java获取系统CPU和内存使用率的三种方法

2024-06-30 23:03| 来源: 网络整理| 查看: 265

获取系统CPU和内存的三种方法： 1、使用OperatingSystemMXBean获取 2、使用sigar方法获取 3、使用oshi方法获取

以下是我在我的机子上对三种方法测试的比较

方法准确率OperatingSystemMXBean获取的内存数据准确，CPU差距有点大sigar获取的内存数据稍微有点差距，CPU相对OSMXB好一点oshi获取的内存数据准确，CPU相对于其他两种方法差距最小

第二种和第三种方法还适用于Linux系统

1、使用OperatingSystemMXBean获取系统CPU、内存 import java.lang.management.ManagementFactory; import com.sun.management.OperatingSystemMXBean; import lombok.extern.slf4j.Slf4j; @SuppressWarnings("restriction") @Slf4j public class test { private static OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean(); public static void main(String[] args) throws InterruptedException { while(true) { //获取CPU double cpuLoad = osmxb.getSystemCpuLoad(); int percentCpuLoad = (int) (cpuLoad * 100); //获取内存 double totalvirtualMemory = osmxb.getTotalPhysicalMemorySize(); double freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize(); double value = freePhysicalMemorySize/totalvirtualMemory; int percentMemoryLoad = (int) ((1-value)*100); log.info("CPU = {},Mem = {}", percentCpuLoad,percentMemoryLoad); Thread.sleep(1000); } } }

如下是控制台打印的日志信息在这里插入图片描述

2.使用sigar方法获取系统CPU、内存

使用此方法需要使用到外部组件，我这里刚好有，可以自行下载sigar百度分享地址，提取码：6ijt。如果是Windows系统需要将sigar-amd64-winnt.dll文件放到到C:\Windows\System32 如果是Linux系统需要将libsigar-amd64-linux.so文件放到/usr/lib64 需要在maven中添加依赖：

org.fusesource sigar 1.6.4 maven-ali http://maven.aliyun.com/nexus/content/groups/public// true true always fail

sigar获取CPU信息代码

import java.util.Properties; import org.hyperic.sigar.CpuInfo; import org.hyperic.sigar.CpuPerc; import org.hyperic.sigar.Sigar; import org.hyperic.sigar.SigarException; import lombok.extern.slf4j.Slf4j; @Slf4j public class test { public static void main(String[] args) throws InterruptedException, SigarException { while(true) { Properties props = System.getProperties(); String systemName = props.getProperty("os.name"); Sigar sigar = new Sigar(); CpuInfo[] infos = sigar.getCpuInfoList(); CpuInfo infoss = infos[0]; CpuPerc cpu = sigar.getCpuPerc(); Integer totalCPUs = infoss.getTotalCores(); String CPUinfo = infoss.getVendor() + " " + infoss.getModel(); double referenceSpeed = infoss.getMhz(); String CPUSpeed = String.format("%.2f", referenceSpeed / 1000) + " GHz"; double cpuUsedPerc = cpu.getCombined(); String CPUPers = ""; if(systemName.startsWith("win") || systemName.startsWith("Win")) { CPUPers = String.format("%.1f", cpuUsedPerc * 100) + "%"; }else { CPUPers = String.format("%.1f", cpuUsedPerc * 1000) + "%"; } log.info("CPU信息 = {}，CPU总数 = {},CPU基准速度 ={},CPU利用率 ={}",CPUinfo,totalCPUs,CPUSpeed,CPUPers); Thread.sleep(1000); sigar.close(); } } }

以下是控制台打印的CPU信息 shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxODY2MTM4,size_16,color_FFFFFF,t_70) sigar获取内存信息代码

import org.hyperic.sigar.Sigar; import org.hyperic.sigar.SigarException; import lombok.extern.slf4j.Slf4j; @Slf4j public class test { public static void main(String[] args) throws InterruptedException, SigarException { while(true) { Sigar sigar = new Sigar(); double memTotal = sigar.getMem().getTotal(); double memUsedPerc = sigar.getMem().getUsedPercent(); String memory = String.format("%.0f", memTotal / 1024 / 1024 / 1024) + " GB"; String memoryUsage = String.format("%.2f", memUsedPerc) + " %"; log.info("内存 = {}，内存使用率 = {}",memory,memoryUsage); Thread.sleep(1000); sigar.close(); } } }

以下是控制台打印的内存信息在这里插入图片描述

3.使用oshi方法获取系统CPU、内存

需要在maven中添加依赖：

com.github.oshi oshi-core 3.5.0 maven-ali http://maven.aliyun.com/nexus/content/groups/public// true true always fail

oshi获取CPU代码

import java.text.DecimalFormat; import org.hyperic.sigar.SigarException; import lombok.extern.slf4j.Slf4j; import oshi.SystemInfo; import oshi.hardware.CentralProcessor; @Slf4j public class test { public static void main(String[] args) throws InterruptedException, SigarException { while(true) { SystemInfo systemInfo = new SystemInfo(); CentralProcessor processor = systemInfo.getHardware().getProcessor(); long[] prevTicks = processor.getSystemCpuLoadTicks(); 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; log.info("CPU总数 = {},CPU利用率 ={}",processor.getLogicalProcessorCount(),new DecimalFormat("#.##%").format(1.0-(idle * 1.0 / totalCpu))); Thread.sleep(1000); } } }

以下是打印信息在这里插入图片描述 oshi获取内存信息代码

import java.text.DecimalFormat; import org.hyperic.sigar.SigarException; import lombok.extern.slf4j.Slf4j; import oshi.SystemInfo; import oshi.hardware.GlobalMemory; @Slf4j public class test { public static void main(String[] args) throws InterruptedException, SigarException { while(true) { SystemInfo systemInfo = new SystemInfo(); GlobalMemory memory = systemInfo.getHardware().getMemory(); long totalByte = memory.getTotal(); long acaliableByte = memory.getAvailable(); log.info("内存大小 = {},内存使用率 ={}",formatByte(totalByte),new DecimalFormat("#.##%").format((totalByte-acaliableByte)*1.0/totalByte)); Thread.sleep(1000); } } public static String formatByte(long byteNumber){ double FORMAT = 1024.0; double kbNumber = byteNumber/FORMAT; if(kbNumber

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