最近項目中要求檢測伺服器cpu、記憶體、磁盤進行預警，在網上搜了些資料，發現有很多都是對于windows，也有很多獲得的資料是不對的，下面是我整理後的代碼：
先定義bean對象
public class MonitorInfoBean {
private long totalMemory;
private long freeMemory;
private long maxMemory;
private String osName;
private long totalMemorySize;
private long freePhysicalMemorySize;
private long usedMemory;
private int totalThread;
private double cpuRatio;
private double memoryRatio;
private String diskRatio;
public long getFreeMemory() {
return freeMemory;
}
public void setFreeMemory(long freeMemory) {
this.freeMemory = freeMemory;
}
public long getFreePhysicalMemorySize() {
return freePhysicalMemorySize;
}
public void setFreePhysicalMemorySize(long freePhysicalMemorySize) {
this.freePhysicalMemorySize = freePhysicalMemorySize;
}
public long getMaxMemory() {
return maxMemory;
}
public void setMaxMemory(long maxMemory) {
this.maxMemory = maxMemory;
}
public String getOsName() {
return osName;
}
public void setOsName(String osName) {
this.osName = osName;
}
public long getTotalMemory() {
return totalMemory;
}
public void setTotalMemory(long totalMemory) {
this.totalMemory = totalMemory;
}
public long getTotalMemorySize() {
return totalMemorySize;
}
public void setTotalMemorySize(long totalMemorySize) {
this.totalMemorySize = totalMemorySize;
}
public int getTotalThread() {
return totalThread;
}
public void setTotalThread(int totalThread) {
this.totalThread = totalThread;
}
public long getUsedMemory() {
return usedMemory;
}
public void setUsedMemory(long usedMemory) {
this.usedMemory = usedMemory;
}
public double getCpuRatio() {
return cpuRatio;
}
public void setCpuRatio(double cpuRatio) {
this.cpuRatio = cpuRatio;
}
public double getMemoryRatio() {
return memoryRatio;
}
public void setMemoryRatio(double memoryRatio) {
this.memoryRatio = memoryRatio;
}
public String getDiskRatio() {
return diskRatio;
}
public void setDiskRatio(String diskRatio) {
this.diskRatio = diskRatio;
}
}
實作類定義：
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.LineNumberReader;
import java.lang.management.ManagementFactory;
import java.text.DecimalFormat;
import java.util.StringTokenizer;
import com.sun.management.OperatingSystemMXBean;
import com.pkit.netmgr.model.Bytes;
import com.pkit.netmgr.model.MonitorInfoBean;
public class MonitorServiceImpl {
private static final int CPUTIME = 30;
private static final int PERCENT = 100;
private static final int FAULTLENGTH = 10;
public MonitorInfoBean Diskfree() {
File[] roots = File.listRoots();
String diskRatio="";
// 擷取磁盤分區清單
for (File file : roots){
long freespace = file.getFreeSpace();
long totalSpace= file.getTotalSpace();
if(totalSpace>0){
double disk =(Double) (1 - freespace * 1.0
/ totalSpace) * 100;
DecimalFormat df = new DecimalFormat("#.00");
diskRatio = diskRatio+"|"+SafeUtil.getString(df.format(disk));
}
}
MonitorInfoBean bean = new MonitorInfoBean();
bean.setDiskRatio(diskRatio);
return bean;
}
public MonitorInfoBean getMonitorInfoBeanCpu() throws Exception {
int kb = 1024;
// 作業系統
String osName = System.getProperty("os.name");
double cpuRatio = 0;
if (osName.toLowerCase().startsWith("windows")) {
cpuRatio = this.getCpuRatioForWindows();
}
else {
cpuRatio = this.getCpuRateForLinux();
DecimalFormat df = new DecimalFormat("#.00");
cpuRatio = SafeUtil.getDouble(df.format(cpuRatio));
System.out.println("cpuRatio="+cpuRatio);
}
// 構造傳回對象
MonitorInfoBean infoBean = new MonitorInfoBean();
infoBean.setCpuRatio(cpuRatio);
return infoBean;
}
public MonitorInfoBean getMonitorInfoBeanMemory() throws Exception {
int kb = 1024;
// 可使用記憶體
long totalMemory = Runtime.getRuntime().totalMemory();
// 剩餘記憶體
long freeMemory = Runtime.getRuntime().freeMemory();
// 最大可使用記憶體
long maxMemory = Runtime.getRuntime().maxMemory() / kb/kb;
OperatingSystemMXBean osmxb = (OperatingSystemMXBean)sun.management.ManagementFactory
.getOperatingSystemMXBean();
// 作業系統
String osName = System.getProperty("os.name");
// 總的實體記憶體
long totalMemorySize = osmxb.getTotalPhysicalMemorySize() / kb/kb;
// 已使用的實體記憶體
long usedMemory = (osmxb.getTotalPhysicalMemorySize() - osmxb
.getFreePhysicalMemorySize())
/ kb/ kb;
// 獲得線程總數
ThreadGroup parentThread;
for (parentThread = Thread.currentThread().getThreadGroup(); parentThread
.getParent() != null; parentThread = parentThread.getParent())
;
int totalThread = parentThread.activeCount();
