使用系统参数

参数	描述
java.version	Java 运行时环境版本
java.vendor	Java 运行时环境供应商
java.vendor.url	Java 供应商的 URL
java.home	Java 安装目录
java.vm.specification.version	Java 虚拟机规范版本
java.vm.specification.vendor	Java 虚拟机规范供应商
java.vm.specification.name	Java 虚拟机规范名称
java.vm.version	Java 虚拟机实现版本
java.vm.vendor	Java 虚拟机实现供应商
java.vm.name	Java 虚拟机实现名称
java.specification.version	Java 运行时环境规范版本
java.specification.vendor	Java 运行时环境规范供应商
java.specification.name	Java 运行时环境规范名称
java.class.version	Java 类格式版本号
java.class.path	Java 类路径
java.library.path 加载库时搜索的路径列表
java.io.tmpdir	默认的临时文件路径
java.compiler	要使用的 JIT 编译器的名称
java.ext.dirs	一个或多个扩展目录的路径
os.name	操作系统的名称
os.arch	操作系统的架构
os.version	操作系统的版本
file.separator	文件分隔符（在 UNIX 系统中是“/”）
path.separator	路径分隔符（在 UNIX 系统中是“:”）
line.separator	行分隔符（在 UNIX 系统中是“/n”）
user.name	用户的账户名称
user.home	用户的主目录
user.dir	用户的当前工作目录

使用

System.getProperty("user.dir")

使用OSHI

Maven

<dependency>
    <groupId>com.github.oshi</groupId>
    <artifactId>oshi-core</artifactId>
    <version>6.4.4</version>
</dependency>

Gradle

implementation group: 'com.github.oshi', name: 'oshi-core', version: '6.4.4'

使用

public class OshiUtil {

    public static void main(String[] args) {

        System.out.println("Initializing System...");
        SystemInfo si = new SystemInfo();

        HardwareAbstractionLayer hal = si.getHardware();
        OperatingSystem os = si.getOperatingSystem();

        System.out.println(os);

        System.out.println("Checking computer system...");
        printComputerSystem(hal.getComputerSystem());

        System.out.println("Checking Processor...");
        printProcessor(hal.getProcessor());

        System.out.println("Checking Memory...");
        printMemory(hal.getMemory());

        System.out.println("Checking CPU...");
        printCpu(hal.getProcessor());

        System.out.println("Checking Processes...");
        printProcesses(os, hal.getMemory());

        System.out.println("Checking Sensors...");
        printSensors(hal.getSensors());

        System.out.println("Checking Power sources...");
        printPowerSources(hal.getPowerSources());

        System.out.println("Checking Disks...");
        printDisks(hal.getDiskStores());

        System.out.println("Checking File System...");
        printFileSystem(os.getFileSystem());

        System.out.println("Checking Network interfaces...");
        printNetworkInterfaces(hal.getNetworkIFs());

        System.out.println("Checking Network parameterss...");
        printNetworkParameters(os.getNetworkParams());

        // hardware: displays
        System.out.println("Checking Displays...");
        printDisplays(hal.getDisplays());

        // hardware: USB devices
        //System.out.println("Checking USB Devices...");
        //printUsbDevices(hal.getUsbDevices(true));
    }

    private static void printComputerSystem(final ComputerSystem computerSystem) {

        System.out.println("manufacturer: " + computerSystem.getManufacturer());
        System.out.println("model: " + computerSystem.getModel());
        System.out.println("serialnumber: " + computerSystem.getSerialNumber());
        final Firmware firmware = computerSystem.getFirmware();
        System.out.println("firmware:");
        System.out.println("  manufacturer: " + firmware.getManufacturer());
        System.out.println("  name: " + firmware.getName());
        System.out.println("  description: " + firmware.getDescription());
        System.out.println("  version: " + firmware.getVersion());
//      System.out.println("  release date: " + (firmware.getReleaseDate() == null ? "unknown": firmware.getReleaseDate() == null ? "unknown" : FormatUtil.formatDate(firmware.getReleaseDate())));
        final Baseboard baseboard = computerSystem.getBaseboard();
        System.out.println("baseboard:");
        System.out.println("  manufacturer: " + baseboard.getManufacturer());
        System.out.println("  model: " + baseboard.getModel());
        System.out.println("  version: " + baseboard.getVersion());
        System.out.println("  serialnumber: " + baseboard.getSerialNumber());
    }

