java读取系统cpu，内存，硬盘信息

window的cmd，该命令会实时显示 CPU 使用率

typeperf "\Processor(_Total)\% Processor Time"

pom.xml依赖

        <dependency>
            <groupId>com.github.oshi</groupId>
            <artifactId>oshi-core</artifactId>
            <version>6.2.2</version>
        </dependency>

java代码实现

    public static void main(String[] args) {
    
        SpringApplication.run(Iec104Application.class, args);
        
        SystemInfo systemInfo = new SystemInfo();
        
        HardwareAbstractionLayer hardware = systemInfo.getHardware();
        
        System.out.println(hardware.getComputerSystem());
        
        CentralProcessor processor = hardware.getProcessor();
        
        GlobalMemory memory = hardware.getMemory();
        
        FileSystem fileSystem = systemInfo.getOperatingSystem().getFileSystem();

        long[] prevTicks = processor.getSystemCpuLoadTicks();
        // 计算CPU负载百分比
        //一定要睡眠一下，不然cpu获取是平均的，不然可能是0
        Util.sleep(1000);
        double load = processor.getSystemCpuLoadBetweenTicks(prevTicks) * 100;
        System.out.println("CPU Load: " + String.format("%.1f", load) + "%");

        // 创建 DecimalFormat 对象，保留 1 位小数
        DecimalFormat df = new DecimalFormat("#.0");

        // 内存使用情况
        long totalMemory = memory.getTotal(); // 获取总内存
        double totalMemoryInGB = totalMemory / (1024.0 * 1024.0 * 1024.0); // 转换为 GB
        System.out.println("system.memory.total: " + df.format(totalMemoryInGB) + " GB");

        long usedMemory = totalMemory - memory.getAvailable(); // 已用内存
        double usedMemoryInGB = usedMemory / (1024.0 * 1024.0 * 1024.0); // 转换为 GB
        System.out.println("system.memory.used: " + df.format(usedMemoryInGB) + " GB");

        // 硬盘使用情况（总空间和已用空间）
        long totalDiskSpace = fileSystem.getFileStores().stream()
                .mapToLong(fs -> fs.getTotalSpace())
                .sum(); // 获取硬盘总空间
        double totalDiskSpaceInGB = totalDiskSpace / (1024.0 * 1024.0 * 1024.0); // 转换为 GB
        System.out.println("system.disk.total: " + df.format(totalDiskSpaceInGB) + " GB");
		
		// 获取已用硬盘空间，可以读取每一个盘符
        long usedDiskSpace = fileSystem.getFileStores().stream()
                .mapToLong(fs -> fs.getUsableSpace())
                .sum(); 
        double usedDiskSpaceInGB = usedDiskSpace / (1024.0 * 1024.0 * 1024.0); // 转换为 GB
        System.out.println("system.disk.used: " + df.format(usedDiskSpaceInGB) + " GB");
    }