Double compare=0.0;
if (osName.toLowerCase().startsWith("windows")) {
// 總的實體記憶體+虛拟記憶體
long totalvirtualMemory = osmxb.getTotalSwapSpaceSize();
// 剩餘的實體記憶體
long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize();
compare = (Double) (1 - freePhysicalMemorySize * 1.0
/ totalvirtualMemory) * 100;
DecimalFormat df = new DecimalFormat("#.00");
compare = SafeUtil.getDouble(df.format(compare));
}
else {
compare = getMemoryRatioForLinux();
DecimalFormat df = new DecimalFormat("#.00");
compare = SafeUtil.getDouble(df.format(compare*100));
}
// 構造傳回對象
MonitorInfoBean infoBean = new MonitorInfoBean();
infoBean.setFreeMemory(freeMemory);
infoBean.setMaxMemory(maxMemory);
infoBean.setOsName(osName);
infoBean.setTotalMemory(totalMemory);
infoBean.setTotalMemorySize(totalMemorySize);
infoBean.setTotalThread(totalThread);
infoBean.setUsedMemory(usedMemory);
infoBean.setMemoryRatio(compare);
return infoBean;
}
private double getCpuRateForLinux(){
InputStream is = null;
InputStreamReader isr = null;
BufferedReader brStat = null;
StringTokenizer tokenStat = null;
try{
Process process = Runtime.getRuntime().exec("top -b -n 1");
is = process.getInputStream();
isr = new InputStreamReader(is);
brStat = new BufferedReader(isr);
brStat.readLine();
brStat.readLine();
tokenStat = new StringTokenizer(brStat.readLine());
tokenStat.nextToken();
tokenStat.nextToken();
tokenStat.nextToken();
tokenStat.nextToken();
String cpuUsage = tokenStat.nextToken();
System.out.println("CPU idle : "+cpuUsage);
Float usage = new Float(cpuUsage.substring(0,cpuUsage.indexOf("%")));
return (100-usage.floatValue());
} catch(IOException ioe){
System.out.println(ioe.getMessage());
freeResource(is, isr, brStat);
return 1;
} finally{
freeResource(is, isr, brStat);
}
}
private static void freeResource(InputStream is, InputStreamReader isr, BufferedReader br){
try{
if(is!=null)
is.close();
if(isr!=null)
isr.close();
if(br!=null)
br.close();
}catch(IOException ioe){
System.out.println(ioe.getMessage());
}
}
private double getCpuRatioForWindows() {
try {
String procCmd = System.getenv("windir")
+ "\\system32\\wbem\\wmic.exe process get Caption,CommandLine,"
+ "KernelModeTime,ReadOperationCount,ThreadCount,UserModeTime,WriteOperationCount";
// 取程序資訊
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 Double.valueOf(
PERCENT * (busytime) / (busytime + idletime))
.doubleValue();
} else {
return 0.0;
}
} catch (Exception ex) {
ex.printStackTrace();
return 0.0;
}
}
private 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;
}
// 字段出現順序：Caption,CommandLine,KernelModeTime,ReadOperationCount,
// ThreadCount,UserModeTime,WriteOperation
String caption = Bytes.substring(line, capidx, cmdidx - 1)
.trim();
String cmd = Bytes.substring(line, cmdidx, kmtidx - 1).trim();
if (cmd.indexOf("wmic.exe") >= 0) {
continue;
}
// log.info("line="+line);
if (caption.equals("System Idle Process")
|| caption.equals("System")) {
idletime += Long.valueOf(
Bytes.substring(line, kmtidx, rocidx - 1).trim())
.longValue();
idletime += Long.valueOf(
Bytes.substring(line, umtidx, wocidx - 1).trim())
.longValue();
continue;
}
kneltime += Long.valueOf(
Bytes.substring(line, kmtidx, rocidx - 1).trim())
.longValue();
usertime += Long.valueOf(
Bytes.substring(line, umtidx, wocidx - 1).trim())
.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;
}
public double getMemoryRatioForLinux() {
double memUsage = 0.0;
Process pro = null;
Runtime r = Runtime.getRuntime();
try {
String command = "cat /proc/meminfo";
pro = r.exec(command);
BufferedReader in = new BufferedReader(new InputStreamReader(pro.getInputStream()));
String line = null;
int count = 0;
long totalMem = 0, freeMem = 0;
while((line=in.readLine()) != null){
String[] memInfo = line.split("\\s+");
if(memInfo[0].startsWith("MemTotal")){
totalMem = Long.parseLong(memInfo[1]);
}
if(memInfo[0].startsWith("MemFree")){
freeMem = Long.parseLong(memInfo[1]);
}
memUsage = 1- (float)freeMem/(float)totalMem;
System.out.println("記憶體totalMem="+totalMem+",freeMem="+freeMem);
if(++count == 2){
break;
}
}
in.close();
pro.destroy();
} catch (IOException e) {
e.printStackTrace();
}
return memUsage;
}
}
public class Bytes {
public 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;
}
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