JAVA获取jvm和操作系统相关信息

JAVA获取jvm和操作系统相关信息背景

今日搬砖?时需要获取系统运行时间、版本号等相关信息，使用Java自带的类进行获取系统运行的相关信息，在这整理记录分享一下，感兴趣的小伙伴可以自己尝试尝试。

Jvm

首先获取jvm相关信息，包含jvm的名称、版本号、启动时间、运行时间、环境变量、进程id等等

public class Test {    public static void main(String[] args) {        RuntimeMXBean runtimeMXBean = ManagementFactory.getRuntimeMXBean();        // jvmName        System.out.printf("jvmName: %s %n", runtimeMXBean.getVmName());        // jvmVersion        System.out.printf("jvmVersion: %s %n", runtimeMXBean.getVmVersion());        // jvmVendor        System.out.printf("jvmVendor: %s %n", runtimeMXBean.getVmVendor());        // startTime 使用hutool中DateUtil进行转换        long startTime = runtimeMXBean.getStartTime();        System.out.printf("startTime: %s %n", DateUtil.date(startTime).toString());        // updateTime        long uptime = runtimeMXBean.getUptime();        System.out.printf("updateTime: %s %n", DateUtil.formatBetween(uptime, BetweenFormater.Level.SECOND));        // classPath        System.out.printf("classPath: %s %n", runtimeMXBean.getClassPath());        // systemProperties        System.out.printf("jvmName: %s %n", runtimeMXBean.getSystemProperties());        // bootClassPath        System.out.printf("bootClassPath: %s %n", runtimeMXBean.getBootClassPath());        // processId        System.out.printf("processId: %s %n", runtimeMXBean.getName().split("@")[0]);    }}

还可以获取JVM内存相关信息，例如堆内存。

public class Test {    public static void main(String[] args) {        MemoryMXBean memoryMXBean = ManagementFactory.getMemoryMXBean();        MemoryUsage heapMemoryUsage = memoryMXBean.getHeapMemoryUsage();        // heapMemoryUsed        System.out.printf("heapMemoryUsed: %d MB %n", heapMemoryUsage.getUsed()/1024/1024);        // heapMemoryMax        System.out.printf("heapMemoryMax: %d MB %n", heapMemoryUsage.getMax()/1024/1024);        // heapMemoryCommitted        System.out.printf("heapMemoryCommitted: %d MB %n", heapMemoryUsage.getCommitted()/1024/1024);        MemoryUsage nonHeapMemoryUsage = memoryMXBean.getNonHeapMemoryUsage();        // nonHeapMemoryUsed        System.out.printf("nonHeapMemoryUsed: %d MB %n", nonHeapMemoryUsage.getUsed()/1024/1024);        // nonHeapMemoryMax        System.out.printf("nonHeapMemoryMax: %d MB %n", nonHeapMemoryUsage.getMax()/1024/1024);        // nonHeapMemoryCommitted        System.out.printf("nonHeapMemoryCommitted: %d MB %n", nonHeapMemoryUsage.getCommitted()/1024/1024);    }}

获取JDK相关信息。包含jdk的版本、安装路径、当前运行jar包路径、运行jar文件名等。

public class Test {    public static void main(String[] args) {        // jdkVersion        System.out.printf("jdkVersion: %s %n", System.getProperty("java.version"));        // java_home        System.out.printf("java_home: %s %n", System.getProperty("java.home"));        // jar包路径        String path = System.getProperty("java.class.path");        int firstIndex = path.lastIndexOf(System.getProperty("path.separator")) + 1;        int lastIndex = path.lastIndexOf(File.separator) + 1;        String jarPath = path.substring(firstIndex, lastIndex);        System.out.printf("jarPath: %s %n", jarPath);        // 当前运行jar文件名        String jarName = path.substring(lastIndex);        System.out.printf("jarName: %s %n", jarName);    }}

获取java虚拟机线程信息，包含线程的阻塞时间、次数、线程的堆栈信息等等。

public class Test {    public static void main(String[] args) {        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();        // ThreadCount        System.out.printf("ThreadCount: %d %n", threadMXBean.getThreadCount());        // AllThreadIds        System.out.printf("AllThreadIds: %s %n", threadMXBean.getAllThreadIds());        // TotalStartedThread        System.out.printf("TotalStartedThread: %d %n", threadMXBean.getTotalStartedThreadCount());        // DaemonThread        System.out.printf("DaemonThread: %d %n", threadMXBean.getDaemonThreadCount());        // PeakThread        System.out.printf("PeakThread: %d %n", threadMXBean.getPeakThreadCount());        // ThreadInfo        System.out.printf("ThreadInfo: %s %n", threadMXBean.getThreadInfo(threadMXBean.getAllThreadIds()));    }}

获取java虚拟机类加载相关信息。

public class Test {    public static void main(String[] args) {        ClassLoadingMXBean classLoadingMXBean = ManagementFactory.getClassLoadingMXBean();        // LoadedClassCount        System.out.printf("LoadedClassCount: %d %n", classLoadingMXBean.getLoadedClassCount());        // TotalLoadedClassCount        System.out.printf("TotalLoadedClassCount: %d %n", classLoadingMXBean.getTotalLoadedClassCount());        // UnloadedClassCount        System.out.printf("UnloadedClassCount: %d %n", classLoadingMXBean.getUnloadedClassCount());    }}

操作系统

获取操作系统以及主机硬件信息，包含系统名称、版本、物理内存、可用内存等等。

public class Test {    public static void main(String[] args) {        // 系统版本        OperatingSystemMXBean operatingSystemMXBean = (OperatingSystemMXBean) ManagementFactoryHelper.getOperatingSystemMXBean();        // osName        System.out.printf("osName: %s %n", operatingSystemMXBean.getName());        // Arch        System.out.printf("Arch: %s %n", operatingSystemMXBean.getArch());        // Version        System.out.printf("Version: %s %n", operatingSystemMXBean.getVersion());        // 物理内存        long totalPhysicalMemorySize = operatingSystemMXBean.getTotalPhysicalMemorySize()/1024/1024/1024;        // totalPhysicalMemorySize        System.out.printf("totalPhysicalMemorySize: %d GB %n", totalPhysicalMemorySize);    }}

原文链接:https://monkey.blog.xpyvip.top/archives/java-huo-qu-jvm-he-cao-zuo-xi-tong-xiang-guan-xin-xi