java 利用ManagementFactory获取jvm,os的一些信息--转

原文地址：http://blog.csdn.net/dream_broken/article/details/49759043

想了解下某个Java项目的运行时jvm的情况，可以使用一些监控工具，比如jdk的bin下就提供了很多工具。

   

比如，本地运行一个程序，让它死循环

while(true){
            try {
                Thread.sleep(10*1000);
            } catch (Exception e) {

            }
        }

    然后，点击启动jconsole.exe

可以发现，jconsole.exe可以连接本地，也可以连接远程，我们选择本地的中的刚刚上面执行的那个类

我们发现，居然可以监控到这么多信息，那如果我们自己写代码，能否获取到这些信息呢，点击MBean。

java.lang下，看名称就知道是什么了，再点击某一个，会看到一些类信息，也就是说，我们是有可能自己写代码也能获取到jvm信息的。

    下面就记录下例子代码。

package com.fei;

import java.lang.management.ClassLoadingMXBean;
import java.lang.management.CompilationMXBean;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryManagerMXBean;
import java.lang.management.MemoryPoolMXBean;
import java.lang.management.MemoryUsage;
import java.lang.management.OperatingSystemMXBean;
import java.lang.management.RuntimeMXBean;
import java.lang.management.ThreadInfo;
import java.lang.management.ThreadMXBean;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.List;

public class JvmInfo {

    static final long MB = 1024 * 1024;

    public static void main(String[] args) {


        //打印系统信息
        System.out.println("===========打印系统信息==========");
        printOperatingSystemInfo();
        //打印编译信息
        System.out.println("===========打印编译信息==========");
        printCompilationInfo();
        //打印类加载信息
        System.out.println("===========打印类加载信息==========");
        printClassLoadingInfo();
        //打印运行时信息
        System.out.println("===========打印运行时信息==========");
        printRuntimeInfo();
        //打印内存管理器信息
        System.out.println("===========打印内存管理器信息==========");
        printMemoryManagerInfo();
        //打印垃圾回收信息
        System.out.println("===========打印垃圾回收信息==========");
        printGarbageCollectorInfo();
        //打印vm内存
        System.out.println("===========打印vm内存信息==========");
        printMemoryInfo();
        //打印vm各内存区信息
        System.out.println("===========打印vm各内存区信息==========");
        printMemoryPoolInfo();
        //打印线程信息
        System.out.println("===========打印线程==========");
        printThreadInfo();

    }


    private static void printOperatingSystemInfo(){
        OperatingSystemMXBean system = ManagementFactory.getOperatingSystemMXBean();
        //相当于System.getProperty("os.name").
        System.out.println("系统名称:"+system.getName());
        //相当于System.getProperty("os.version").
        System.out.println("系统版本:"+system.getVersion());
        //相当于System.getProperty("os.arch").
        System.out.println("操作系统的架构:"+system.getArch());
        //相当于 Runtime.availableProcessors()
        System.out.println("可用的内核数:"+system.getAvailableProcessors());

        if(isSunOsMBean(system)){
            long totalPhysicalMemory = getLongFromOperatingSystem(system,"getTotalPhysicalMemorySize");
            long freePhysicalMemory = getLongFromOperatingSystem(system, "getFreePhysicalMemorySize");
            long usedPhysicalMemorySize =totalPhysicalMemory - freePhysicalMemory;

            System.out.println("总物理内存(M):"+totalPhysicalMemory/MB);
            System.out.println("已用物理内存(M):"+usedPhysicalMemorySize/MB);
            System.out.println("剩余物理内存(M):"+freePhysicalMemory/MB);

            long  totalSwapSpaceSize = getLongFromOperatingSystem(system, "getTotalSwapSpaceSize");
            long freeSwapSpaceSize = getLongFromOperatingSystem(system, "getFreeSwapSpaceSize");
            long usedSwapSpaceSize = totalSwapSpaceSize - freeSwapSpaceSize;

