java读取计算机CPU、内存、硬盘等信息

╰半橙微兮° 2022-11-27 03:24 144阅读 0赞

参考文章：[Java获取系统内存、CPU、磁盘等信息][Java_CPU]

# pom.xml  #

<dependency>
      <groupId>com.github.oshi</groupId>
      <artifactId>oshi-core</artifactId>
      <version>3.12.2</version>
    </dependency>

# java代码： #

package org.fiend.utils.sysUtil;
    
    import com.sun.management.OperatingSystemMXBean;
    import oshi.SystemInfo;
    import oshi.hardware.CentralProcessor;
    
    import java.io.File;
    import java.lang.management.ManagementFactory;
    import java.lang.management.MemoryMXBean;
    import java.lang.management.MemoryUsage;
    import java.text.DecimalFormat;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.concurrent.Executors;
    import java.util.concurrent.TimeUnit;
    
    /**
     * @author langpf 2020-08-12 17:59:01
     */
    public class OSUtils {
        public static void main(String[] args) {
            System.out.println("");
            init();
        }
    
        public static void init() {
            Executors.newSingleThreadScheduledExecutor().scheduleAtFixedRate(() -> {
                try {
                    SystemInfo systemInfo = new SystemInfo();
    
                    OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
                    MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();
    
                    /* ============================== 操作系统信息 ============================= */
                    System.err.println("");
                    System.err.println("");
                    System.err.println("============================== 操作系统信息 =============================");
                    // 操作系统
                    String osName = System.getProperty("os.name");
    
                    // 获得线程总数
                    ThreadGroup parentThread;
                    parentThread = Thread.currentThread().getThreadGroup();
                    while (parentThread.getParent() != null) {
                        parentThread = parentThread.getParent();
                    }
    
                    int totalThread = parentThread.activeCount();
    
                    System.err.println("操作系统: " + osName);
                    System.err.println("程序启动时间: " + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
                            .format(new Date(ManagementFactory.getRuntimeMXBean().getStartTime())));
                    System.err.println("pid: " + System.getProperty("PID"));
                    System.err.println("总线程数: " + totalThread);
    
                    // 磁盘使用情况
                    File[] files = File.listRoots();
                    for (File file : files) {
                        String total = new DecimalFormat("#.#").format(file.getTotalSpace() * 1.0 / 1024 / 1024 / 1024) + "G";
                        String free = new DecimalFormat("#.#").format(file.getFreeSpace() * 1.0 / 1024 / 1024 / 1024) + "G";
                        String un = new DecimalFormat("#.#").format(file.getUsableSpace() * 1.0 / 1024 / 1024 / 1024) + "G";
                        String path = file.getPath();
                        System.err.println(path + "总: " + total + ",可用空间: " + un + ",空闲空间: " + free);
                        // System.err.println("=============================================");
                        System.err.println("---------------------------------------------");
                    }
    
                    /* ============================== 堆内存信息 ============================= */
                    System.err.println("");
                    System.err.println("");
                    System.err.println("============================== 堆内存信息 =============================");
                    // 椎内存使用情况
                    MemoryUsage memoryUsage = memoryMXBean.getHeapMemoryUsage();
    
                    // 初始的总内存(B)
                    long initTotalMemorySize = memoryUsage.getInit();
    
                    // 最大可用内存(B)
                    long maxMemorySize = memoryUsage.getMax();
    
                    // 已使用的内存(B)
                    long usedMemorySize = memoryUsage.getUsed();
    
                    System.err.println(
                            "初始的总内存(JVM): " + new DecimalFormat("#.#").format(initTotalMemorySize * 1.0 / 1024 / 1024) + "M");
                    System.err.println(
                            "最大可用内存(JVM): " + new DecimalFormat("#.#").format(maxMemorySize * 1.0 / 1024 / 1024) + "M");
                    System.err.println(
                            "已使用的内存(JVM): " + new DecimalFormat("#.#").format(usedMemorySize * 1.0 / 1024 / 1024) + "M");
    
                    /* ============================== 物理内存信息 ============================= */
                    System.err.println("");
                    System.err.println("");
                    System.err.println("============================== 物理内存信息 =============================");
                    // 总的物理内存(B)
                    long totalMemorySizeByte = osmxb.getTotalPhysicalMemorySize();
                    long totalMemorySizeByte2 = systemInfo.getHardware().getMemory().getTotal();
    
