Java使用OSHI获取服务器信息

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 {

    @Test
    public 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 ticks
        long[] 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);
    }
}