232 System.out.println("vendor=" + info.getVendor());// 获得CPU的卖主，如：Intel 233 System.out.println("model=" + info.getModel());// 获得CPU的类别，如：Celeron 234 System.out.println("cache size=" + info.getCacheSize());// 缓冲存储器数量 235 } 236 } catch (SigarException e) { 237 e.printStackTrace(); 238 } 239 } 240 // 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%） 241 public void testCpuPerc() { 242 Sigar sigar = new Sigar(); 243 // 方式一，主要是针对一块CPU的情况 244 CpuPerc cpu; 245 try { 246 cpu = sigar.getCpuPerc(); 247 printCpuPerc(cpu); 248 } catch (SigarException e) { 249 e.printStackTrace(); 250 } 251 // 方式二，不管是单块CPU还是多CPU都适用 252 CpuPerc cpuList[] = null; 253 try { 254 cpuList = sigar.getCpuPercList(); 255 } catch (SigarException e) { 256 e.printStackTrace(); 257 return; 258 } 259 for (int i = 0; i < cpuList.length; i++) { 260 printCpuPerc(cpuList); 261 } 262 } 263 private void printCpuPerc(CpuPerc cpu) { 264 System.out.println("User :" + CpuPerc.format(cpu.getUser()));// 用户使用率 265 266 System.out.println("Sys :" + CpuPerc.format(cpu.getSys()));// 系统使用率 267 268 System.out.println("Wait :" + CpuPerc.format(cpu.getWait()));// 当前等待率 269 270 System.out.println("Nice :" + CpuPerc.format(cpu.getNice()));// 271 System.out.println("Idle :" + CpuPerc.format(cpu.getIdle()));// 当前空闲率 272 273 System.out.println("Total :" + CpuPerc.format(cpu.getCombined()));// 总的使用率 274 } 275 // 2.内存资源信息 276 public void getPhysicalMemory() { 277 // a)物理内存信息 278 Sigar sigar = new Sigar(); 279 Mem mem; 280 281 try { 282 283 mem = sigar.getMem(); 284 285 // 内存总量 286 System.out.println("Total = " + mem.getTotal() / 1024L + "K av"); 287 // 当前内存使用量 288 System.out.println("Used = " + mem.getUsed() / 1024L + "K used"); 289 // 当前内存剩余量 290 System.out.println("Free = " + mem.getFree() / 1024L + "K free"); 291 292 // b)系统页面文件交换区信息 293 Swap swap = sigar.getSwap(); 294 // 交换区总量 295 System.out.println("Total = " + swap.getTotal() / 1024L + "K av"); 296 // 当前交换区使用量 297 System.out.println("Used = " + swap.getUsed() / 1024L + "K used"); 298 // 当前交换区剩余量 299 System.out.println("Free = " + swap.getFree() / 1024L + "K free"); 300 } catch (SigarException e) { 301 e.printStackTrace(); 302 } 303 304 305 } 306 // 3.操作系统信息 307 // a)取到当前操作系统的名称： 308 public String getPlatformName() { 309 String hostname = ""; 310 try { 311 hostname = InetAddress.getLocalHost().getHostName(); 312 } catch (Exception exc) { 313 Sigar sigar = new Sigar(); 314 try { 315 hostname = sigar.getNetInfo().getHostName(); 316 } catch (SigarException e) { 317 hostname = "localhost.unknown"; 318 } finally { 319 sigar.close(); 320 } 321 } 322 return hostname; 323 } 324 // b)取当前操作系统的信息 325 public void testGetOSInfo() { 326 OperatingSystem OS = OperatingSystem.getInstance(); 327 // 操作系统内核类型如： 386、486、586等x86 328 System.out.println("OS.getArch() = " + OS.getArch()); 329 System.out.println("OS.getCpuEndian() = " + OS.getCpuEndian());// 330 System.out.println("OS.getDataModel() = " + OS.getDataModel());// 331 // 系统描述 332 System.out.println("OS.getDescription() = " + OS.getDescription()); 333 System.out.println("OS.getMachine() = " + OS.getMachine());// 334 // 操作系统类型 335 336 337 System.out.println("OS.getName() = " + OS.getName()); 338 339 340 System.out.println("OS.getPatchLevel() = " + OS.getPatchLevel());// 341 342 343 // 操作系统的卖主 344 345 346 System.out.println("OS.getVendor() = " + OS.getVendor()); 347 348 349 // 卖主名称 350 351 352 System.out 353 354 355 .println("OS.getVendorCodeName() = " + OS.getVendorCodeName()); 356 357 358 // 操作系统名称 359 360 361 System.out.println("OS.getVendorName() = " + OS.getVendorName()); 362 363 364 // 操作系统卖主类型 365 366 367 System.out.println("OS.getVendorVersion() = " + OS.getVendorVersion()); 368 369 370 // 操作系统的版本号 371 System.out.println("OS.getVersion() = " + OS.getVersion()); 372 } 373 // c)取当前系统进程表中的用户信息 374 public void testWho() { 375 try { 376 Sigar sigar = new Sigar(); 377 org.hyperic.sigar.Who[] who = sigar.getWhoList(); 378 if (who != null && who.length > 0) { 379 for (int i = 0; i < who.length; i++) { 380 System.out.println("/n~~~~~~~~~" + String.valueOf(i)+ "~~~~~~~~~"); 381 org.hyperic.sigar.Who _who = who; 382 System.out.println("getDevice() = " + _who.getDevice()); 383 System.out.println("getHost() = " + _who.getHost()); 384 System.out.println("getTime() = " + _who.getTime()); 385 // 当前系统进程表中的用户名 386 System.out.println("getUser() = " + _who.getUser()); 387 } 388 } 389 390 391 } catch (SigarException e) { 392 e.printStackTrace(); 393 } 394 } 395 // 4.资源信息（主要是硬盘） 396 // 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）： 397 public void testFileSystemInfo() throws Exception { 398 Sigar sigar = new Sigar(); 399 FileSystem fslist[] = sigar.getFileSystemList(); 400 //String dir = System.getProperty("user.home");// 当前用户文件夹路径 401 for (int i = 0; i < fslist.length; i++) { 402 System.out.println("/n~~~~~~~~~~" + i + "~~~~~~~~~~"); 403 FileSystem fs = fslist; 404 // 分区的盘符名称 405 System.out.println("fs.getDevName() = " + fs.getDevName()); 406 // 分区的盘符名称 407 System.out.println("fs.getDirName() = " + fs.getDirName()); 408 System.out.println("fs.getFlags() = " + fs.getFlags()); 409 // 文件系统类型，比如 FAT32、NTFS 410 System.out.println("fs.getSysTypeName() = " + fs.getSysTypeName()); 411 // 文件系统类型名，比如本地硬盘、光驱、网络文件系统等 412 System.out.println("fs.getTypeName() = " + fs.getTypeName()); 413 // 文件系统类型 414 System.out.println("fs.getType() = " + fs.getType()); 415 FileSystemUsage usage = null; 416 try { 417 usage = sigar.getFileSystemUsage(fs.getDirName()); 418 } catch (SigarException e) { 419 if (fs.getType() == 2) 420 throw e; 421 continue; 422 } 423 switch (fs.getType()) { 424 case 0: // TYPE_UNKNOWN ：未知 425 break; 426 case 1: // TYPE_NONE 427 break; 428 case 2: // TYPE_LOCAL_DISK : 本地硬盘 429 // 文件系统总大小 430 System.out.println(" Total = " + usage.getTotal() + "KB"); 431 432 433 // 文件系统剩余大小 434 System.out.println(" Free = " + usage.getFree() + "KB"); 435 // 文件系统可用大小 436 System.out.println(" Avail = " + usage.getAvail() + "KB"); 437 // 文件系统已经使用量 438 System.out.println(" Used = " + usage.getUsed() + "KB"); 439 double usePercent = usage.getUsePercent() * 100D; 440 // 文件系统资源的利用率 441 System.out.println(" Usage = " + usePercent + "%"); 442 break; 443 case 3:// TYPE_NETWORK ：网络 444 break; 445 case 4:// TYPE_RAM_DISK ：闪存 446 break; 447 case 5:// TYPE_CDROM ：光驱 448 break; 449 case 6:// TYPE_SWAP ：页面交换 450 break; 451 } 452 System.out.println(" DiskReads = " + usage.getDiskReads()); 453 System.out.println(" DiskWrites = " + usage.getDiskWrites()); 454 } 455 return; 456 } 457 // 5.网络信息 458 // a)当前机器的正式域名 459 public String getFQDN() { 460 Sigar sigar = null; 461 try { 462 return InetAddress.getLocalHost().getCanonicalHostName(); 463 464 465 } catch (UnknownHostException e) { 466 try { 467 sigar = new Sigar(); 468 return sigar.getFQDN(); 469 } catch (SigarException ex) { 470 return null; 471 } finally { 472 sigar.close(); 473 } 474 } 475 } 476 // b)取到当前机器的IP地址 477 478 479 public String getDefaultIpAddress() { 480 String address = null; 481 try { 482 483 484 address = InetAddress.getLocalHost().getHostAddress(); 485 // 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 486 487 // 否则再通过Sigar工具包中的方法来获取 488 if (!NetFlags.LOOPBACK_ADDRESS.equals(address)) { 489 return address; 490 } 491 } catch (UnknownHostException e) { 492 493 494 // hostname not in DNS or /etc/hosts 495 } 496 Sigar sigar = new Sigar(); 497 try { 498 499 500 address = sigar.getNetInterfaceConfig().getAddress(); 501 502 503 } catch (SigarException e) { 504 505 506 address = NetFlags.LOOPBACK_ADDRESS; 507 508 509 } finally { 510 511 512 