一、查看命令：
mvn help :system
二、引用
在pom文件中通过 ${变量名}来引用
=============================================================================== ========================= Platform Properties Details ========================= =============================================================================== =============================================================================== System Properties =============================================================================== java.runtime.name=Java(TM) SE Runtime Environment sun.boot.library.path=C:Program FilesJavajdk1.8.0_91jrein java.vm.version=25.91-b15 java.vm.vendor=Oracle Corporation maven.multiModuleProjectDirectory=D: oolsIntelliJIDEA15.0.2IdeaProject2starwifi java.vendor.url=http://java.oracle.com/ path.separator=; guice.disable.misplaced.annotation.check=true java.vm.name=Java HotSpot(TM) 64-Bit Server VM file.encoding.pkg=sun.io user.script= user.country=CN sun.java.launcher=SUN_STANDARD sun.os.patch.level=Service Pack 1 java.vm.specification.name=Java Virtual Machine Specification user.dir=D: oolsIntelliJIDEA15.0.2IdeaProject2starwifi java.runtime.version=1.8.0_91-b15 java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment java.endorsed.dirs=C:Program FilesJavajdk1.8.0_91jrelibendorsed os.arch=amd64 java.io.tmpdir=C:UsersADMINI~1AppDataLocalTemp line.separator= java.vm.specification.vendor=Oracle Corporation user.variant= os.name=Windows 7 classworlds.conf=D: oolsapache-maven-3.3.9in..inm2.conf sun.jnu.encoding=GBK java.library.path=C:Program FilesJavajdk1.8.0_91in;C:WindowsSunJavain;C:Windowssystem32;C:Windows;C:ProgramDataOracleJavajavapath;C: Windowssystem32;C:Windows;C:Program FilesJavajdk1.8.0_91in;D: oolsapache-maven-3.3.9in;C:WindowsSystem32Wbem;C:WindowsSystem32Window sPowerShellv1.0;D: oolsgradle-3.2.1in;C:Program FilesTortoiseGitin;C:Program FilesMySQLMySQL Server 5.1in;. java.specification.name=Java Platform API Specification java.class.version=52.0 sun.management.compiler=HotSpot 64-Bit Tiered Compilers os.version=6.1 user.home=C:UsersAdministrator user.timezone=Asia/Shanghai java.awt.printerjob=sun.awt.windows.WPrinterJob java.specification.version=1.8 file.encoding=GBK user.name=Administrator java.class.path=D: oolsapache-maven-3.3.9in..ootplexus-classworlds-2.5.2.jar java.vm.specification.version=1.8 sun.arch.data.model=64 java.home=C:Program FilesJavajdk1.8.0_91jre sun.java.command=org.codehaus.plexus.classworlds.launcher.Launcher help:system java.specification.vendor=Oracle Corporation user.language=zh awt.toolkit=sun.awt.windows.WToolkit java.vm.info=mixed mode java.version=1.8.0_91 java.ext.dirs=C:Program FilesJavajdk1.8.0_91jrelibext;C:WindowsSunJavalibext sun.boot.class.path=C:Program FilesJavajdk1.8.0_91jrelib esources.jar;C:Program FilesJavajdk1.8.0_91jrelib t.jar;C:Program FilesJavajdk 1.8.0_91jrelibsunrsasign.jar;C:Program FilesJavajdk1.8.0_91jrelibjsse.jar;C:Program FilesJavajdk1.8.0_91jrelibjce.jar;C:Program Files Javajdk1.8.0_91jrelibcharsets.jar;C:Program FilesJavajdk1.8.0_91jrelibjfr.jar;C:Program FilesJavajdk1.8.0_91jreclasses sun.stderr.encoding=ms936 java.vendor=Oracle Corporation maven.home=D: oolsapache-maven-3.3.9in.. file.separator= java.vendor.url.bug=http://bugreport.sun.com/bugreport/ sun.cpu.endian=little sun.io.unicode.encoding=UnicodeLittle sun.stdout.encoding=ms936 sun.desktop=windows sun.cpu.isalist=amd64 =============================================================================== Environment Variables =============================================================================== GRADLE_USER_HOME=E:gradle_repository.gradle CLASSWORLDS_JAR="D: oolsapache-maven-3.3.9in..ootplexus-classworlds-2.5.2.jar" PSMODULEPATH=C:Windowssystem32WindowsPowerShellv1.0Modules COMMONPROGRAMW6432=C:Program FilesCommon Files PROGRAMW6432=C:Program Files WINDOWS_TRACING_LOGFILE=C:BVTBinTestsinstallpackagecsilogfile.log PROCESSOR_ARCHITECTURE=AMD64 CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher =D:=D: oolsIntelliJIDEA15.0.2IdeaProject2starwifi FP_NO_HOST_CHECK=NO PATH=C:ProgramDataOracleJavajavapath;C:Windowssystem32;C:Windows;C:Program FilesJavajdk1.8.0_91in;D: oolsapache-maven-3.3.9in;C:Wind owsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;D: oolsgradle-3.2.1in;C:Program FilesTortoiseGitin;C:Program FilesMySQLMySQL Server 5.1in PROGRAMDATA=C:ProgramData WDIR=D: SYSTEMROOT=C:Windows TMP=C:UsersADMINI~1AppDataLocalTemp PROGRAMFILES(X86)=C:Program Files (x86) EXEC_DIR=D: oolsIntelliJIDEA15.0.2IdeaProject2starwifi COMPUTERNAME=PC-20180423HOPQ OS=Windows_NT PROMPT=$P$G MAVEN_HOME=D: oolsapache-maven-3.3.9 WINDIR=C:Windows GRADLE_HOME=D: oolsgradle-3.2.1 SYSTEMDRIVE=C: =::=:: COMSPEC=C:Windowssystem32cmd.exe =C:=C:UsersAdministrator HOMEDRIVE=C: LOGONSERVER=\PC-20180423HOPQ PROCESSOR_IDENTIFIER=Intel64 Family 6 Model 69 Stepping 1, GenuineIntel COMMONPROGRAMFILES=C:Program FilesCommon Files PROGRAMFILES=C:Program Files COMMONPROGRAMFILES(X86)=C:Program Files (x86)Common Files NUMBER_OF_PROCESSORS=4 TEMP=C:UsersADMINI~1AppDataLocalTemp USERDOMAIN=PC-20180423HOPQ M2_HOME=D: oolsapache-maven-3.3.9in.. HOME=C:UsersAdministrator PROCESSOR_LEVEL=6 ERROR_CODE=0 SESSIONNAME=Console USERNAME=Administrator PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC WINDOWS_TRACING_FLAGS=3 PUBLIC=C:UsersPublic PROCESSOR_REVISION=4501 USERPROFILE=C:UsersAdministrator APPDATA=C:UsersAdministratorAppDataRoaming HOMEPATH=UsersAdministrator LOCALAPPDATA=C:UsersAdministratorAppDataLocal JAVA_HOME=C:Program FilesJavajdk1.8.0_91 ALLUSERSPROFILE=C:ProgramData MAVEN_CMD_LINE_ARGS=help:system MAVEN_PROJECTBASEDIR=D: oolsIntelliJIDEA15.0.2IdeaProject2starwifi MAVEN_JAVA_EXE="C:Program FilesJavajdk1.8.0_91injava.exe"