JAVA如何获取jvm和操作系统相关信息
作者：程序猿的代码
这篇文章主要介绍了JAVA获取jvm和操作系统相关信息,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，需要的朋友可以参考下
什么是JVM
JVM是JavaVirtualMachine（Java虚拟机）的缩写，JVM是一种用于计算设备的规范，它是一个虚构出来的计算机，是通过在实际的计算机上仿真模拟各种计算机功能来实现的。 主流虚拟机
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);
}
}到此这篇关于JAVA获取jvm和操作系统相关信息的文章就介绍到这了,更多相关JAVA获取jvm信息内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！