Table of contents
1. Need to import dependent packages
2. The system comes with parameters
3. Obtain core information such as the current server status cpu, memory, storage, etc.
4. The method does not exist after the package is introduced
5. There is a gap between the obtained cpu utilization and the task manager cpu utilization value
1. Need to import dependent packages
<dependency>
<groupId>com.github.oshi</groupId>
<artifactId>oshi-core</artifactId>
<version>3.12.2</version>
</dependency>
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna</artifactId>
<version>5.2.0</version>
</dependency>
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna-platform</artifactId>
<version>5.2.0</version>
</dependency>
// 当期最新版本，最新版本与上面版本方法有所区别
<dependency>
<groupId>com.github.oshi</groupId>
<artifactId>oshi-core</artifactId>
<version>6.3.2</version>
</dependency>
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna</artifactId>
<version>5.12.1</version>
</dependency>
<dependency>
<groupId>net.java.dev.jna</groupId>
<artifactId>jna-platform</artifactId>
<version>5.12.1</version>
</dependency>2. The system comes with parameters
private static void systemParamsNameAndValue() {
Properties properties = System.getProperties();
Set<Map.Entry<Object, Object>> params = properties.entrySet();
for (Iterator<Map.Entry<Object, Object>> iterator = params.iterator(); iterator.hasNext();) {
Map.Entry<Object, Object> systemParam = iterator.next();
Object key = systemParam.getKey();
Object value = systemParam.getValue();
System.out.println("系统属性名: [" + key + "] ---------系统属性名字对应值: " + value);
}
}RESULT:
系统属性名: [java.runtime.name] ---------系统属性名字对应值: Java(TM) SE Runtime Environment
系统属性名: [sun.boot.library.path] ---------系统属性名字对应值: F:\jdk\jre\bin
系统属性名: [java.vm.version] ---------系统属性名字对应值: 25.291-b10
系统属性名: [java.vm.vendor] ---------系统属性名字对应值: Oracle Corporation
系统属性名: [java.vendor.url] ---------系统属性名字对应值: http://java.oracle.com/
系统属性名: [path.separator] ---------系统属性名字对应值: ;
系统属性名: [java.vm.name] ---------系统属性名字对应值: Java HotSpot(TM) 64-Bit Server VM
系统属性名: [file.encoding.pkg] ---------系统属性名字对应值: sun.io
系统属性名: [user.country] ---------系统属性名字对应值: CN
系统属性名: [user.script] ---------系统属性名字对应值:
系统属性名: [sun.java.launcher] ---------系统属性名字对应值: SUN_STANDARD
系统属性名: [sun.os.patch.level] ---------系统属性名字对应值:
系统属性名: [java.vm.specification.name] ---------系统属性名字对应值: Java Virtual Machine Specification
系统属性名: [user.dir] ---------系统属性名字对应值: F:\idea\workspace\
系统属性名: [java.runtime.version] ---------系统属性名字对应值: 1.8.0_291-b10
系统属性名: [java.awt.graphicsenv] ---------系统属性名字对应值: sun.awt.Win32GraphicsEnvironment
系统属性名: [java.endorsed.dirs] ---------系统属性名字对应值:
系统属性名: [os.arch] ---------系统属性名字对应值: amd64
系统属性名: [java.io.tmpdir] ---------系统属性名字对应值: C:\Users\ADMINI~1\AppData\Local\Temp\
系统属性名: [line.separator] ---------系统属性名字对应值:
系统属性名: [java.vm.specification.vendor] ---------系统属性名字对应值: Oracle Corporation
系统属性名: [user.variant] ---------系统属性名字对应值:
系统属性名: [os.name] ---------系统属性名字对应值: Windows 7