    private static void printProcessor(CentralProcessor processor) {
        System.out.println(processor);
        System.out.println(" " + processor.getPhysicalPackageCount() + " physical CPU package(s)");
        System.out.println(" " + processor.getPhysicalProcessorCount() + " physical CPU core(s)");
        System.out.println(" " + processor.getLogicalProcessorCount() + " logical CPU(s)");

        System.out.println("Identifier: " + processor.getProcessorIdentifier());
        System.out.println("ProcessorID: " + processor.getProcessorIdentifier().getProcessorID());
    }

    private static void printMemory(GlobalMemory memory) {
        System.out.println("Memory: " + FormatUtil.formatBytes(memory.getAvailable()) + "/"
                + FormatUtil.formatBytes(memory.getTotal()));
        System.out.println("Swap used: " + FormatUtil.formatBytes(memory.getVirtualMemory().getSwapUsed()) + "/"
                + FormatUtil.formatBytes(memory.getVirtualMemory().getSwapTotal()));
    }

    private static void printCpu(CentralProcessor processor) {
        System.out.println(
                "Context Switches/Interrupts: " + processor.getContextSwitches() + " / " + processor.getInterrupts());

        long[] prevTicks = processor.getSystemCpuLoadTicks();
        System.out.println("CPU, IOWait, and IRQ ticks @ 0 sec:" + Arrays.toString(prevTicks));
        // Wait a second...
        Util.sleep(1000);
        long[] ticks = processor.getSystemCpuLoadTicks();
        System.out.println("CPU, IOWait, and IRQ ticks @ 1 sec:" + Arrays.toString(ticks));
        long user = ticks[TickType.USER.getIndex()] - prevTicks[TickType.USER.getIndex()];
        long nice = ticks[TickType.NICE.getIndex()] - prevTicks[TickType.NICE.getIndex()];
        long sys = ticks[TickType.SYSTEM.getIndex()] - prevTicks[TickType.SYSTEM.getIndex()];
        long idle = ticks[TickType.IDLE.getIndex()] - prevTicks[TickType.IDLE.getIndex()];
        long iowait = ticks[TickType.IOWAIT.getIndex()] - prevTicks[TickType.IOWAIT.getIndex()];
        long irq = ticks[TickType.IRQ.getIndex()] - prevTicks[TickType.IRQ.getIndex()];
        long softirq = ticks[TickType.SOFTIRQ.getIndex()] - prevTicks[TickType.SOFTIRQ.getIndex()];
        long steal = ticks[TickType.STEAL.getIndex()] - prevTicks[TickType.STEAL.getIndex()];
        long totalCpu = user + nice + sys + idle + iowait + irq + softirq + steal;

