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

发布时间：2020-12-14 06:22:30 所属栏目：Java 来源：网络整理
导读：原文地址：http://blog.csdn.net/dream_broken/article/details/49759043 想了解下某个项目的运行时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 div class="dp-highlighter bg_java" div cl

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

想了解下某个项目的运行时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

<div class="dp-highlighter bg_java">
<div class="bar">
<div class="tools">
[java]?<a class="ViewSource" title="view plain" href="http://blog.csdn.net/dream_broken/article/details/49759043#"&gt;view plain<span data-mod="popu_168"><span data-mod="popu_168">?<a class="CopyToClipboard" title="copy" href="http://blog.csdn.net/dream_broken/article/details/49759043#"&gt;copy

?
  1. ????????????
  3. ????????????}?
  5. ????????????}??

? ? 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。

<div class="dp-highlighter bg_java">
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[java]?<a class="ViewSource" title="view plain" href="http://blog.csdn.net/dream_broken/article/details/49759043#"&gt;view plain<span data-mod="popu_168"><span data-mod="popu_168">?<a class="CopyToClipboard" title="copy" href="http://blog.csdn.net/dream_broken/article/details/49759043#"&gt;copy

?
  1. ??
  21. ????
  23. ????
  25. ??????????????????
  27. ????????System.out.println(
  29. ????????
  31. ????????printCompilationInfo();??
  33. ????????System.out.println(
  35. ????????
  37. ????????printRuntimeInfo();??
  39. ????????System.out.println(
  41. ????????
  43. ????????printGarbageCollectorInfo();??
  45. ????????System.out.println(
  47. ????????
  49. ????????printMemoryPoolInfo();??
  51. ????????System.out.println(
  53. ??????????
  55. ??????
  57. ????
  59. ????????
  61. ????????
  63. ????????
  65. ????????
  67. ??????????
  69. ????????????
  71. ????????????
  73. ????????????System.out.println(
  75. ????????????System.out.println(
  77. ????????????
  79. ????????????
  81. ????????????System.out.println(
  83. ????????????System.out.println(
  85. ????}??
  87. ????
  89. ????????????
  90. [])?
  91. ????????????method.setAccessible(
  93. ????????}?
  95. ????????????????
  97. ????????????????
  99. ????????????
  101. ????????????
  103. ????????????
  105. ????}??
  107. ????
  109. ????????System.out.println(
  111. ????????
  113. ????????}??
  115. ??????
  117. ????????ClassLoadingMXBean?classLoad=?ManagementFactory.getClassLoadingMXBean();??
  119. ????????System.out.println(
  121. ??????????
  123. ??????
  125. ????????RuntimeMXBean?runtime?=?ManagementFactory.getRuntimeMXBean();??
  127. ????????System.out.println(
  129. ????????System.out.println(
  131. ????????System.out.println(
  133. ????????System.out.println(
  135. ????????
  137. ????????
  139. ????????
  141. ????????List?args?=?runtime.getInputArguments();??
  143. ????????????System.out.println(
  145. ????????????????System.out.println(arg);??
  147. ????????}??
  149. ????????System.out.println(
  151. ????}??
  153. ????
  154. ?managers?=?ManagementFactory.getMemoryManagerMXBeans();??
  155. ????????
  157. ????????????????System.out.println(
  158. ????}??
  160. ????
  161. ?garbages?=?ManagementFactory.getGarbageCollectorMXBeans();??
  162. ????????
  164. ????}??
  166. ????
  168. ????????MemoryUsage?headMemory?=?memory.getHeapMemoryUsage();??
  170. ????????System.out.println(
  172. ????????System.out.println(
  174. ????????System.out.println(
  176. ????????System.out.println(
  178. ????????System.out.println(
  180. ????????System.out.println(
  182. ????????System.out.println(
  184. ??????
  186. ????????List?pools?=?ManagementFactory.getMemoryPoolMXBeans();??
  188. ????????????
  190. ????????????????
  193. ????????????}??
  195. ????}??
  197. ????
  199. ????????System.out.println(
  200. ????????
  202. ?????????
  204. ????????????System.out.println(
  206. ????????????
  208. ????????????????????????+
  210. ????????????}??
  212. ????????
  213. ?
  214. ????????????ThreadInfo[]?threadInfos?=?thread.getThreadInfo(threadIds);??
  216. ????????????System.out.println(
  218. ????????????????System.out.println(
  220. ????????????}??
  222. ??????????
  224. ??????
  226. ????????
  228. ????????????????||?
  230. }??