系统属性名: [sun.jnu.encoding] ---------系统属性名字对应值: GBK
系统属性名: [java.library.path] ---------系统属性名字对应值:
系统属性名: [java.specification.name] ---------系统属性名字对应值: Java Platform API Specification
系统属性名: [java.class.version] ---------系统属性名字对应值: 5.0
系统属性名: [sun.management.compiler] ---------系统属性名字对应值: HotSpot 64-Bit Tiered Compilers
系统属性名: [os.version] ---------系统属性名字对应值: 10.0
系统属性名: [user.home] ---------系统属性名字对应值: C:\Users\Administrator
系统属性名: [user.timezone] ---------系统属性名字对应值:
系统属性名: [java.awt.printerjob] ---------系统属性名字对应值: sun.awt.windows.WPrinterJob
系统属性名: [file.encoding] ---------系统属性名字对应值: UTF-8
系统属性名: [java.specification.version] ---------系统属性名字对应值: 1.8
系统属性名: [java.class.path] ---------系统属性名字对应值:
系统属性名: [user.name] ---------系统属性名字对应值: Administrator
系统属性名: [java.vm.specification.version] ---------系统属性名字对应值: 1.8
系统属性名: [sun.java.command] ---------系统属性名字对应值:
系统属性名: [java.home] ---------系统属性名字对应值: D:\jdk\jre
系统属性名: [sun.arch.data.model] ---------系统属性名字对应值: 64
系统属性名: [user.language] ---------系统属性名字对应值: zh
系统属性名: [java.specification.vendor] ---------系统属性名字对应值: Oracle Corporation
系统属性名: [awt.toolkit] ---------系统属性名字对应值: sun.awt.windows.WToolkit
系统属性名: [java.vm.info] ---------系统属性名字对应值: mixed mode
系统属性名: [java.version] ---------系统属性名字对应值: 1.8.0_291
系统属性名: [java.ext.dirs] ---------系统属性名字对应值:
系统属性名: [sun.boot.class.path] ---------系统属性名字对应值:
系统属性名: [java.vendor] ---------系统属性名字对应值: Oracle Corporation
系统属性名: [file.separator] ---------系统属性名字对应值: \
系统属性名: [java.vendor.url.bug] ---------系统属性名字对应值: http://bugreport.sun.com/bugreort/
系统属性名: [sun.io.unicode.encoding] ---------系统属性名字对应值: UnicodeLittle
系统属性名: [sun.cpu.endian] ---------系统属性名字对应值: little
系统属性名: [sun.desktop] ---------系统属性名字对应值: windows
系统属性名: [sun.cpu.isalist] ---------系统属性名字对应值: amd643. Obtain core information such as the current server status cpu, memory, storage, etc.
// 正确包
import com.sun.management.OperatingSystemMXBean;
/// 错误包
//import java.lang.management.OperatingSystemMXBean;
import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import java.io.File;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryUsage;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit; /***
* @author Benjamin
* @date 2022/12/8 10:02:50
* @version 1.0.0
* @description 获取系统详细参数信息
* @param
* @return void
*/
public static void initSystemInfo() {
Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(() -> {
try {
SystemInfo systemInfo = new SystemInfo();
OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
// 椎内存使用情况
MemoryUsage memoryUsage = memoryMXBean.getHeapMemoryUsage();
// 初始的总内存
long initTotalMemorySize = memoryUsage.getInit();
// 最大可用内存
long maxMemorySize = memoryUsage.getMax();
// 已使用的内存
long usedMemorySize = memoryUsage.getUsed();
// 操作系统
String osName = System.getProperty("os.name");
// 总的物理内存
String totalMemorySize = new DecimalFormat("#.##").format(osmxb.getTotalPhysicalMemorySize() / 1024.0 / 1024 / 1024) + "G";
// 剩余的物理内存
String freePhysicalMemorySize = new DecimalFormat("#.##").format(osmxb.getFreePhysicalMemorySize() / 1024.0 / 1024 / 1024) + "G";
