OSHI可以跨平臺(tái)查看服務(wù)器信息，其中cpu負(fù)載信息為當(dāng)前占用CPU的時(shí)間。需要在一段時(shí)間內(nèi)獲取兩次，然后相減得出這段時(shí)間內(nèi)所占用的時(shí)間。這段時(shí)間除以總占用時(shí)間就是占用百分比。
環(huán)境java1.8
使用
- 依賴
<dependency>
<groupId>com.github.oshi</groupId>
<artifactId>oshi-core</artifactId>
<version>3.12.2</version>
</dependency>
package io.greatcolin.jvmMessage;
import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import oshi.hardware.GlobalMemory;
import java.text.DecimalFormat;
import java.util.Properties;
import java.util.concurrent.TimeUnit;
/**
* @author colin.cheng
* @version V1.0
* @date Created In 16:04 2019/8/16
*/
public class OshiTest {
public static void main(String[] args) {
while (true){
try {
OshiTest.printlnCpuInfo();
OshiTest.MemInfo();
OshiTest.getThread();
OshiTest.setSysInfo();
OshiTest.setJvmInfo();
TimeUnit.SECONDS.sleep(5);
}catch (Exception e){
e.printStackTrace();
}
}
}
private static void printlnCpuInfo() throws InterruptedException {
//System.out.println("----------------cpu信息----------------");
SystemInfo systemInfo = new SystemInfo();
CentralProcessor processor = systemInfo.getHardware().getProcessor();
long[] prevTicks = processor.getSystemCpuLoadTicks();
// 睡眠1s
TimeUnit.SECONDS.sleep(1);
long[] ticks = processor.getSystemCpuLoadTicks();
long nice = ticks[CentralProcessor.TickType.NICE.getIndex()] - prevTicks[CentralProcessor.TickType.NICE.getIndex()];
long irq = ticks[CentralProcessor.TickType.IRQ.getIndex()] - prevTicks[CentralProcessor.TickType.IRQ.getIndex()];
long softirq = ticks[CentralProcessor.TickType.SOFTIRQ.getIndex()] - prevTicks[CentralProcessor.TickType.SOFTIRQ.getIndex()];
long steal = ticks[CentralProcessor.TickType.STEAL.getIndex()] - prevTicks[CentralProcessor.TickType.STEAL.getIndex()];
long cSys = ticks[CentralProcessor.TickType.SYSTEM.getIndex()] - prevTicks[CentralProcessor.TickType.SYSTEM.getIndex()];
long user = ticks[CentralProcessor.TickType.USER.getIndex()] - prevTicks[CentralProcessor.TickType.USER.getIndex()];
long iowait = ticks[CentralProcessor.TickType.IOWAIT.getIndex()] - prevTicks[CentralProcessor.TickType.IOWAIT.getIndex()];
long idle = ticks[CentralProcessor.TickType.IDLE.getIndex()] - prevTicks[CentralProcessor.TickType.IDLE.getIndex()];
long totalCpu = user + nice + cSys + idle + iowait + irq + softirq + steal;
System.out.println("----------------cpu信息----------------");
System.out.println("cpu核數(shù):" + processor.getLogicalProcessorCount());
System.out.println("cpu系統(tǒng)使用率:" + new DecimalFormat("#.##%").format(cSys * 1.0 / totalCpu));
System.out.println("cpu用戶使用率:" + new DecimalFormat("#.##%").format(user * 1.0 / totalCpu));
System.out.println("cpu當(dāng)前等待率:" + new DecimalFormat("#.##%").format(iowait * 1.0 / totalCpu));
System.out.println("cpu當(dāng)前使用率:" + new DecimalFormat("#.##%").format(1.0-(idle * 1.0 / totalCpu)));
}
public static void MemInfo(){
System.out.println("----------------主機(jī)內(nèi)存信息----------------");
SystemInfo systemInfo = new SystemInfo();
GlobalMemory memory = systemInfo.getHardware().getMemory();
//總內(nèi)存
long totalByte = memory.getTotal();
//剩余
long acaliableByte = memory.getAvailable();
System.out.println("總內(nèi)存 = " + formatByte(totalByte));
System.out.println("使用" + formatByte(totalByte-acaliableByte));
System.out.println("剩余內(nèi)存 = " + formatByte(acaliableByte));