        System.out.format(
                "User: %.1f%% Nice: %.1f%% System: %.1f%% Idle: %.1f%% IOwait: %.1f%% IRQ: %.1f%% SoftIRQ: %.1f%% Steal: %.1f%%%n",
                100d * user / totalCpu, 100d * nice / totalCpu, 100d * sys / totalCpu, 100d * idle / totalCpu,
                100d * iowait / totalCpu, 100d * irq / totalCpu, 100d * softirq / totalCpu, 100d * steal / totalCpu);
        System.out.format("CPU load: %.1f%% (counting ticks)%n", processor.getSystemCpuLoadBetweenTicks(prevTicks) * 100);
        //System.out.format("CPU load: %.1f%% (OS MXBean)%n", processor.getSystemCpuLoad() * 100);
        double[] loadAverage = processor.getSystemLoadAverage(3);
        System.out.println("CPU load averages:" + (loadAverage[0] < 0 ? " N/A" : String.format(" %.2f", loadAverage[0]))
                + (loadAverage[1] < 0 ? " N/A" : String.format(" %.2f", loadAverage[1]))
                + (loadAverage[2] < 0 ? " N/A" : String.format(" %.2f", loadAverage[2])));
        // per core CPU
//      StringBuilder procCpu = new StringBuilder("CPU load per processor:");
//      double[] load = processor.getProcessorCpuLoadBetweenTicks();
//      for (double avg : load) {
//          procCpu.append(String.format(" %.1f%%", avg * 100));
//      }
//      System.out.println(procCpu.toString());
    }

    private static void printProcesses(OperatingSystem os, GlobalMemory memory) {
        System.out.println("Processes: " + os.getProcessCount() + ", Threads: " + os.getThreadCount());
        // Sort by highest CPU


        List<OSProcess> procs = os.getProcesses( );

        System.out.println("   PID  %CPU %MEM       VSZ       RSS Name");
        for (int i = 0; i < procs.size() && i < 5; i++) {
            OSProcess p = procs.get(i);
            System.out.format(" %5d %5.1f %4.1f %9s %9s %s%n", p.getProcessID(),
                    100d * (p.getKernelTime() + p.getUserTime()) / p.getUpTime(),
                    100d * p.getResidentSetSize() / memory.getTotal(), FormatUtil.formatBytes(p.getVirtualSize()),
                    FormatUtil.formatBytes(p.getResidentSetSize()), p.getName());
        }
    }

    private static void printSensors(Sensors sensors) {
        System.out.println("Sensors:");
        System.out.format(" CPU Temperature: %.1f°C%n", sensors.getCpuTemperature());
        System.out.println(" Fan Speeds: " + Arrays.toString(sensors.getFanSpeeds()));
        System.out.format(" CPU Voltage: %.1fV%n", sensors.getCpuVoltage());
    }

    private static void printPowerSources(List<PowerSource> list) {
        StringBuilder sb = new StringBuilder("Power: ");
        if (list.size() == 0) {
            sb.append("Unknown");
        } else {
            double timeRemaining = list.get(0).getTimeRemainingInstant();
            if (timeRemaining < -1d) {
                sb.append("Charging");
            } else if (timeRemaining < 0d) {
                sb.append("Calculating time remaining");
            } else {
                sb.append(String.format("%d:%02d remaining", (int) (timeRemaining / 3600),
                        (int) (timeRemaining / 60) % 60));
            }
        }
        for (PowerSource pSource : list) {
            sb.append(String.format("%n %s @ %.1f%%", pSource.getName(), pSource.getRemainingCapacityPercent() * 100d));
        }
        System.out.println(sb.toString());
    }

    private static void printDisks(List<HWDiskStore> list) {
        System.out.println("Disks:");
        for (HWDiskStore disk : list) {
            boolean readwrite = disk.getReads() > 0 || disk.getWrites() > 0;
            System.out.format(" %s: (model: %s - S/N: %s) size: %s, reads: %s (%s), writes: %s (%s), xfer: %s ms%n",
                    disk.getName(), disk.getModel(), disk.getSerial(),
                    disk.getSize() > 0 ? FormatUtil.formatBytesDecimal(disk.getSize()) : "?",
                    readwrite ? disk.getReads() : "?", readwrite ? FormatUtil.formatBytes(disk.getReadBytes()) : "?",
                    readwrite ? disk.getWrites() : "?", readwrite ? FormatUtil.formatBytes(disk.getWriteBytes()) : "?",
                    readwrite ? disk.getTransferTime() : "?");
            List<HWPartition> partitions = disk.getPartitions();
            if (partitions == null) {
                // TODO Remove when all OS's implemented
                continue;
            }
            for (HWPartition part : partitions) {
                System.out.format(" |-- %s: %s (%s) Maj:Min=%d:%d, size: %s%s%n", part.getIdentification(),
                        part.getName(), part.getType(), part.getMajor(), part.getMinor(),
                        FormatUtil.formatBytesDecimal(part.getSize()),
                        part.getMountPoint().isEmpty() ? "" : " @ " + part.getMountPoint());
            }
        }
    }

    private static void printFileSystem(FileSystem fileSystem) {
        System.out.println("File System:");

