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Java获取系统信息(cpu,内存,硬盘,进程等)的相关方法

2013-11-07 20:31 871 查看
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();

}

}

}
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