有時候想看一下jvm環境的user.home、file.encoding等參數，可以通過下面的命令查看：

java -XshowSettings:all -version --------------------------------- VM settings:Max. Heap Size (Estimated): 1.76GErgonomics Machine Class: clientUsing VM: Java HotSpot(TM) 64-Bit Server VMProperty settings:awt.toolkit = sun.awt.windows.WToolkitfile.encoding = GBKfile.encoding.pkg = sun.iofile.separator = \java.awt.graphicsenv = sun.awt.Win32GraphicsEnvironmentjava.awt.printerjob = sun.awt.windows.WPrinterJobjava.class.path = .java.class.version = 52.0java.endorsed.dirs = C:\Program Files\Java\jdk1.8.0_144\jre\lib\endorsedjava.ext.dirs = C:\Program Files\Java\jdk1.8.0_144\jre\lib\extC:\WINDOWS\Sun\Java\lib\extjava.home = C:\Program Files\Java\jdk1.8.0_144\jrejava.io.tmpdir = C:\Users\xxx\AppData\Local\Temp\java.library.path = C:\Program Files\Java\jdk1.8.0_144\binC:\WINDOWS\Sun\Java\binC:\WINDOWS\system32C:\WINDOWSC:\Program Files\Java\jdk1.8.0_144\binC:\ProgramData\Oracle\Java\javapathC:\Windows\System32C:\WINDOWS\system32C:\WINDOWSC:\WINDOWS\System32\WbemC:\WINDOWS\System32\WindowsPowerShell\v1.0\D:\javavn\mvn\apache-maven-3.5.0\binC:\Program Files (x86)\PuTTY\C:\Users\xxx\AppData\Local\Microsoft\WindowsApps.java.runtime.name = Java(TM) SE Runtime Environmentjava.runtime.version = 1.8.0_144-b01java.specification.name = Java Platform API Specificationjava.specification.vendor = Oracle Corporationjava.specification.version = 1.8java.vendor = Oracle Corporationjava.vendor.url = http://java.oracle.com/java.vendor.url.bug = http://bugreport.sun.com/bugreport/java.version = 1.8.0_144java.vm.info = mixed modejava.vm.name = Java HotSpot(TM) 64-Bit Server VMjava.vm.specification.name = Java Virtual Machine Specificationjava.vm.specification.vendor = Oracle Corporationjava.vm.specification.version = 1.8java.vm.vendor = Oracle Corporationjava.vm.version = 25.144-b01line.separator = \r \nos.arch = amd64os.name = Windows 10os.version = 10.0path.separator = ;sun.arch.data.model = 64sun.boot.class.path = C:\Program Files\Java\jdk1.8.0_144\jre\lib\resources.jarC:\Program Files\Java\jdk1.8.0_144\jre\lib\rt.jarC:\Program Files\Java\jdk1.8.0_144\jre\lib\sunrsasign.jarC:\Program Files\Java\jdk1.8.0_144\jre\lib\jsse.jarC:\Program Files\Java\jdk1.8.0_144\jre\lib\jce.jarC:\Program Files\Java\jdk1.8.0_144\jre\lib\charsets.jarC:\Program Files\Java\jdk1.8.0_144\jre\lib\jfr.jarC:\Program Files\Java\jdk1.8.0_144\jre\classessun.boot.library.path = C:\Program Files\Java\jdk1.8.0_144\jre\binsun.cpu.endian = littlesun.cpu.isalist = amd64sun.desktop = windowssun.io.unicode.encoding = UnicodeLittlesun.java.launcher = SUN_STANDARDsun.jnu.encoding = GBKsun.management.compiler = HotSpot 64-Bit Tiered Compilerssun.os.patch.level =sun.stderr.encoding = ms936sun.stdout.encoding = ms936user.country = CNuser.dir = C:\Users\xxxuser.home = C:\Users\xxxuser.language = zhuser.name = xxxuser.script =user.timezone =user.variant =Locale settings:default locale = 中文default display locale = 中文 (中國)default format locale = 中文 (中國)available locales = , ar, ar_AE, ar_BH, ar_DZ, ar_EG, ar_IQ, ar_JO,ar_KW, ar_LB, ar_LY, ar_MA, ar_OM, ar_QA, ar_SA, ar_SD,ar_SY, ar_TN, ar_YE, be, be_BY, bg, bg_BG, ca,ca_ES, cs, cs_CZ, da, da_DK, de, de_AT, de_CH,de_DE, de_GR, de_LU, el, el_CY, el_GR, en, en_AU,en_CA, en_GB, en_IE, en_IN, en_MT, en_NZ, en_PH, en_SG,en_US, en_ZA, es, es_AR, es_BO, es_CL, es_CO, es_CR,es_CU, es_DO, es_EC, es_ES, es_GT, es_HN, es_MX, es_NI,es_PA, es_PE, es_PR, es_PY, es_SV, es_US, es_UY, es_VE,et, et_EE, fi, fi_FI, fr, fr_BE, fr_CA, fr_CH,fr_FR, fr_LU, ga, ga_IE, hi, hi_IN, hr, hr_HR,hu, hu_HU, in, in_ID, is, is_IS, it, it_CH,it_IT, iw, iw_IL, ja, ja_JP, ja_JP_JP_#u-ca-japanese, ko, ko_KR,lt, lt_LT, lv, lv_LV, mk, mk_MK, ms, ms_MY,mt, mt_MT, nl, nl_BE, nl_NL, no, no_NO, no_NO_NY,pl, pl_PL, pt, pt_BR, pt_PT, ro, ro_RO, ru,ru_RU, sk, sk_SK, sl, sl_SI, sq, sq_AL, sr,sr_BA, sr_BA_#Latn, sr_CS, sr_ME, sr_ME_#Latn, sr_RS, sr_RS_#Latn, sr__#Latn,sv, sv_SE, th, th_TH, th_TH_TH_#u-nu-thai, tr, tr_TR, uk,uk_UA, vi, vi_VN, zh, zh_CN, zh_HK, zh_SG, zh_TWjava version "1.8.0_144" Java(TM) SE Runtime Environment (build 1.8.0_144-b01) Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

也可以分別查看：

java -XshowSettings:vm -version java -XshowSettings:properties -version java -XshowSettings:locale -version

總結

以上是生活随笔為你收集整理的java命令查看环境变量 user.home file.encoding等参数值的全部內容，希望文章能夠幫你解決所遇到的問題。

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