// 已使用的物理内存
String usedMemory = new DecimalFormat("#.##").format((osmxb.getTotalPhysicalMemorySize() - osmxb.getFreePhysicalMemorySize()) / 1024.0 / 1024 / 1024) + "G";
// 获得线程总数
ThreadGroup parentThread;
for (parentThread = Thread.currentThread().getThreadGroup(); parentThread
.getParent() != null; parentThread = parentThread.getParent()) {
}
int totalThread = parentThread.activeCount();
// 磁盘使用情况
File[] files = File.listRoots();
for (File file : files) {
String total = new DecimalFormat("#.#").format(file.getTotalSpace() * 1.0 / 1024 / 1024 / 1024) + "G";
String free = new DecimalFormat("#.#").format(file.getFreeSpace() * 1.0 / 1024 / 1024 / 1024) + "G";
String un = new DecimalFormat("#.#").format(file.getUsableSpace() * 1.0 / 1024 / 1024 / 1024) + "G";
String path = file.getPath();
System.err.println(path + "总:" + total + ",可用空间:" + un + ",空闲空间:" + free);
System.err.println("=============================================");
}
System.err.println("操作系统:" + osName);
System.err.println("程序启动时间:" + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date(ManagementFactory.getRuntimeMXBean().getStartTime())));
/// System.err.println("pid:" + System.getProperty("PID"));
System.err.println("pid:" + getPID());
System.err.println("cpu核数:" + Runtime.getRuntime().availableProcessors());
printlnCpuInfo(systemInfo);
System.err.println("JAVA_HOME:" + System.getProperty("java.home"));
System.err.println("JAVA_VERSION:" + System.getProperty("java.version"));
System.err.println("USER_HOME:" + System.getProperty("user.home"));
System.err.println("USER_NAME:" + System.getProperty("user.name"));
System.err.println("初始的总内存(JVM):" + new DecimalFormat("#.#").format(initTotalMemorySize * 1.0 / 1024 / 1024) + "M");
System.err.println("最大可用内存(JVM):" + new DecimalFormat("#.#").format(maxMemorySize * 1.0 / 1024 / 1024) + "M");
System.err.println("已使用的内存(JVM):" + new DecimalFormat("#.#").format(usedMemorySize * 1.0 / 1024 / 1024) + "M");
System.err.println("总的物理内存:" + totalMemorySize);
System.err.println("总的物理内存:" + new DecimalFormat("#.##").format(systemInfo.getHardware().getMemory().getTotal() * 1.0 / 1024 / 1024 / 1024) + "M");
System.err.println("剩余的物理内存:" + freePhysicalMemorySize);
System.err.println("剩余的物理内存:" + new DecimalFormat("#.##").format(systemInfo.getHardware().getMemory().getAvailable() * 1.0 / 1024 / 1024 / 1024) + "M");
System.err.println("已使用的物理内存:" + usedMemory);
System.err.println("已使用的物理内存:" + new DecimalFormat("#.##").format((systemInfo.getHardware().getMemory().getTotal() - systemInfo.getHardware().getMemory().getAvailable()) * 1.0 / 1024 / 1024 / 1024) + "M");
System.err.println("总线程数:" + totalThread);
System.err.println("===========================");
} catch (Exception e) {
e.printStackTrace();
}
}, 0, 60, TimeUnit.SECONDS);
}
/**
* 打印 CPU 信息
* @param systemInfo
*/
private static void printlnCpuInfo(SystemInfo systemInfo) throws InterruptedException {
// todo 解决 Why does OSHI's System and Processor CPU usage differ from the Windows Task Manager?
