java 通用取得 系統硬體資訊及 jvm 資訊的 jar 包 oshi-core

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maven 引用

<dependency>    <groupId>com.github.dblock</groupId>    <artifactId>oshi-core</artifactId>    <version>LATEST</version></dependency>

取得 cpu資訊 樣本

import oshi.SystemInfo;import oshi.hardware.CentralProcessor;import oshi.hardware.HardwareAbstractionLayer;import oshi.software.os.OperatingSystem;public class ComputerIdentifier{    public static String generateLicenseKey() throws Exception    {        SystemInfo systemInfo = new SystemInfo();        OperatingSystem operatingSystem = systemInfo.getOperatingSystem();        HardwareAbstractionLayer hardwareAbstractionLayer = systemInfo.getHardware();        CentralProcessor centralProcessor = hardwareAbstractionLayer.getProcessor();        String vendor = operatingSystem.getManufacturer();        String processorSerialNumber = centralProcessor.getSystemSerialNumber();        String processorIdentifier = centralProcessor.getIdentifier();        int processors = centralProcessor.getLogicalProcessorCount();        String delimiter = "#";        return vendor +                delimiter +                processorSerialNumber +                delimiter +                processorIdentifier +                delimiter +                processors;    }    public static void main(String[] arguments) throws Exception    {        String identifier = generateLicenseKey();        System.out.println(identifier);    }}

 

擷取jvm資料

jvm資料是監控應用很重要的一系列參數，一般本地開發的時候可以通過jconsole來連到對應的進程上面，查看相關指標資料，但是線上上環境就不適合通過jconsole來查看了， 所以我們現在使用通過java代碼來獲得資料，然後上報出去，然後在外部通過展示。

那麼如何通過java代碼來得到這些參數呢？

獲得jvm的堆記憶體代碼

MemoryUsage heapMemoryUsage = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();System.out.println("jvm.heap.init is " + (heapMemoryUsage.getInit()));System.out.println("jvm.heap.used is " + (heapMemoryUsage.getUsed()));System.out.println("jvm.heap.committed is " + (heapMemoryUsage.getCommitted()));System.out.println("jvm.heap.max is " + (heapMemoryUsage.getMax()));

獲得jvm的非堆記憶體代碼

MemoryUsage nonHeapMemoryUsage = ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage();System.out.println("jvm.nonheap.init is " + (nonHeapMemoryUsage.getInit()));System.out.println("jvm.nonheap.used is " + (nonHeapMemoryUsage.getUsed()));System.out.println("jvm.nonheap.committed is " + (nonHeapMemoryUsage.getCommitted()));System.out.println("jvm.nonheap.max is " + (nonHeapMemoryUsage.getMax()));

上面的方法只能得到jvm的堆和非堆的整體資料，一般都知道堆和非堆裡面都幾個不同的區，用來做不同功能，那麼如何得到不同區的資料呢？不多說，上代碼

for (MemoryPoolMXBean pool : ManagementFactory.getMemoryPoolMXBeans()) {  final String kind = pool.getType() == MemoryType.HEAP ? "heap" : "nonheap";  final MemoryUsage usage = pool.getUsage();  System.out.println("kind is " + kind + ", pool name is " + pool.getName() + ", jvm." + pool.getName() + ".init is " + usage.getInit());  System.out.println("kind is " + kind + ", pool name is " + pool.getName() + ", jvm." + pool.getName() + ".used is " + usage.getUsed());  System.out.println("kind is " + kind + ", pool name is " + pool.getName() + ", jvm." + pool.getName()+ ".committed is " + usage.getCommitted());  System.out.println("kind is " + kind + ", pool name is " + pool.getName() + ", jvm." + pool.getName() + ".max is " + usage.getMax()); }

這樣就可以得到各種區的具體參數。

 

java 通用取得 系統硬體資訊及 jvm 資訊的 jar 包 oshi-core