Java 实现查看cpu信息、服务器信息、操作系统信息、jvm 信息

文章目录

Java想要实现跨平台查看服务器信息，可以使用 OSHI 开源 jar 包实现

引入依赖

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

获取 cpu 信息

	/**
     * 获取 cpu 信息
     */
    private static void getCpuInfo() {
        System.err.println("===============cpu信息begin===============");
        SystemInfo systemInfo = new SystemInfo();
        CentralProcessor processor = systemInfo.getHardware().getProcessor();
        long[] prevTicks = processor.getSystemCpuLoadTicks();
        try {
            // 睡眠 1s
            TimeUnit.SECONDS.sleep(1);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        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.out.println("cpu核数:" + processor.getLogicalProcessorCount());
        System.out.println("cpu系统使用率:" + new DecimalFormat("#.##%").format(cSys * 1.0 / totalCpu));
        System.out.println("cpu用户使用率:" + new DecimalFormat("#.##%").format(user * 1.0 / totalCpu));
        System.out.println("cpu当前等待率:" + new DecimalFormat("#.##%").format(iowait * 1.0 / totalCpu));
        System.out.println("cpu当前使用率:" + new DecimalFormat("#.##%").format(1.0 - (idle * 1.0 / totalCpu)));
        System.err.println("===============cpu信息end===============\n");
    }

获取服务器信息

	/**
     * 获取主机内存信息
     */
    private static void getMemoryInfo() {
        System.err.println("===============主机内存信息begin===============");
        SystemInfo systemInfo = new SystemInfo();
        GlobalMemory memory = systemInfo.getHardware().getMemory();
        long totalMemory = memory.getTotal(); // 总内存
        long acaliableMemory = memory.getAvailable(); // 剩余内存
        System.out.println("总内存:" + formatByte(totalMemory));
        System.out.println("已经使用的内存:" + formatByte(totalMemory - acaliableMemory));
        System.out.println("剩余内存:" + formatByte(acaliableMemory));
        System.out.println("使用率:" + new DecimalFormat("#.##%").format((totalMemory - acaliableMemory) * 1.0 / totalMemory));
        System.err.println("===============主机内存信息end===============\n");
    }

formatByte 换算单位工具类

	/**
     * 换算单位
     *
     * @param byteNumber 换算的数字
     */
    private static String formatByte(long byteNumber) {
        double format = 1024.0;
        double kbNumber = byteNumber / format;
        if (kbNumber < format)
            return new DecimalFormat("#.##KB").format(kbNumber);
        double mbNumber = kbNumber / format;
        if (mbNumber < format)
            return new DecimalFormat("#.##MB").format(mbNumber);
        double gbNumber = mbNumber / format;
        if (gbNumber < format)
            return new DecimalFormat("#.##GB").format(gbNumber);
        double tbNumber = gbNumber / format;
        return new DecimalFormat("#.##TB").format(tbNumber);
    }

获取操作系统信息

	/**
     * 获取操作系统信息
     */
    private static void getSystemInfo() {
        System.err.println("===============操作系统信息begin==============");
        String osName = System.getProperty("os.name"); // 系统名称
        String osArch = System.getProperty("os.arch"); // 架构名称
        System.out.println("操作系统名称:" + osName);
        System.out.println("系统架构:" + osArch);
        System.err.println("===============操作系统信息end==============\n");
    }

获取 JVM 信息

 	/**
     * 获取 Jvm 信息
     */
    private static void getJvmInfo() {
        System.err.println("===============Jvm信息begin===============");
        Runtime runtime = Runtime.getRuntime();
        long jvmTotalMemoryByte = runtime.totalMemory(); // jvm总内存
        long jvmMaxMemoryByte = runtime.maxMemory(); // jvm 最大内存
        long freeMemoryByte = runtime.freeMemory(); // jvm 空闲空间
        String jdkVersion = System.getProperty("java.version");  // jdk 版本
        String jdkHome = System.getProperty("java.home");    // jdk 安装路径
        System.out.println("jvm总内存:" + formatByte(jvmTotalMemoryByte));
        System.out.println("jvm已使用内存:" + formatByte(jvmTotalMemoryByte - freeMemoryByte));
        System.out.println("jvm最大内存:" + formatByte(jvmMaxMemoryByte));
        System.out.println("jvm剩余内存:" + formatByte(freeMemoryByte));
        System.out.println("jvm内存使用率:" + new DecimalFormat("#.##%").format((jvmTotalMemoryByte - freeMemoryByte) * 1.0 / jvmTotalMemoryByte));
        System.out.println("jdk版本号:" + jdkVersion);
        System.out.println("jdk安装路径:" + jdkHome);
        System.err.println("===============Jvm信息end===============");
    }

测试结果