OSHI可以获取系统信息（CPU、内存、磁盘、网络等），纯Java实现（通过JNA访问本地API，无需安装本地库），跨平台支持。

引入依赖

<dependency><groupId>com.github.oshi</groupId><artifactId>oshi-core</artifactId><version>6.6.5</version>
</dependency>

编写测试用例

import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;
import oshi.SystemInfo;
import oshi.hardware.*;
import oshi.software.os.OSProcess;
import oshi.software.os.OperatingSystem;import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.List;@Slf4j
public class ResourceMonitorTest {@Testpublic void testGetResource() {// 获取系统信息SystemInfo si = new SystemInfo();// 获取硬件抽象层HardwareAbstractionLayer hardware = si.getHardware();log.info("===============================CPU信息===============================");CentralProcessor processor = hardware.getProcessor();CentralProcessor.ProcessorIdentifier processorIdentifier = processor.getProcessorIdentifier();String processorName = processorIdentifier.getName();log.info("CPU 名称: {}", processorName);String vendor = processorIdentifier.getVendor();log.info("CPU 供应商: {}", vendor);long cpuFreq = processorIdentifier.getVendorFreq();log.info("CPU 频率: {}", cpuFreq);int logicalProcessorCount = processor.getLogicalProcessorCount();log.info("CPU 核心数: {}", logicalProcessorCount);int physicalProcessorCount = processor.getPhysicalProcessorCount();log.info("CPU 物理核心数: {}", physicalProcessorCount);// CPU 负载 (最近1/5/15分钟)double[] loadAverage = processor.getSystemLoadAverage(3);log.info("CPU 负载: {}", loadAverage[0]);log.info("===============================实时 CPU 使用率===============================");// 第一次调用获取 tickslong[] prevTicks = processor.getSystemCpuLoadTicks();// 等待1秒try {Thread.sleep(1000);} catch (InterruptedException e) {Thread.currentThread().interrupt();}// 第二次调用计算使用率long[] ticks = processor.getSystemCpuLoadTicks();long user = ticks[CentralProcessor.TickType.USER.getIndex()] - prevTicks[CentralProcessor.TickType.USER.getIndex()];log.info("应用程序CPU使用率：{}", user);long nice = ticks[CentralProcessor.TickType.NICE.getIndex()] - prevTicks[CentralProcessor.TickType.NICE.getIndex()];log.info("应用程序优先CPU使用率：{}", nice);long sys = ticks[CentralProcessor.TickType.SYSTEM.getIndex()] - prevTicks[CentralProcessor.TickType.SYSTEM.getIndex()];log.info("系统程序CPU使用率：{}", sys);long idle = ticks[CentralProcessor.TickType.IDLE.getIndex()] - prevTicks[CentralProcessor.TickType.IDLE.getIndex()];log.info("CPU空闲时间：{}", idle);long iowait = ticks[CentralProcessor.TickType.IOWAIT.getIndex()] - prevTicks[CentralProcessor.TickType.IOWAIT.getIndex()];log.info("CPU等待率：{}", iowait);long irq = ticks[CentralProcessor.TickType.IRQ.getIndex()] - prevTicks[CentralProcessor.TickType.IRQ.getIndex()];log.info("CPU中断率：{}", irq);long softirq = ticks[CentralProcessor.TickType.SOFTIRQ.getIndex()] - prevTicks[CentralProcessor.TickType.SOFTIRQ.getIndex()];log.info("CPU软中断率：{}", softirq);long steal = ticks[CentralProcessor.TickType.STEAL.getIndex()] - prevTicks[CentralProcessor.TickType.STEAL.getIndex()];log.info("CPU抢占率：{}", steal);long totalCpu = user + nice + sys + idle + iowait + irq + softirq + steal;log.info("CPU总使用率：{}", totalCpu);// 计算各状态百分比double cpuUsage = 100d * (totalCpu - idle) / totalCpu;log.info("CPU使用率：{}", cpuUsage);double ioWaitPercent = 100d * iowait / totalCpu;log.info("IO等待使用率：{}", ioWaitPercent);log.info("===============================内存信息===============================");GlobalMemory memory = hardware.getMemory();double gbNum = 1024.0 * 1024.0 * 1024.0;// 总内存 (bytes)long totalMemory = memory.getTotal();BigDecimal totalMemoryDec = new BigDecimal(totalMemory / gbNum).setScale(2, RoundingMode.HALF_UP);log.info("总内存：{}GB", totalMemoryDec);// 可用内存 (bytes)long availableMemory = memory.getAvailable();BigDecimal availableMemoryDec = new BigDecimal(availableMemory / gbNum).setScale(2, RoundingMode.HALF_UP);log.info("可用内存：{}GB", availableMemoryDec);// 已用内存 (bytes)long usedMemory = totalMemory - availableMemory;BigDecimal usedMemoryDec = new BigDecimal(usedMemory / gbNum).setScale(2, RoundingMode.HALF_UP);log.info("已用内存：{}GB", usedMemoryDec);// 交换空间信息long totalSwap = memory.getVirtualMemory().getSwapTotal();BigDecimal totalSwapDec = new BigDecimal(totalSwap / gbNum).setScale(2, RoundingMode.HALF_UP);log.info("总交换空间：{}GB", totalSwapDec);long usedSwap = memory.getVirtualMemory().getSwapUsed();BigDecimal usedSwapDec = new BigDecimal(usedSwap / gbNum).setScale(2, RoundingMode.HALF_UP);log.info("已用交换空间：{}GB", usedSwapDec);// 内存使用率double memoryUsagePercent = 100d * usedMemory / totalMemory;BigDecimal memoryUsagePercentDec = new BigDecimal(memoryUsagePercent / gbNum).setScale(2, RoundingMode.HALF_UP);log.info("内存使用率：{}%", memoryUsagePercentDec);log.info("===============================磁盘设备信息===============================");List<HWDiskStore> diskStores = hardware.getDiskStores();for (HWDiskStore disk : diskStores) {String name = disk.getName();String model = disk.getModel();log.info("磁盘：{}，磁盘型号：{}", name, model);long size = disk.getSize();BigDecimal sizeDec = new BigDecimal(size / gbNum).setScale(2, RoundingMode.HALF_UP);log.info("磁盘：{}，磁盘大小：{}GB", name, sizeDec);long reads = disk.getReads();log.info("磁盘：{}，读取次数：{}", name, reads);long readBytes = disk.getReadBytes();log.info("磁盘：{}，读取字节数：{}", name, readBytes);long writes = disk.getWrites();log.info("磁盘：{}，写入次数：{}", name, writes);long writeBytes = disk.getWriteBytes();log.info("磁盘：{}，写入字节数：{}", name, writeBytes);long transferTime = disk.getTransferTime();log.info("磁盘：{}，传输时间：{}", name, transferTime);}log.info("===============================网络接口信息===============================");List<NetworkIF> networkIFs = hardware.getNetworkIFs();for (NetworkIF net : networkIFs) {String name = net.getName();String displayName = net.getDisplayName();log.info("网络接口：{}，显示名称：{}", name, displayName);String mac = net.getMacaddr();log.info("网络接口：{}，MAC地址：{}", name, mac);long mtu = net.getMTU();log.info("网络接口：{}，MTU值：{}", name, mtu);long speed = net.getSpeed();log.info("网络接口：{}，网卡速度：{}", name, speed);String[] ipv4 = net.getIPv4addr();log.info("网络接口：{}，IPv4 地址：{}", name, ipv4);String[] ipv6 = net.getIPv6addr();log.info("网络接口：{}，IPv6 地址：{}", name, ipv6);}// 第一次获取数据long bytesRecv = 0L;long bytesSent = 0L;for (NetworkIF net : networkIFs) {net.updateAttributes();bytesRecv = net.getBytesRecv();bytesSent = net.getBytesSent();long packetsRecv = net.getPacketsRecv();long packetsSent = net.getPacketsSent();}// 等待1秒try {Thread.sleep(1000);} catch (InterruptedException e) {Thread.currentThread().interrupt();}// 第二次获取并计算速率for (NetworkIF net : networkIFs) {net.updateAttributes();long newRecv = net.getBytesRecv();long newSent = net.getBytesSent();// 计算每秒接收/发送的字节数long recvRate = newRecv - bytesRecv;long sentRate = newSent - bytesSent;log.info("网卡 {} 接收 {} 字节/秒, 发送 {} 字节/秒", net.getName(), recvRate, sentRate);}log.info("===============================操作系统信息===============================");OperatingSystem os = si.getOperatingSystem();String family = os.getFamily();log.info("操作系统 {}", family);String manufacturer = os.getManufacturer();log.info("操作系统制造商 {}", manufacturer);OperatingSystem.OSVersionInfo versionInfo = os.getVersionInfo();log.info("操作系统版本 {}", versionInfo.toString());long uptime = os.getSystemUptime();log.info("系统启动时间 {}", uptime);int processCount = os.getProcessCount();log.info("进程数量 {}", processCount);int threadCount = os.getThreadCount();log.info("线程数量 {}", threadCount);OSProcess currentProcess = os.getProcess(os.getProcessId());log.info("当前进程 {}", currentProcess.getName());long processMemory = currentProcess.getResidentSetSize();log.info("进程内存占用 {}", processMemory);double processCpuLoad = currentProcess.getProcessCpuLoadBetweenTicks(currentProcess);log.info("进程CPU使用率 {}", processCpuLoad);}
}