java获得CPU使用率

1、java获得CPU使用率，系统内存，虚拟机内存等情况（不用JNI）2009年10月23日星期五16:30Java取得这些信息，并且获得在Windows下的内存使用率MonitorlnfoBeanpackagecom.hmw.system.monitor;publicclassMonitorlnfoBean/*.*/privatelongtotalMemory;/*.*/privatelongfreeMemory;/*.*/privatelongmaxMemory;/*.*/privateStringosName;/*.*/privatelongtotalMemorySize;/*.*/priv

2、atelongfreePhysicalMemorySize;/*.*/privatelongusedMemory;.*/privateinttotalThread;/*cpu.*/privatedoublecpuRatio;publiclonggetFreeMemory()returnfreeMemory;publicvoidsetFreeMemory(longfreeMemory)this.freeMemory=freeMemory;publiclonggetFreePhysicalMemorySize()returnfreePhysicalMemorySize;publicvoidsetF

3、reePhysicalMemorySize(longfreePhysicalMemorySize)this.freePhysicalMemorySize=freePhysicalMemorySize;publiclonggetMaxMemory()returnmaxMemory;publicvoidsetMaxMemory(longmaxMemory)this.maxMemory=maxMemory;publicStringgetOsName()returnosName;publicvoidsetOsName(StringosName)this.osName=osName;publiclong

4、getTotalMemory()returntotalMemory;publicvoidsetTotalMemory(longtotalMemory)this.totalMemory=totalMemory;publiclonggetTotalMemorySize()returntotalMemorySize;publicvoidsetTotalMemorySize(longtotalMemorySize)this.totalMemorySize=totalMemorySize;publicintgetTotalThread()returntotalThread;publicvoidsetTo

5、talThread(inttotalThread)this.totalThread=totalThread;publiclonggetUsedMemory()returnusedMemory;publicvoidsetUsedMemory(longusedMemory)this.usedMemory=usedMemory;publicdoublegetCpuRatio()returncpuRatio;publicvoidsetCpuRatio(doublecpuRatio)this.cpuRatio=cpuRatio;packagecom.hmw.system.monitor;*/public

6、interfaceIMonitorService/*return返回构造好的监控对象*throwsException*/publicMonitorInfoBeangetMonitorInfoBean()throwsException;MonitorServicelmpIpackagecom.hmw.system.monitor;importjava.io.BufferedReader;importjava.io.lOException;importjava.io.lnputStream;importjava.io.lnputStreamReader;importjava.io.LineNumb

7、erReader;importjava.utiI.StringTokenizer;importsun.management.ManagementFactory;importcom.sun.management.OperatingSystemMXBean;*authorGuoHuang*/publicclassMonitorServiceImplimplementsIMonitorServiceprivatestaticfinalintCPUTIME=30;privatestaticfinalintPERCENT=100;privatestaticfinalintFAULTLENGTH=10;p

8、rivatestaticStringlinuxVersion=null;*return返回构造好的监控对象*throwsException*authorGuoHuang*/publicMonitorInfoBeangetMonitorInfoBean()throwsExceptionintkb=1024;/可使用内存longtotalMemory=Runtime.getRuntime().totalMemory()/kb;/剩余内存longfreeMemory=Runtime.getRuntime().freeMemory()/kb;/最大可使用内存longmaxMemory=Runtime.

9、getRuntime().maxMemory()/kb;OperatingSystemMXBeanosmxb=(OperatingSystemMXBean)ManagementFactory.getOperatingSystemMXBean();/StringosName=System.getProperty();/总的物理内存longtotalMemorySize=osmxb.getTotalPhysicalMemorySize()/kb;/剩余的物理内存longfreePhysicalMemorySize=osmxb.getFreePhysicalMemorySize()/kb;/已使用的

10、物理内存longusedMemory=(osmxb.getTotalPhysicalMemorySize()-osmxb.getFreePhysicalMemorySize()/kb;/获得线程总数ThreadGroupparentThread;for(parentThread=Thread.currentThread().getThreadGroup();parentThread.getParent()!=null;parentThread=parentThread.getParent();inttotalThread=parentThread.activeCount();doublecpu

11、Ratio=0;if(osName.toLowerCase().startsWith(windows)cpuRatio=this.getCpuRatioForWindows();elsecpuRatio=getCpuRateForLinux();/构造返回对象MonitorInfoBeaninfoBean=newMonitorInfoBean();infoBean.setFreeMemory(freeMemory);infoBean.setFreePhysicalMemorySize(freePhysicalMemorySize);infoBean.setMaxMemory(maxMemory

12、);infoBean.setOsName(osName);infoBean.setTotalMemory(totalMemory);infoBean.setTotalMemorySize(totalMemorySize);infoBean.setTotalThread(totalThread);infoBean.setUsedMemory(usedMemory);infoBean.setCpuRatio(cpuRatio);returninfoBean;privatestaticdoublegetCpuRateForLinux()InputStreamis=null;InputStreamRe

13、aderisr=null;BufferedReaderbrStat=null;StringTokenizertokenStat=null;trySystem.out.println(GetusagerateofCUP,linuxversion:+linuxVersion);Processprocess=Runtime.getRuntime().exec(top-b-n1);is=process.getInputStream();isr=newInputStreamReader(is);brStat=newBufferedReader(isr);if(linuxVersion.equals(2.