            System.out.println("总交换空间(M):"+totalSwapSpaceSize/MB);
            System.out.println("已用交换空间(M):"+usedSwapSpaceSize/MB);
            System.out.println("剩余交换空间(M):"+freeSwapSpaceSize/MB);
        }
    }

    private static long getLongFromOperatingSystem(OperatingSystemMXBean operatingSystem, String methodName) {
        try {
            final Method method = operatingSystem.getClass().getMethod(methodName,
                    (Class<?>[]) null);
            method.setAccessible(true);
            return (Long) method.invoke(operatingSystem, (Object[]) null);
        } catch (final InvocationTargetException e) {
            if (e.getCause() instanceof Error) {
                throw (Error) e.getCause();
            } else if (e.getCause() instanceof RuntimeException) {
                throw (RuntimeException) e.getCause();
            }
            throw new IllegalStateException(e.getCause());
        } catch (final NoSuchMethodException e) {
            throw new IllegalArgumentException(e);
        } catch (final IllegalAccessException e) {
            throw new IllegalStateException(e);
        }
    }

    private static void printCompilationInfo(){
        CompilationMXBean compilation = ManagementFactory.getCompilationMXBean();
        System.out.println("JIT编译器名称："+compilation.getName());
        //判断jvm是否支持编译时间的监控
        if(compilation.isCompilationTimeMonitoringSupported()){
            System.out.println("总编译时间："+compilation.getTotalCompilationTime()+"秒");
        }
    }

    private static void printClassLoadingInfo(){
        ClassLoadingMXBean classLoad= ManagementFactory.getClassLoadingMXBean();
        System.out.println("已加载类总数："+classLoad.getTotalLoadedClassCount());
        System.out.println("已加载当前类："+classLoad.getLoadedClassCount());
        System.out.println("已卸载类总数："+classLoad.getUnloadedClassCount());

    }

    private static void printRuntimeInfo(){
        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        System.out.println("进程PID="+runtime.getName().split("@")[0]);
        System.out.println("jvm规范名称:"+runtime.getSpecName());
        System.out.println("jvm规范运营商:"+runtime.getSpecVendor());
        System.out.println("jvm规范版本:"+runtime.getSpecVersion());
        //返回虚拟机在毫秒内的开始时间。该方法返回了虚拟机启动时的近似时间
        System.out.println("jvm启动时间（毫秒）:"+runtime.getStartTime());
        //相当于System.getProperties
        System.out.println("获取System.properties:"+runtime.getSystemProperties());
        System.out.println("jvm正常运行时间（毫秒）:"+runtime.getUptime());
        //相当于System.getProperty("java.vm.name").
        System.out.println("jvm名称:"+runtime.getVmName());
        //相当于System.getProperty("java.vm.vendor").
        System.out.println("jvm运营商:"+runtime.getVmVendor());
        //相当于System.getProperty("java.vm.version").
        System.out.println("jvm实现版本:"+runtime.getVmVersion());
        List<String> args = runtime.getInputArguments();
        if(args != null && !args.isEmpty()){
            System.out.println("vm参数:");
            for(String arg : args){
                System.out.println(arg);
            }
        }
        System.out.println("类路径:"+runtime.getClassPath());
        System.out.println("引导类路径:"+runtime.getBootClassPath());
        System.out.println("库路径:"+runtime.getLibraryPath());
    }

    private static void printMemoryManagerInfo(){
        List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans();
        if(managers != null && !managers.isEmpty()){
            for(MemoryManagerMXBean manager : managers){
                System.out.println("vm内存管理器：名称="+manager.getName()+",管理的内存区="
            +Arrays.deepToString(manager.getMemoryPoolNames())+",ObjectName="+manager.getObjectName());
            }
        }
    }

    private static void printGarbageCollectorInfo(){
        List<GarbageCollectorMXBean> garbages = ManagementFactory.getGarbageCollectorMXBeans();
        for(GarbageCollectorMXBean garbage : garbages){
            System.out.println("垃圾收集器：名称="+garbage.getName()+",收集="+garbage.getCollectionCount()+",总花费时间="
        +garbage.getCollectionTime()+",内存区名称="+Arrays.deepToString(garbage.getMemoryPoolNames()));
        }
    }