                    // 总的物理内存
                    String totalMemorySize =
                            new DecimalFormat("#.##").format(totalMemorySizeByte / 1024.0 / 1024 / 1024) + "G";
                    String totalMemorySize2 =
                            new DecimalFormat("#.##").format(totalMemorySizeByte2 / 1024.0 / 1024 / 1024) + "G";
    
                    // 剩余的物理内存(B)
                    long freePhysicalMemorySizeByte = osmxb.getFreePhysicalMemorySize();
                    long freePhysicalMemorySizeByte2 = systemInfo.getHardware().getMemory().getAvailable();
    
                    // 剩余的物理内存
                    String freePhysicalMemorySize =
                            new DecimalFormat("#.##").format(freePhysicalMemorySizeByte / 1024.0 / 1024 / 1024) + "G";
                    String freePhysicalMemorySize2 =
                            new DecimalFormat("#.##").format(freePhysicalMemorySizeByte2 * 1.0 / 1024 / 1024 / 1024) + "G";
    
                    // 已使用的物理内存
                    String usedMemory =
                            new DecimalFormat("#.##").format((totalMemorySizeByte - freePhysicalMemorySizeByte) / 1024.0 / 1024 / 1024) + "G";
                    String usedMemory2 =
                            new DecimalFormat("#.##").format((totalMemorySizeByte2 - freePhysicalMemorySizeByte2) * 1.0 / 1024 / 1024 / 1024) + "G";
    
                    String memoryUsedRate = new DecimalFormat("#.##%").format(1 - (freePhysicalMemorySizeByte * 1.0 / totalMemorySizeByte));
    
                    System.err.println("总的物理内存: " + totalMemorySize);
                    System.err.println("总的物理内存: " + totalMemorySize2);
                    System.err.println("剩余的物理内存: " + freePhysicalMemorySize);
                    System.err.println("剩余的物理内存: " + freePhysicalMemorySize2);
                    System.err.println("已使用的物理内存: " + usedMemory);
                    System.err.println("已使用的物理内存: " + usedMemory2);
                    System.err.println("物理内存使用率: " + memoryUsedRate);
    
                    /* ============================== JVM信息 ============================= */
                    System.err.println("");
                    System.err.println("");
                    System.err.println("============================== JVM信息 =============================");
                    System.err.println("JAVA_HOME: " + System.getProperty("java.home"));
                    System.err.println("JAVA_VERSION: " + System.getProperty("java.version"));
                    System.err.println("USER_HOME: " + System.getProperty("user.home"));
                    System.err.println("USER_NAME: " + System.getProperty("user.name"));
    
                    /* ============================== CPU信息 ============================= */
                    System.err.println("");
                    System.err.println("");
                    System.err.println("============================== CPU信息 =============================");
                    printlnCpuInfo(systemInfo);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }, 0, 5, TimeUnit.SECONDS);
        }
    
        /**
         * 打印 CPU 信息
         * @param systemInfo s
         */
        private static void printlnCpuInfo(SystemInfo systemInfo) throws InterruptedException {
            CentralProcessor processor = systemInfo.getHardware().getProcessor();
            long[] prevTicks = processor.getSystemCpuLoadTicks();
            // 睡眠1s
            TimeUnit.SECONDS.sleep(1);
            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;
    
            System.err.println("cpu核数: " + Runtime.getRuntime().availableProcessors());
            System.err.println("cpu核数: " + processor.getLogicalProcessorCount());
            System.err.println("cpu系统使用率: " + new DecimalFormat("#.##%").format(cSys * 1.0 / totalCpu));
            System.err.println("cpu用户使用率: " + new DecimalFormat("#.##%").format(user * 1.0 / totalCpu));
            System.err.println("cpu当前等待率: " + new DecimalFormat("#.##%").format(iowait * 1.0 / totalCpu));
            System.err.println("cpu当前空闲率: " + new DecimalFormat("#.##%").format(idle * 1.0 / totalCpu));
            System.err.format("CPU load: %.1f%% (counting ticks)%n", processor.getSystemCpuLoadBetweenTicks() * 100);
            System.err.format("CPU load: %.1f%% (OS MXBean)%n", processor.getSystemCpuLoad() * 100);
        }
    }

[Java_CPU]: https://www.cnblogs.com/rvs-2016/p/11169894.html