sysprop

查看当前JVM的系统属性(System Property)

使用参考

  1.  USAGE:
  2.    sysprop [-h] [property-name] [property-value]
  3.  
  4.  SUMMARY:
  5.    Display, and change all the system properties.
  6.  
  7.  EXAMPLES:
  8.  sysprop
  9.  sysprop file.encoding
  10.  sysprop production.mode true
  11.  
  12.  WIKI:
  13.    https://alibaba.github.io/arthas/sysprop
  14.  
  15.  OPTIONS:
  16.  -h, --help                                  this help
  17.  <property-name>                             property name
  18.  <property-value>                            property value

查看所有属性

  1. $ sysprop
  2.  KEY                                                  VALUE
  3. -------------------------------------------------------------------------------------------------------------------------------------
  4.  java.runtime.name                                    Java(TM) SE Runtime Environment
  5.  sun.boot.library.path                                /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/lib
  6.  java.vm.version                                      25.51-b03
  7.  user.country.format                                  CN
  8.  gopherProxySet                                       false
  9.  java.vm.vendor                                       Oracle Corporation
  10.  java.vendor.url                                      http://java.oracle.com/
  11.  path.separator                                       :
  12.  java.vm.name                                         Java HotSpot(TM) 64-Bit Server VM
  13.  file.encoding.pkg                                    sun.io
  14.  user.country                                         US
  15.  sun.java.launcher                                    SUN_STANDARD
  16.  sun.os.patch.level                                   unknown
  17.  java.vm.specification.name                           Java Virtual Machine Specification
  18.  user.dir                                             /private/var/tmp
  19.  java.runtime.version                                 1.8.0_51-b16
  20.  java.awt.graphicsenv                                 sun.awt.CGraphicsEnvironment
  21.  java.endorsed.dirs                                   /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/lib/endors
  22.                                                       ed
  23.  os.arch                                              x86_64
  24.  java.io.tmpdir                                       /var/folders/2c/tbxwzs4s4sbcvh7frbcc7n000000gn/T/
  25.  line.separator
  26.  
  27.  java.vm.specification.vendor                         Oracle Corporation
  28.  os.name                                              Mac OS X
  29.  sun.jnu.encoding                                     UTF-8
  30.  java.library.path                                    /Users/wangtao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Libra
  31.                                                       ry/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
  32.  sun.nio.ch.bugLevel
  33.  java.specification.name                              Java Platform API Specification
  34.  java.class.version                                   52.0
  35.  sun.management.compiler                              HotSpot 64-Bit Tiered Compilers
  36.  os.version                                           10.12.6
  37.  user.home                                            /Users/wangtao
  38.  user.timezone                                        Asia/Shanghai
  39.  java.awt.printerjob                                  sun.lwawt.macosx.CPrinterJob
  40.  file.encoding                                        UTF-8
  41.  java.specification.version                           1.8
  42.  user.name                                            wangtao
  43.  java.class.path                                      .
  44.  java.vm.specification.version                        1.8
  45.  sun.arch.data.model                                  64
  46.  java.home                                            /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre
  47.  sun.java.command                                     Test
  48.  java.specification.vendor                            Oracle Corporation
  49.  user.language                                        en
  50.  awt.toolkit                                          sun.lwawt.macosx.LWCToolkit
  51.  java.vm.info                                         mixed mode
  52.  java.version                                         1.8.0_51
  53.  java.ext.dirs                                        /Users/wangtao/Library/Java/Extensions:/Library/Java/JavaVirtualMachines/jdk1.
  54.                                                       8.0_51.jdk/Contents/Home/jre/lib/ext:/Library/Java/Extensions:/Network/Library
  55.                                                       /Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
  56.  sun.boot.class.path                                  /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/lib/resour
  57.                                                       ces.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/li
  58.                                                       b/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/l
  59.                                                       ib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/H
  60.                                                       ome/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Content
  61.                                                       s/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Conte
  62.                                                       nts/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jd
  63.                                                       k/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.
  64.                                                       jdk/Contents/Home/jre/classes
  65.  java.vendor                                          Oracle Corporation
  66.  file.separator                                       /
  67.  java.vendor.url.bug                                  http://bugreport.sun.com/bugreport/
  68.  sun.cpu.endian                                       little
  69.  sun.io.unicode.encoding                              UnicodeBig
  70.  sun.cpu.isalist

查看单个属性

支持通过TAB键自动补全
  1. $ sysprop java.version
  2. java.version=1.8.0_51

修改单个属性

  1. $ sysprop user.country
  2. user.country=US
  3. $ sysprop user.country CN
  4. Successfully changed the system property.
  5. user.country=CN

原文: https://alibaba.github.io/arthas/sysprop.html