    private static void printMemoryInfo(){
        MemoryMXBean memory = ManagementFactory.getMemoryMXBean();
        MemoryUsage headMemory = memory.getHeapMemoryUsage();
        System.out.println("head堆:");
        System.out.println("	初始(M):"+headMemory.getInit()/MB);
        System.out.println("	最大(上限)(M):"+headMemory.getMax()/MB);
        System.out.println("	当前(已使用)(M):"+headMemory.getUsed()/MB);
        System.out.println("	提交的内存(已申请)(M):"+headMemory.getCommitted()/MB);
        System.out.println("	使用率:"+headMemory.getUsed()*100/headMemory.getCommitted()+"%");

        System.out.println("non-head非堆:");
        MemoryUsage nonheadMemory = memory.getNonHeapMemoryUsage();
        System.out.println("	初始(M):"+nonheadMemory.getInit()/MB);
        System.out.println("	最大(上限)(M):"+nonheadMemory.getMax()/MB);
        System.out.println("	当前(已使用)(M):"+nonheadMemory.getUsed()/MB);
        System.out.println("	提交的内存(已申请)(M):"+nonheadMemory.getCommitted()/MB);
        System.out.println("	使用率:"+nonheadMemory.getUsed()*100/nonheadMemory.getCommitted()+"%");
    }

    private static void printMemoryPoolInfo(){
        List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
        if(pools != null && !pools.isEmpty()){
            for(MemoryPoolMXBean pool : pools){
                //只打印一些各个内存区都有的属性，一些区的特殊属性，可看文档或百度
                //最大值，初始值，如果没有定义的话，返回-1，所以真正使用时，要注意
                System.out.println("vm内存区:
	名称="+pool.getName()+"
	所属内存管理者="+Arrays.deepToString(pool.getMemoryManagerNames())
                        +"
	 ObjectName="+pool.getObjectName()+"
	初始大小(M)="+pool.getUsage().getInit()/MB
                        +"
	最大(上限)(M)="+pool.getUsage().getMax()/MB
                        +"
	已用大小(M)="+pool.getUsage().getUsed()/MB
                        +"
	已提交(已申请)(M)="+pool.getUsage().getCommitted()/MB
                        +"
	使用率="+(pool.getUsage().getUsed()*100/pool.getUsage().getCommitted())+"%");

            }
        }
    }

    private static void printThreadInfo(){
        ThreadMXBean thread = ManagementFactory.getThreadMXBean();
        System.out.println("ObjectName="+thread.getObjectName());
        System.out.println("仍活动的线程总数="+thread.getThreadCount());
        System.out.println("峰值="+thread.getPeakThreadCount());
        System.out.println("线程总数（被创建并执行过的线程总数）="+thread.getTotalStartedThreadCount());
        System.out.println("当初仍活动的守护线程（daemonThread）总数="+thread.getDaemonThreadCount());

        //检查是否有死锁的线程存在
        long[] deadlockedIds =  thread.findDeadlockedThreads();
        if(deadlockedIds != null && deadlockedIds.length > 0){
            ThreadInfo[] deadlockInfos = thread.getThreadInfo(deadlockedIds);
            System.out.println("死锁线程信息:");
            System.out.println("		线程名称		状态		");
            for(ThreadInfo deadlockInfo : deadlockInfos){
                System.out.println("		"+deadlockInfo.getThreadName()+"		"+deadlockInfo.getThreadState()
                        +"		"+deadlockInfo.getBlockedTime()+"		"+deadlockInfo.getWaitedTime()
                        +"		"+deadlockInfo.getStackTrace().toString());
            }
        }
        long[] threadIds = thread.getAllThreadIds();
        if(threadIds != null && threadIds.length > 0){
            ThreadInfo[] threadInfos = thread.getThreadInfo(threadIds);
            System.out.println("所有线程信息:");
            System.out.println("		线程名称					状态					线程id");
            for(ThreadInfo threadInfo : threadInfos){
                System.out.println("		"+threadInfo.getThreadName()+"					"+threadInfo.getThreadState()
                        +"					"+threadInfo.getThreadId());
            }
        }