sigar.close(); 513 514 515 } 516 517 518 return address; 519 520 521 } 522 // c)取到当前机器的MAC地址 523 524 525 public String getMAC() { 526 527 528 Sigar sigar = null; 529 530 531 try { 532 533 534 sigar = new Sigar(); 535 536 537 String[] ifaces = sigar.getNetInterfaceList(); 538 539 540 String hwaddr = null; 541 542 543 for (int i = 0; i < ifaces.length; i++) { 544 545 546 NetInterfaceConfig cfg = sigar.getNetInterfaceConfig(ifaces); 547 548 549 if (NetFlags.LOOPBACK_ADDRESS.equals(cfg.getAddress()) 550 551 552 || (cfg.getFlags() & NetFlags.IFF_LOOPBACK) != 0 553 554 555 || NetFlags.NULL_HWADDR.equals(cfg.getHwaddr())) { 556 continue; 557 } 558 /* 559 * 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 560 * ，通过在for循环里取到的多个MAC地址。 561 */ 562 hwaddr = cfg.getHwaddr(); 563 break; 564 } 565 return hwaddr != null ? hwaddr : null; 566 } catch (Exception e) { 567 return null; 568 } finally { 569 if (sigar != null) 570 sigar.close(); 571 } 572 } 573 // d)获取网络流量等信息 574 public void testNetIfList() throws Exception { 575 Sigar sigar = new Sigar(); 576 String ifNames[] = sigar.getNetInterfaceList(); 577 for (int i = 0; i < ifNames.length; i++) { 578 String name = ifNames; 579 NetInterfaceConfig ifconfig = sigar.getNetInterfaceConfig(name); 580 print("/nname = " + name);// 网络设备名 581 print("Address = " + ifconfig.getAddress());// IP地址 582 print("Netmask = " + ifconfig.getNetmask());// 子网掩码 583 if ((ifconfig.getFlags() & 1L) <= 0L) { 584 print("!IFF_UP...skipping getNetInterfaceStat"); 585 continue; 586 } 587 try { 588 NetInterfaceStat ifstat = sigar.getNetInterfaceStat(name); 589 print("RxPackets = " + ifstat.getRxPackets());// 接收的总包裹数 590 print("TxPackets = " + ifstat.getTxPackets());// 发送的总包裹数 591 print("RxBytes = " + ifstat.getRxBytes());// 接收到的总字节数 592 print("TxBytes = " + ifstat.getTxBytes());// 发送的总字节数 593 print("RxErrors = " + ifstat.getRxErrors());// 接收到的错误包数 594 print("TxErrors = " + ifstat.getTxErrors());// 发送数据包时的错误数 595 print("RxDropped = " + ifstat.getRxDropped());// 接收时丢弃的包数 596 print("TxDropped = " + ifstat.getTxDropped());// 发送时丢弃的包数 597 } catch (SigarNotImplementedException e) { 598 } catch (SigarException e) { 599 print(e.getMessage()); 600 601 602 } 603 } 604 } 605 void print(String msg) { 606 607 608 System.out.println(msg); 609 610 611 } 612 // e)一些其他的信息 613 public void getEthernetInfo() { 614 Sigar sigar = null; 615 try { 616 sigar = new Sigar(); 617 String[] ifaces = sigar.getNetInterfaceList(); 618 for (int i = 0; i < ifaces.length; i++) { 619 NetInterfaceConfig cfg = sigar.getNetInterfaceConfig(ifaces); 620 if (NetFlags.LOOPBACK_ADDRESS.equals(cfg.getAddress()) 621 || (cfg.getFlags() & NetFlags.IFF_LOOPBACK) != 0 622 || NetFlags.NULL_HWADDR.equals(cfg.getHwaddr())) { 623 continue; 624 } 625 System.out.println("cfg.getAddress() = " + cfg.getAddress());// IP地址 626 System.out.println("cfg.getBroadcast() = " + cfg.getBroadcast());// 网关广播地址 627 System.out.println("cfg.getHwaddr() = " + cfg.getHwaddr());// 网卡MAC地址 628 System.out.println("cfg.getNetmask() = " + cfg.getNetmask());// 子网掩码 629 System.out.println("cfg.getDescription() = " 630 + cfg.getDescription());// 网卡描述信息 631 System.out.println("cfg.getType() = " + cfg.getType());// 632 System.out.println("cfg.getDestination() = " 633 + cfg.getDestination()); 634 System.out.println("cfg.getFlags() = " + cfg.getFlags());// 635 System.out.println("cfg.getMetric() = " + cfg.getMetric()); 636 System.out.println("cfg.getMtu() = " + cfg.getMtu()); 637 System.out.println("cfg.getName() = " + cfg.getName()); 638 System.out.println(); 639 } 640 } catch (Exception e) { 641 System.out.println("Error while creating GUID" + e); 642 } finally { 643 if (sigar != null) 644 sigar.close(); 645 646 } 647 } 648 }
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