GlobalConfig.set(GlobalConfig.OSHI_OS_WINDOWS_CPU_UTILITY, true);
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.err.println("cpu核数:" + processor.getLogicalProcessorCount());
System.err.println("cpu系统使用率:" + new DecimalFormat("#.##%").format(cSys * 1.0 / totalCpu));
System.err.println("cpu用户使用率:" + new DecimalFormat("#.##%").format(user * 1.0 / totalCpu));
System.err.println("cpu当前等待率:" + new DecimalFormat("#.##%").format(iowait * 1.0 / totalCpu));
System.err.println("cpu当前空闲率:" + new DecimalFormat("#.##%").format(idle * 1.0 / totalCpu));
// todo cup利用
// user + system + nice + iowait + irq + softirq + steal
long cpuUtilization = user + nice + cSys + iowait + irq + softirq + steal;
System.err.println("cpu利用率：" + new DecimalFormat("#.##%").format(cpuUtilization * 1.0 / totalCpu));
// hutool工具，底层用的也是oshi
/*
GlobalConfig.set(GlobalConfig.OSHI_OS_WINDOWS_CPU_UTILITY, true);
cn.hutool.system.oshi.CpuInfo cpuInfo = OshiUtil.getCpuInfo();
double free = cpuInfo.getFree();
DecimalFormat format = new DecimalFormat("#.00");
System.out.println("cpu利用率：" + Double.parseDouble(format.format(100.0D - free)));
*/
/// 低版本这两个方法是无参方法,高版本中是需要有参数的
//System.err.format("CPU load: %.1f%% (counting ticks)%n", processor.getSystemCpuLoadBetweenTicks(ticksArray) * 100);
//System.err.format("CPU load: %.1f%% (OS MXBean)%n", processor.getSystemCpuLoad(1L) * 100);
long[] ticksArray = {1,2,3,4,5,6,7,8};
System.err.format("CPU load: %.1f%% (counting ticks)%n", processor.getSystemCpuLoadBetweenTicks(ticksArray) * 100);
System.err.format("CPU load: %.1f%% (OS MXBean)%n", processor.getSystemCpuLoad(1L) * 100);
ProcessorIdentifierInfo(processor);
}
/**
* 获取进程id
* @return
*/
public static String getPID() {
String name = ManagementFactory.getRuntimeMXBean().getName();
return name.split("@")[0];
}
public static void ProcessorIdentifierInfo(CentralProcessor processor) {
CentralProcessor.ProcessorIdentifier processorIdentifier = processor.getProcessorIdentifier();
String vendor = processorIdentifier.getVendor();
String name = processorIdentifier.getName();
String family = processorIdentifier.getFamily();
String model = processorIdentifier.getModel();
String stepping = processorIdentifier.getStepping();
String processorID = processorIdentifier.getProcessorID();
// cpu64bit ? "Intel64" : "x86"
// Intel64 Family 6 Model 142 Stepping 12
String identifier = processorIdentifier.getIdentifier();
long vendorFreq = processorIdentifier.getVendorFreq();
System.out.println("vendor: " + vendor);
// 处理器名字
System.out.println("name: " + name);
System.out.println("family: " + family);
System.out.println("model: " + model);
System.out.println("stepping: " + stepping);
System.out.println("processorID: " + processorID);
System.out.println("identifier: " + identifier);
System.out.println("vendorFreq: " + vendorFreq);
}RESULT:
4. The method does not exist after the package is introduced
The following packages need to be imported:
// 正确包
import com.sun.management.OperatingSystemMXBean;
/// 错误包
//import java.lang.management.OperatingSystemMXBean;5. There is a gap between the obtained cpu utilization and the task manager cpu utilization value
It needs to be configured before the CentralProcessor is instantiated: there will be a gap in the configuration, and the relative accuracy is higher.
GlobalConfig.set(GlobalConfig.OSHI_OS_WINDOWS_CPU_UTILITY, true);For details, see Lead developer of Oshi Daniel Widdis github:
oshi/FAQ.md at master oshi/oshi GitHub Native Operating System and Hardware Information. Contribute to oshi/oshi development by creating an account on GitHub. 
https://github.com/oshi/oshi/blob/master/src /site/markdown/FAQ.md reference blog:Solve the problem that the CPU usage of Oshi does not match the display of Windows Task Manager_CTimet's Blog-CSDN Blog