    }

    private static boolean isSunOsMBean(OperatingSystemMXBean operatingSystem) {
        final String className = operatingSystem.getClass().getName();
        return "com.sun.management.OperatingSystem".equals(className)
                || "com.sun.management.UnixOperatingSystem".equals(className);
    }
}

===========打印系统信息==========
系统名称:Windows 7
系统版本:6.1
操作系统的架构:amd64
可用的内核数:4
总物理内存(M):6041
已用物理内存(M):5387
剩余物理内存(M):653
总交换空间(M):18136
已用交换空间(M):15817
剩余交换空间(M):2319
===========打印编译信息==========
JIT编译器名称：HotSpot 64-Bit Tiered Compilers
总编译时间：0秒
===========打印类加载信息==========
已加载类总数：410
已加载当前类：410
已卸载类总数：0
===========打印运行时信息==========
进程PID=386220
jvm规范名称:Java Virtual Machine Specification
jvm规范运营商:Oracle Corporation
jvm规范版本:1.7
jvm启动时间（毫秒）:1447134405258
获取System.properties:{java.vm.version=24.80-b11, sun.jnu.encoding=GBK, java.vendor.url=http://java.oracle.com/, java.vm.info=mixed mode, user.dir=E:	est2	est200, sun.cpu.isalist=amd64, java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment, sun.os.patch.level=Service Pack 1, java.io.tmpdir=C:UsersWEIJIA~1AppDataLocalTemp\, user.home=E:USERweijianfei, java.awt.printerjob=sun.awt.windows.WPrinterJob, java.version=1.7.0_80, file.encoding.pkg=sun.io, java.vendor.url.bug=http://bugreport.sun.com/bugreport/, file.encoding=UTF-8, line.separator=
, sun.java.command=com.fei.JvmInfo, java.vm.specification.vendor=Oracle Corporation, java.vm.vendor=Oracle Corporation, java.class.path=E:	est2	est200	argetclasses;E:setupmavenorgapachezookeeperzookeeper3.4.6zookeeper-3.4.6.jar;E:setupmavenorgslf4jslf4j-api1.6.1slf4j-api-1.6.1.jar;E:setupmavenorgslf4jslf4j-log4j121.6.1slf4j-log4j12-1.6.1.jar;E:setupmavenlog4jlog4j1.2.16log4j-1.2.16.jar;E:setupmavenjlinejline.9.94jline-0.9.94.jar;E:setupmavenjunitjunit3.8.1junit-3.8.1.jar;E:setupmavenio
etty
etty3.7.0.Final
etty-3.7.0.Final.jar;E:setupmavenorgspringframeworkspring-webmvc4.2.1.RELEASEspring-webmvc-4.2.1.RELEASE.jar;E:setupmavenorgspringframeworkspring-beans4.2.1.RELEASEspring-beans-4.2.1.RELEASE.jar;E:setupmavenorgspringframeworkspring-context4.2.1.RELEASEspring-context-4.2.1.RELEASE.jar;E:setupmavenorgspringframeworkspring-aop4.2.1.RELEASEspring-aop-4.2.1.RELEASE.jar;E:setupmavenaopallianceaopalliance1.0aopalliance-1.0.jar;E:setupmavenorgspringframeworkspring-core4.2.1.RELEASEspring-core-4.2.1.RELEASE.jar;E:setupmavencommons-loggingcommons-logging1.2commons-logging-1.2.jar;E:setupmavenorgspringframeworkspring-expression4.2.1.RELEASEspring-expression-4.2.1.RELEASE.jar;E:setupmavenorgspringframeworkspring-web4.2.1.RELEASEspring-web-4.2.1.RELEASE.jar, sun.io.unicode.encoding=UnicodeLittle, user.variant=, os.arch=amd64, user.name=weijianfei, user.language=zh, java.runtime.version=1.7.0_80-b15, sun.boot.class.path=D:jre1.7lib
