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maven 引用

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

取得 cpu信息 示例

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);} }

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獲取jvm數據

jvm數據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，查看相關指標數據，但是在線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代碼來獲得數據，然后上報出去，然后在外部通過展示。

那么如何通過java代碼來得到這些參數呢？

獲得jvm的堆內存代碼

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的非堆內存代碼

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的堆和非堆的整體數據，一般都知道堆和非堆里面都幾個不同的區，用來做不同功能，那么如何得到不同區的數據呢？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。

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總結

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