System.out.println("使用率：" + new DecimalFormat("#.##%").format((totalByte-acaliableByte)*1.0/totalByte));
}
public static void setSysInfo(){
System.out.println("----------------操作系統(tǒng)信息----------------");
Properties props = System.getProperties();
//系統(tǒng)名稱
String osName = props.getProperty("os.name");
//架構(gòu)名稱
String osArch = props.getProperty("os.arch");
System.out.println("操作系統(tǒng)名 = " + osName);
System.out.println("系統(tǒng)架構(gòu) = " + osArch);
}
public static void setJvmInfo(){
System.out.println("----------------jvm信息----------------");
Properties props = System.getProperties();
Runtime runtime = Runtime.getRuntime();
//jvm總內(nèi)存
long jvmTotalMemoryByte = runtime.totalMemory();
//jvm最大可申請(qǐng)
long jvmMaxMoryByte = runtime.maxMemory();
//空閑空間
long freeMemoryByte = runtime.freeMemory();
//jdk版本
String jdkVersion = props.getProperty("java.version");
//jdk路徑
String jdkHome = props.getProperty("java.home");
System.out.println("jvm內(nèi)存總量 = " + formatByte(jvmTotalMemoryByte));
System.out.println("jvm已使用內(nèi)存 = " + formatByte(jvmTotalMemoryByte-freeMemoryByte));
System.out.println("jvm剩余內(nèi)存 = " + formatByte(freeMemoryByte));
System.out.println("jvm內(nèi)存使用率 = " + new DecimalFormat("#.##%").format((jvmTotalMemoryByte-freeMemoryByte)*1.0/jvmTotalMemoryByte));
System.out.println("java版本 = " + jdkVersion);
//System.out.println("jdkHome = " + jdkHome);
}
public static void getThread(){
System.out.println("----------------線程信息----------------");
ThreadGroup currentGroup =Thread.currentThread().getThreadGroup();
while (currentGroup.getParent()!=null){
// 返回此線程組的父線程組
currentGroup=currentGroup.getParent();
}
//此線程組中活動(dòng)線程的估計(jì)數(shù)
int noThreads = currentGroup.activeCount();
Thread[] lstThreads = new Thread[noThreads];
//把對(duì)此線程組中的所有活動(dòng)子組的引用復(fù)制到指定數(shù)組中。
currentGroup.enumerate(lstThreads);
for (Thread thread : lstThreads) {
System.out.println("線程數(shù)量："+noThreads+" 線程id：" + thread.getId() + " 線程名稱：" + thread.getName() + " 線程狀態(tài)：" + thread.getState());
}
}
public static String formatByte(long byteNumber){
//換算單位
double FORMAT = 1024.0;
double kbNumber = byteNumber/FORMAT;
if(kbNumber<FORMAT){
return new DecimalFormat("#.##KB").format(kbNumber);
}
double mbNumber = kbNumber/FORMAT;
if(mbNumber<FORMAT){
return new DecimalFormat("#.##MB").format(mbNumber);
}
double gbNumber = mbNumber/FORMAT;
if(gbNumber<FORMAT){
return new DecimalFormat("#.##GB").format(gbNumber);
}
double tbNumber = gbNumber/FORMAT;
return new DecimalFormat("#.##TB").format(tbNumber);
}
}
結(jié)果
# 沒添加slf4j的依賴，不影響
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
----------------cpu信息----------------
cpu核數(shù):4
cpu系統(tǒng)使用率:1.88%
cpu用戶使用率:2.73%
cpu當(dāng)前等待率:0%
cpu當(dāng)前使用率:4.71%
----------------主機(jī)內(nèi)存信息----------------
總內(nèi)存 = 7.88GB
使用5.89GB
剩余內(nèi)存 = 1.99GB
使用率：74.72%
----------------線程信息----------------
線程數(shù)量：5 線程id：2 線程名稱：Reference Handler 線程狀態(tài)：WAITING
線程數(shù)量：5 線程id：3 線程名稱：Finalizer 線程狀態(tài)：WAITING
線程數(shù)量：5 線程id：4 線程名稱：Signal Dispatcher 線程狀態(tài)：RUNNABLE
線程數(shù)量：5 線程id：5 線程名稱：Attach Listener 線程狀態(tài)：RUNNABLE
線程數(shù)量：5 線程id：1 線程名稱：main 線程狀態(tài)：RUNNABLE
----------------操作系統(tǒng)信息----------------
操作系統(tǒng)名 = Windows 7
系統(tǒng)架構(gòu) = amd64
----------------jvm信息----------------
jvm內(nèi)存總量 = 123MB
jvm已使用內(nèi)存 = 20.46MB
jvm剩余內(nèi)存 = 102.54MB
jvm內(nèi)存使用率 = 16.64%
java版本 = 1.8.0_65