esources.jar;D:jre1.7lib
t.jar;D:jre1.7libsunrsasign.jar;D:jre1.7libjsse.jar;D:jre1.7libjce.jar;D:jre1.7libcharsets.jar;D:jre1.7libjfr.jar;D:jre1.7classes, sun.desktop=windows, sun.cpu.endian=little, awt.toolkit=sun.awt.windows.WToolkit, sun.boot.library.path=D:jre1.7in, java.vm.name=Java HotSpot(TM) 64-Bit Server VM, java.home=D:jre1.7, java.endorsed.dirs=D:jre1.7libendorsed, sun.management.compiler=HotSpot 64-Bit Tiered Compilers, java.runtime.name=Java(TM) SE Runtime Environment, java.library.path=D:jre1.7in;C:WindowsSunJavain;C:Windowssystem32;C:Windows;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;C:Program FilesJavajdk1.6.0_45in;C:Program FilesJavajdk1.6.0_45jrein;D:softsvn1.8in;D:apache-maven-3.2.3in;D:mysql5.7MySQL Server 5.7in;D:mysql5.7MySQL Utilities 1.3.5;D:mongoDB;., file.separator=\, java.specification.vendor=Oracle Corporation, java.vm.specification.version=1.7, sun.java.launcher=SUN_STANDARD, user.timezone=, os.name=Windows 7, path.separator=;, java.ext.dirs=D:jre1.7libext;C:WindowsSunJavalibext, sun.arch.data.model=64, java.specification.name=Java Platform API Specification, os.version=6.1, user.script=, user.country=CN, java.class.version=51.0, java.vendor=Oracle Corporation, java.vm.specification.name=Java Virtual Machine Specification, java.specification.version=1.7}
jvm正常运行时间（毫秒）:573
jvm名称:Java HotSpot(TM) 64-Bit Server VM
jvm运营商:Oracle Corporation
jvm实现版本:24.80-b11
vm参数:
-Dfile.encoding=UTF-8
类路径:E:	est2	est200	argetclasses;E:setupmavenorgapachezookeeperzookeeper3.4.6zookeeper-3.4.6.jar;E:setupmavenorgslf4jslf4j-api1.6.1slf4j-api-1.6.1.jar;E:setupmavenorgslf4jslf4j-log4j121.6.1slf4j-log4j12-1.6.1.jar;E:setupmavenlog4jlog4j1.2.16log4j-1.2.16.jar;E:setupmavenjlinejline.9.94jline-0.9.94.jar;E:setupmavenjunitjunit3.8.1junit-3.8.1.jar;E:setupmavenio
etty
etty3.7.0.Final
etty-3.7.0.Final.jar;E:setupmavenorgspringframeworkspring-webmvc4.2.1.RELEASEspring-webmvc-4.2.1.RELEASE.jar;E:setupmavenorgspringframeworkspring-beans4.2.1.RELEASEspring-beans-4.2.1.RELEASE.jar;E:setupmavenorgspringframeworkspring-context4.2.1.RELEASEspring-context-4.2.1.RELEASE.jar;E:setupmavenorgspringframeworkspring-aop4.2.1.RELEASEspring-aop-4.2.1.RELEASE.jar;E:setupmavenaopallianceaopalliance1.0aopalliance-1.0.jar;E:setupmavenorgspringframeworkspring-core4.2.1.RELEASEspring-core-4.2.1.RELEASE.jar;E:setupmavencommons-loggingcommons-logging1.2commons-logging-1.2.jar;E:setupmavenorgspringframeworkspring-expression4.2.1.RELEASEspring-expression-4.2.1.RELEASE.jar;E:setupmavenorgspringframeworkspring-web4.2.1.RELEASEspring-web-4.2.1.RELEASE.jar
引导类路径:D:jre1.7lib
esources.jar;D:jre1.7lib
t.jar;D:jre1.7libsunrsasign.jar;D:jre1.7libjsse.jar;D:jre1.7libjce.jar;D:jre1.7libcharsets.jar;D:jre1.7libjfr.jar;D:jre1.7classes
