目录

1.需要导入依赖包

 2.系统自带参数

3.获取当前服务器状态cpu、内存、存储等核心信息

 4.引入包后方法不存在

 5. 获取的cpu利用率和任务管理器cpu利用率值差距问题

---

1.需要导入依赖包

<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.系统自带参数

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: amd64

3.获取当前服务器状态cpu、内存、存储等核心信息

// 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.引入包后方法不存在

 需要引入下面的包：

// 正确包
import com.sun.management.OperatingSystemMXBean;
/// 错误包
//import java.lang.management.OperatingSystemMXBean;

 5. 获取的cpu利用率和任务管理器cpu利用率值差距问题

 就是需要配置在CentralProcessor实例化之前：配置上也会有差距，相对准确率高一些。

GlobalConfig.set(GlobalConfig.OSHI_OS_WINDOWS_CPU_UTILITY, true);

具体可以看 Lead delveloper of Oshi Daniel Widdis github:

oshi/FAQ.md at master · oshi/oshi · GitHubNative 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参考博客：解决Oshi获取CPU使用率与Windows任务管理器显示不匹配的问题_CTimet的博客-CSDN博客