<div class="dp-highlighter bg_plain">
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[plain]?<a class="ViewSource" title="view plain" href="http://blog.csdn.net/dream_broken/article/details/49759043#"&gt;view plain<span data-mod="popu_168"><span data-mod="popu_168">?<a class="CopyToClipboard" title="copy" href="http://blog.csdn.net/dream_broken/article/details/49759043#"&gt;copy

?
  1. 系统名称:Windows?7??
  3. 操作系统的架构:amd64??
  5. 总物理内存(M):6041??
  7. 剩余物理内存(M):653??
  9. 已用交换空间(M):15817??
  11. ===========打印编译信息==========??
  13. 总编译时间：0秒??
  15. 已加载类总数：410??
  17. 已卸载类总数：0??
  19. 进程PID=386220??
  21. jvm规范运营商:Oracle?Corporation??
  23. jvm启动时间（毫秒）:1447134405258??
  25. ,?sun.java.command=com.fei.JvmInfo,?java.vm.specification.vendor=Oracle?Corporation,?java.vm.vendor=Oracle?Corporation,?java.class.path=E:test2test200targetclasses;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:setupmavenionettynetty3.7.0.Finalnetty-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:jre1.7libresources.jar;D:jre1.7librt.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:jre1.7bin,?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:jre1.7bin;C:WindowsSunJavabin;C:Windowssystem32;C:Windows;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;C:Program?FilesJavajdk1.6.0_45bin;C:Program?FilesJavajdk1.6.0_45jrebin;D:softsvn1.8bin;D:apache-maven-3.2.3bin;D:mysql5.7MySQL?Server?5.7bin;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}??
  27. jvm名称:Java?HotSpot(TM)?64-Bit?Server?VM??
  29. jvm实现版本:24.80-b11??
  31. -Dfile.encoding=UTF-8??
  33. 引导类路径:D:jre1.7libresources.jar;D:jre1.7librt.jar;D:jre1.7libsunrsasign.jar;D:jre1.7libjsse.jar;D:jre1.7libjce.jar;D:jre1.7libcharsets.jar;D:jre1.7libjfr.jar;D:jre1.7classes??
  35. ===========打印内存管理器信息==========??
  37. 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??
  39. ===========打印垃圾回收信息==========??
  41. 垃圾收集器：名称=PS?MarkSweep,?PS?Perm?Gen]??
  43. head堆:??
  45. ????最大(上限)(M):1344??
  47. ????提交的内存(已申请)(M):91??
  49. non-head非堆:??
  51. ????最大(上限)(M):130??
  53. ????提交的内存(已申请)(M):23??
  55. ===========打印vm各内存区信息==========??
  57. ????名称=Code?Cache??
  59. ?????ObjectName=java.lang:type=MemoryPool,name=Code?Cache??
  61. ????最大(上限)(M)=48??
  63. ????已提交(已申请)(M)=2??
  65. vm内存区:??
  67. ????所属内存管理者=[PS?MarkSweep,?PS?Scavenge]??
  69. ????初始大小(M)=24??
  71. ????已用大小(M)=1??
  73. ????使用率=6%??
  75. ????名称=PS?Survivor?Space??
  77. ?????ObjectName=java.lang:type=MemoryPool,name=PS?Survivor?Space??
  79. ????最大(上限)(M)=3??
  81. ????已提交(已申请)(M)=3??
  83. vm内存区:??
  85. ????所属内存管理者=[PS?MarkSweep]??
  87. ????初始大小(M)=63??
  89. ????已用大小(M)=0??
  91. ????使用率=0%??
  93. ????名称=PS?Perm?Gen??
  95. ?????ObjectName=java.lang:type=MemoryPool,name=PS?Perm?Gen??
  97. ????最大(上限)(M)=82??
  99. ????已提交(已申请)(M)=21??
  101. ===========打印线程==========??
  103. 仍活动的线程总数=5??
  105. 线程总数（被创建并执行过的线程总数）=5??
  107. 所有线程信息:??
  109. ????????Attach?Listener?????????????????RUNNABLE????????????????????5??
  111. ????????Finalizer???????????????????WAITING?????????????????3??
  113. ????????main????????????????????RUNNABLE????????????????????1??

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