库路径:D:jre1.7in;C:WindowsSunJavain;C:Windowssystem32;C:Windows;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;C:Program FilesJavajdk1.6.0_45in;C:Program FilesJavajdk1.6.0_45jrein;D:softsvn1.8in;D:apache-maven-3.2.3in;D:mysql5.7MySQL Server 5.7in;D:mysql5.7MySQL Utilities 1.3.5;D:mongoDB;.
===========打印内存管理器信息==========
vm内存管理器：名称=CodeCacheManager,管理的内存区=[Code Cache],ObjectName=java.lang:type=MemoryManager,name=CodeCacheManager
vm内存管理器：名称=PS Scavenge,管理的内存区=[PS Eden Space, PS Survivor Space],ObjectName=java.lang:type=GarbageCollector,name=PS Scavenge
vm内存管理器：名称=PS MarkSweep,管理的内存区=[PS Eden Space, PS Survivor Space, PS Old Gen, PS Perm Gen],ObjectName=java.lang:type=GarbageCollector,name=PS MarkSweep
===========打印垃圾回收信息==========
垃圾收集器：名称=PS Scavenge,收集=0,总花费时间=0,内存区名称=[PS Eden Space, PS Survivor Space]
垃圾收集器：名称=PS MarkSweep,收集=0,总花费时间=0,内存区名称=[PS Eden Space, PS Survivor Space, PS Old Gen, PS Perm Gen]
===========打印vm内存信息==========
head堆:
    初始(M):94
    最大(上限)(M):1344
    当前(已使用)(M):1
    提交的内存(已申请)(M):91
    使用率:1%
non-head非堆:
    初始(M):23
    最大(上限)(M):130
    当前(已使用)(M):3
    提交的内存(已申请)(M):23
    使用率:13%
===========打印vm各内存区信息==========
vm内存区:
    名称=Code Cache
    所属内存管理者=[CodeCacheManager]
     ObjectName=java.lang:type=MemoryPool,name=Code Cache
    初始大小(M)=2
    最大(上限)(M)=48
    已用大小(M)=0
    已提交(已申请)(M)=2
    使用率=15%
vm内存区:
    名称=PS Eden Space
    所属内存管理者=[PS MarkSweep, PS Scavenge]
     ObjectName=java.lang:type=MemoryPool,name=PS Eden Space
    初始大小(M)=24
    最大(上限)(M)=497
    已用大小(M)=1
    已提交(已申请)(M)=24
    使用率=6%
vm内存区:
    名称=PS Survivor Space
    所属内存管理者=[PS MarkSweep, PS Scavenge]
     ObjectName=java.lang:type=MemoryPool,name=PS Survivor Space
    初始大小(M)=3
    最大(上限)(M)=3
    已用大小(M)=0
    已提交(已申请)(M)=3
    使用率=0%
vm内存区:
    名称=PS Old Gen
    所属内存管理者=[PS MarkSweep]
     ObjectName=java.lang:type=MemoryPool,name=PS Old Gen
    初始大小(M)=63
    最大(上限)(M)=1008
    已用大小(M)=0
    已提交(已申请)(M)=63
    使用率=0%
vm内存区:
    名称=PS Perm Gen
    所属内存管理者=[PS MarkSweep]
     ObjectName=java.lang:type=MemoryPool,name=PS Perm Gen
    初始大小(M)=21
    最大(上限)(M)=82
    已用大小(M)=2
    已提交(已申请)(M)=21
    使用率=13%
===========打印线程==========
ObjectName=java.lang:type=Threading
仍活动的线程总数=5
峰值=5
线程总数（被创建并执行过的线程总数）=5
当初仍活动的守护线程（daemonThread）总数=4
所有线程信息:
        线程名称                    状态                  线程id
        Attach Listener                 RUNNABLE                    5
        Signal Dispatcher                   RUNNABLE                    4
        Finalizer                   WAITING                 3
        Reference Handler                   WAITING                 2
        main                    RUNNABLE                    1