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sysprop
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=======================
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> 查看当前JVM的系统属性(`System Property`)
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### 使用参考
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```
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USAGE:
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sysprop [-h] [property-name] [property-value]
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SUMMARY:
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Display, and change all the system properties.
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EXAMPLES:
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sysprop
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sysprop file.encoding
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sysprop production.mode true
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WIKI:
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https://alibaba.github.io/arthas/sysprop
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OPTIONS:
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-h, --help this help
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<property-name> property name
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<property-value> property value
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```
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#### 查看所有属性
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```
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$ sysprop
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KEY VALUE
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-------------------------------------------------------------------------------------------------------------------------------------
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java.runtime.name Java(TM) SE Runtime Environment
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sun.boot.library.path /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/lib
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java.vm.version 25.51-b03
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user.country.format CN
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gopherProxySet false
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java.vm.vendor Oracle Corporation
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java.vendor.url http://java.oracle.com/
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path.separator :
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java.vm.name Java HotSpot(TM) 64-Bit Server VM
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file.encoding.pkg sun.io
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user.country US
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sun.java.launcher SUN_STANDARD
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sun.os.patch.level unknown
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java.vm.specification.name Java Virtual Machine Specification
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user.dir /private/var/tmp
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java.runtime.version 1.8.0_51-b16
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java.awt.graphicsenv sun.awt.CGraphicsEnvironment
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java.endorsed.dirs /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/lib/endors
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ed
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os.arch x86_64
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java.io.tmpdir /var/folders/2c/tbxwzs4s4sbcvh7frbcc7n000000gn/T/
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line.separator
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java.vm.specification.vendor Oracle Corporation
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os.name Mac OS X
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sun.jnu.encoding UTF-8
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java.library.path /Users/wangtao/Library/Java/Extensions:/Library/Java/Extensions:/Network/Libra
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ry/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.
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sun.nio.ch.bugLevel
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java.specification.name Java Platform API Specification
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java.class.version 52.0
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sun.management.compiler HotSpot 64-Bit Tiered Compilers
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os.version 10.12.6
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user.home /Users/wangtao
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user.timezone Asia/Shanghai
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java.awt.printerjob sun.lwawt.macosx.CPrinterJob
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file.encoding UTF-8
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java.specification.version 1.8
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user.name wangtao
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java.class.path .
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java.vm.specification.version 1.8
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sun.arch.data.model 64
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java.home /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre
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sun.java.command Test
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java.specification.vendor Oracle Corporation
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user.language en
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awt.toolkit sun.lwawt.macosx.LWCToolkit
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java.vm.info mixed mode
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java.version 1.8.0_51
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java.ext.dirs /Users/wangtao/Library/Java/Extensions:/Library/Java/JavaVirtualMachines/jdk1.
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8.0_51.jdk/Contents/Home/jre/lib/ext:/Library/Java/Extensions:/Network/Library
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/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java
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sun.boot.class.path /Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/lib/resour
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ces.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/li
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b/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/Home/jre/l
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ib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Contents/H
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ome/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Content
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s/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jdk/Conte
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nts/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.jd
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k/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_51.
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jdk/Contents/Home/jre/classes
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java.vendor Oracle Corporation
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file.separator /
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java.vendor.url.bug http://bugreport.sun.com/bugreport/
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sun.cpu.endian little
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sun.io.unicode.encoding UnicodeBig
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sun.cpu.isalist
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```
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|
|
|
|
#### 查看单个属性
|
|
|
|
|
|
|
|
|
|
> 支持通过`TAB`键自动补全
|
|
|
|
|
|
|
|
|
|
```
|
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$ sysprop java.version
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java.version=1.8.0_51
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```
|
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#### 修改单个属性
|
|
|
|
|
|
|
|
|
|
```
|
|
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|
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$ sysprop user.country
|
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|
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user.country=US
|
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$ sysprop user.country CN
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|
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Successfully changed the system property.
|
|
|
|
|
user.country=CN
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|
|
```
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