14、4)brStat.readLine();brStat.readLine();brStat.readLine();brStat.readLine();tokenStat=newStringTokenizer(brStat.readLine();tokenStat.nextToken();tokenStat.nextToken();Stringuser=tokenStat.nextToken();tokenStat.nextToken();Stringsystem=tokenStat.nextToken();tokenStat.nextToken();Stringnice=tokenStat.ne

15、xtToken();System.out.println(user+,+system+,+nice);user=user.substring(0,user.indexOf(%);system=system.substring(0,system.indexOf(%);nice=nice.substring(0,nice.indexOf(%);floatuserUsage=newFloat(user).floatValue();floatsystemUsage=newFloat(system).floatValue();floatniceUsage=newFloat(nice).floatValu

16、e();return(userUsage+systemUsage+niceUsage)/100;elsebrStat.readLine();brStat.readLine();tokenStat=newStringTokenizer(brStat.readLine();tokenStat.nextToken();tokenStat.nextToken();tokenStat.nextToken();tokenStat.nextToken();tokenStat.nextToken();tokenStat.nextToken();tokenStat.nextToken();StringcpuUs

17、age=tokenStat.nextToken();System.out.println(CPUidle:+cpuUsage);Floatusage=newFloat(cpuUsage.substring(0,cpuUsage.indexOf(%);return(1-usage.floatValue()/100);catch(IOExceptionioe)System.out.println(ioe.getMessage();freeResource(is,isr,brStat);return1;finallyfreeResource(is,isr,brStat);privatestaticv

18、oidfreeResource(InputStreamis,InputStreamReaderisr,BufferedReaderbr)tryif(is!=null)is.close();if(isr!=null)isr.close();if(br!=null)br.close();catch(IOExceptionioe)System.out.println(ioe.getMessage();/*CPU*returncpuauthorGuoHuang*/privatedoublegetCpuRatioForWindows()tryStringprocCmd=System.getenv(win

19、dir)+system32wbemwmic.exeprocessgetCaption,CommandLine,KernelModeTime,ReadOperationCount,ThreadCount,UserModeTime,WriteOperationCount/取进程信息longc0=readCpu(Runtime.getRuntime().exec(procCmd);Thread.sleep(CPUTIME);longc1=readCpu(Runtime.getRuntime().exec(procCmd);if(c0!=null&c1!=null)longidletime=c10-c

20、00;longbusytime=c11-c01;returnDouble.valueOf(PERCENT*(busytime)/(busytime+idletime).doubleValue();elsereturn0.0;catch(Exceptionex)ex.printStackTrace();return0.0;/*CPUparamprocreturn*authorGuoHuang*/privatelongreadCpu(finalProcessproc)longretn=newlong2;tryproc.getOutputStream().close();InputStreamRea

21、derir=newInputStreamReader(proc.getInputStream();LineNumberReaderinput=newLineNumberReader(ir);Stringline=input.readLine();if(line=null|line.length()FAULTLENGTH)returnnull;intcapidx=line.indexOf(Caption);intcmdidx=line.indexOf(CommandLine);introcidx=line.indexOf(ReadOperationCount);intumtidx=line.in

22、dexOf(UserModeTime);intkmtidx=line.indexOf(KernelModeTime);intwocidx=line.indexOf(WriteOperationCount);longidletime=0;longkneltime=0;longusertime=0;while(line=input.readLine()!=null)if(line.length()=0)continue;Strings1=Bytes.substring(line,kmtidx,rocidx-1).trim();Strings2=Bytes.substring(line,umtidx

23、,wocidx-1).trim();if(caption.equals(SystemIdleProcess)|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).longVa

24、lue();retn0=idletime;retn1=kneltime+usertime;returnretn;catch(Exceptionex)ex.printStackTrace();finallytryproc.getInputStream().close();catch(Exceptione)e.printStackTrace();returnnull;/*.*paramargs*throwsException*authorGuoHuang*/publicstaticvoidmain(Stringargs)throwsExceptionIMonitorServiceservice=newMonitorServiceImpl();MonitorInfoBeanmonitorInfo=service.getMonitorInfo