java的探针，获得系统相关的信息
package com.bumt.police.test;
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.util.StringTokenizer;
?import sun.management.ManagementFactory;
?import com.sun.management.OperatingSystemMXBean;
public class MonitorServiceImpl implements IMonitorService
{
private static final int CPUTIME = 30;
private static final int PERCENT = 100;
private static final int FAULTLENGTH = 10;
private static final File versionFile = new File("/proc/version");
private static String linuxVersion = null; /
** * 获得当前的监控对象. * @return 返回构造好的监控对象 * @throws Exception * @author GuoHuang */ public MonitorInfoBean getMonitorInfoBean() throws Exception
{
?int kb = 1024; // 可使用内存
long totalMemory = Runtime.getRuntime().totalMemory() / kb; // 剩余内存
long freeMemory = Runtime.getRuntime().freeMemory() / kb; // 最大可使用内存
long maxMemory = Runtime.getRuntime().maxMemory() / kb;
OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory .getOperatingSystemMXBean(); // 操作系统
String osName = System.getProperty("os.name"); // 总的物理内存
long totalMemorySize = osmxb.getTotalPhysicalMemorySize() / kb; // 剩余的物理内存
long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize() / kb; // 已使用的物理内存
long usedMemory = (osmxb.getTotalPhysicalMemorySize() - osmxb .getFreePhysicalMemorySize()) / kb; // 获得线程总数
ThreadGroup parentThread;
?for (parentThread = Thread.currentThread().getThreadGroup();
parentThread .getParent() != null;
parentThread = parentThread.getParent()) ;
?int totalThread = parentThread.activeCount();
double cpuRatio = 0; if (osName.toLowerCase().startsWith("windows"))
{
?cpuRatio = this.getCpuRatioForWindows();
}
else
{
cpuRatio = this.getCpuRateForLinux();
} // 构造返回对象
?MonitorInfoBean infoBean = new MonitorInfoBean();
infoBean.setFreeMemory(freeMemory);
infoBean.setFreePhysicalMemorySize(freePhysicalMemorySize);
infoBean.setMaxMemory(maxMemory);
infoBean.setOsName(osName);
infoBean.setTotalMemory(totalMemory);
infoBean.setTotalMemorySize(totalMemorySize);
infoBean.setTotalThread(totalThread);
infoBean.setUsedMemory(usedMemory);
?infoBean.setCpuRatio(cpuRatio); return infoBean;
}
private static double getCpuRateForLinux(){
InputStream is = null;
InputStreamReader isr = null; BufferedReader brStat = null;
StringTokenizer tokenStat = null;
try{
System.out.println("Get usage rate of CUP , linux version: "+linuxVersion);
Process process = Runtime.getRuntime().exec("top -b -n 1");
is = process.getInputStream();
isr = new InputStreamReader(is);
brStat = new BufferedReader(isr);
if(linuxVersion.equals("2.4")){
brStat.readLine();
brStat.readLine();
?brStat.readLine();
brStat.readLine();
tokenStat = new StringTokenizer(brStat.readLine());
?tokenStat.nextToken();
?tokenStat.nextToken();
?String user = tokenStat.nextToken();
tokenStat.nextToken();
String system = tokenStat.nextToken();
tokenStat.nextToken();
String nice = tokenStat.nextToken();
System.out.println(user+" , "+system+" , "+nice);
?user = user.substring(0,user.indexOf("%"));
?system = system.substring(0,system.indexOf("%"));
nice = nice.substring(0,nice.indexOf("%"));
float userUsage = new Float(user).floatValue();
?float systemUsage = new Float(system).floatValue();
float niceUsage = new Float(nice).floatValue();
return (userUsage+systemUsage+niceUsage)/100;
}
else{
?brStat.readLine();
brStat.readLine();
tokenStat = new StringTokenizer(brStat.readLine());
?tokenStat.nextToken();
?tokenStat.nextToken();
tokenStat.nextToken();
?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 (1-usage.floatValue()/100);
} }
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());
?} } /** * 获得CPU使用率. * @return 返回cpu使用率 * @author GuoHuang */ private double 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 Double.valueOf( PERCENT * (busytime) / (busytime + idletime)) .doubleValue();
}
else {
return 0.0;
} }
catch (Exception ex) {
ex.printStackTrace(); return 0.0;
?} }
/** * 读取CPU信息. * @param proc * @return * @author GuoHuang */
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() = 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 static void main(String[] args) throws Exception
{
IMonitorService service = new MonitorServiceImpl();
MonitorInfoBean monitorInfo = service.getMonitorInfoBean();
System.out.println("cpu占有率=" + monitorInfo.getCpuRatio());
System.out.println("可使用内存=" + monitorInfo.getTotalMemory());
System.out.println("剩余内存=" + monitorInfo.getFreeMemory());
System.out.println("最大可使用内存=" + monitorInfo.getMaxMemory());
System.out.println("操作系统=" + monitorInfo.getOsName()); System.out.println("总的物理内存=" + monitorInfo.getTotalMemorySize() + "kb");
System.out.println("剩余的物理内存=" + monitorInfo.getFreeMemory() + "kb");
?System.out.println("已使用的物理内存=" + monitorInfo.getUsedMemory() + "kb");
System.out.println("线程总数=" + monitorInfo.getTotalThread() + "kb");
?} }
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
这是编辑器出问题了导致的。还没有修改。