        System.out.format(" File Descriptors: %d/%d%n", fileSystem.getOpenFileDescriptors(),
                fileSystem.getMaxFileDescriptors());

        List<OSFileStore> fsArray = fileSystem.getFileStores();
        for (OSFileStore fs : fsArray) {
            long usable = fs.getUsableSpace();
            long total = fs.getTotalSpace();
            System.out.format(
                    " %s (%s) [%s] %s of %s free (%.1f%%) is %s "
                            + (fs.getLogicalVolume() != null && fs.getLogicalVolume().length() > 0 ? "[%s]" : "%s")
                            + " and is mounted at %s%n",
                    fs.getName(), fs.getDescription().isEmpty() ? "file system" : fs.getDescription(), fs.getType(),
                    FormatUtil.formatBytes(usable), FormatUtil.formatBytes(fs.getTotalSpace()), 100d * usable / total,
                    fs.getVolume(), fs.getLogicalVolume(), fs.getMount());
        }
    }

    private static void printNetworkInterfaces(List<NetworkIF> list) {
        System.out.println("Network interfaces:");
        for (NetworkIF net : list) {
            System.out.format(" Name: %s (%s)%n", net.getName(), net.getDisplayName());
            System.out.format("   MAC Address: %s %n", net.getMacaddr());
            System.out.format("   MTU: %s, Speed: %s %n", net.getMTU(), FormatUtil.formatValue(net.getSpeed(), "bps"));
            System.out.format("   IPv4: %s %n", Arrays.toString(net.getIPv4addr()));
            System.out.format("   IPv6: %s %n", Arrays.toString(net.getIPv6addr()));
            boolean hasData = net.getBytesRecv() > 0 || net.getBytesSent() > 0 || net.getPacketsRecv() > 0
                    || net.getPacketsSent() > 0;
            System.out.format("   Traffic: received %s/%s%s; transmitted %s/%s%s %n",
                    hasData ? net.getPacketsRecv() + " packets" : "?",
                    hasData ? FormatUtil.formatBytes(net.getBytesRecv()) : "?",
                    hasData ? " (" + net.getInErrors() + " err)" : "",
                    hasData ? net.getPacketsSent() + " packets" : "?",
                    hasData ? FormatUtil.formatBytes(net.getBytesSent()) : "?",
                    hasData ? " (" + net.getOutErrors() + " err)" : "");
        }
    }

    private static void printNetworkParameters(NetworkParams networkParams) {
        System.out.println("Network parameters:");
        System.out.format(" Host name: %s%n", networkParams.getHostName());
        System.out.format(" Domain name: %s%n", networkParams.getDomainName());
        System.out.format(" DNS servers: %s%n", Arrays.toString(networkParams.getDnsServers()));
        System.out.format(" IPv4 Gateway: %s%n", networkParams.getIpv4DefaultGateway());
        System.out.format(" IPv6 Gateway: %s%n", networkParams.getIpv6DefaultGateway());
    }

    private static void printDisplays(List<Display> list) {
        System.out.println("Displays:");
        int i = 0;
        for (Display display : list) {
            System.out.println(" Display " + i + ":");
            System.out.println(display.toString());
            i++;
        }
    }

    private static void printUsbDevices(List<UsbDevice> list) {
        System.out.println("USB Devices:");
        for (UsbDevice usbDevice : list) {
            System.out.println(usbDevice.toString());
        }
    }
}