java-System.getEnv()与System.getProperties()

System.getenv() -获取在操作系统中配置的变量，例如配置在.bash_profiles中的变量

SHELL : /bin/bash

TMPDIR : /var/folders/ds/jh5_6dhd0_14jwrx4tb5nr6r0000gn/T/

JAVA_HOME : /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home

__CF_USER_TEXT_ENCODING : 0x1F5:0x19:0x34

PATH : /usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/panhongliang/gradle-2.4/bin

GRADLE_HOME : /Users/panhongliang/gradle-2.4

VERSIONER_PYTHON_VERSION : 2.7

XPC_FLAGS : 0x0

JAVA_7_HOME : /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home

USER : panhongliang

JAVA_8_HOME : /Library/Java/JavaVirtualMachines/jdk1.8.0_45.jdk/Contents/Home

HOME : /Users/panhongliang

LOGNAME : panhongliang

XPC_SERVICE_NAME : com.jetbrains.intellij.40076

JAVA_MAIN_CLASS_3984 : com.intellij.rt.execution.application.AppMain

Apple_PubSub_Socket_Render : /private/tmp/com.apple.launchd.XRXXMvBOfx/Render

SSH_AUTH_SOCK : /private/tmp/com.apple.launchd.e7ko4A8O5t/Listeners

VERSIONER_PYTHON_PREFER_32_BIT : no

System.getProperties()-获取系统（操作系统和JVM，有些JVM系统变量值取决于当前操作系统）相关的变量。

java.runtime.name : Java(TM) SE Runtime Environment

sun.boot.library.path : /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib

java.vm.version : 24.79-b02

gopherProxySet : false

java.vm.vendor : Oracle Corporation

java.vendor.url : http://java.oracle.com/
path.separator : :

java.vm.name : Java HotSpot(TM) 64-Bit Server VM

file.encoding.pkg : sun.io

idea.launcher.port : 7535

user.country : CN

sun.java.launcher : SUN_STANDARD

sun.os.patch.level : unknown

java.vm.specification.name : Java Virtual Machine Specification

user.dir : /Users/panhongliang/dubbo-master

java.runtime.version : 1.7.0_79-b15

java.awt.graphicsenv : sun.awt.CGraphicsEnvironment

java.endorsed.dirs : /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/endorsed

os.arch : x86_64

java.io.tmpdir : /var/folders/ds/jh5_6dhd0_14jwrx4tb5nr6r0000gn/T/

line.separator :

java.vm.specification.vendor : Oracle Corporation

os.name : Mac OS X

sun.jnu.encoding : UTF-8

java.library.path : /Users/panhongliang/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.

java.specification.name : Java Platform API Specification

java.class.version : 51.0

sun.management.compiler : HotSpot 64-Bit Tiered Compilers

os.version : 10.10.3

user.home : /Users/panhongliang

user.timezone :

java.awt.printerjob : sun.lwawt.macosx.CPrinterJob

file.encoding : UTF-8

idea.launcher.bin.path : /Applications/IntelliJ IDEA 14.app/Contents/bin

java.specification.version : 1.7

user.name : panhongliang

java.class.path : /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/lib/javafx-doclet.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/lib/tools.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/htmlconverter.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Users/panhongliang/dubbo-master/dubbo-demo/dubbo-demo-provider/target/test-classes:/Users/panhongliang/dubbo-master/dubbo-demo/dubbo-demo-provider/target/classes:/Users/panhongliang/dubbo-master/dubbo-demo/dubbo-demo-api/target/classes:/Users/panhongliang/dubbo-master/dubbo-config/dubbo-config-api/target/classes:/Users/panhongliang/dubbo-master/dubbo-registry/dubbo-registry-api/target/classes:/Users/panhongliang/dubbo-master/dubbo-cluster/target/classes:/Users/panhongliang/dubbo-master/dubbo-monitor/dubbo-monitor-api/target/classes:/Users/panhongliang/dubbo-master/dubbo-remoting/dubbo-remoting-api/target/classes:/Users/panhongliang/dubbo-master/dubbo-filter/dubbo-filter-validation/target/classes:/Users/panhongliang/dubbo-master/dubbo-filter/dubbo-filter-cache/target/classes:/Users/panhongliang/dubbo-master/dubbo-config/dubbo-config-spring/target/classes:/Users/panhongliang/dubbo-master/dubbo-remoting/dubbo-remoting-netty/target/classes:/Users/panhongliang/dubbo-master/dubbo-remoting/dubbo-remoting-mina/target/classes:/Users/panhongliang/dubbo-master/dubbo-remoting/dubbo-remoting-grizzly/target/classes:/Users/panhongliang/dubbo-master/dubbo-remoting/dubbo-remoting-p2p/target/classes:/Users/panhongliang/dubbo-master/dubbo-remoting/dubbo-remoting-http/target/classes:/Users/panhongliang/dubbo-master/dubbo-common/target/classes:/Users/panhongliang/dubbo-master/hessian-lite/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-default/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-api/target/classes:/Users/panhongliang/dubbo-master/dubbo-container/dubbo-container-api/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-injvm/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-rmi/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-hessian/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-http/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-webservice/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-thrift/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-memcached/target/classes:/Users/panhongliang/dubbo-master/dubbo-rpc/dubbo-rpc-redis/target/classes:/Users/panhongliang/dubbo-master/dubbo-registry/dubbo-registry-default/target/classes:/Users/panhongliang/dubbo-master/dubbo-registry/dubbo-registry-multicast/target/classes:/Users/panhongliang/dubbo-master/dubbo-registry/dubbo-registry-zookeeper/target/classes:/Users/panhongliang/dubbo-master/dubbo-remoting/dubbo-remoting-zookeeper/target/classes:/Users/panhongliang/dubbo-master/dubbo-registry/dubbo-registry-redis/target/classes:/Users/panhongliang/dubbo-master/dubbo-monitor/dubbo-monitor-default/target/classes:/Users/panhongliang/dubbo-master/dubbo-container/dubbo-container-spring/target/classes:/Users/panhongliang/dubbo-master/dubbo-container/dubbo-container-jetty/target/classes:/Users/panhongliang/dubbo-master/dubbo-container/dubbo-container-log4j/target/classes:/Users/panhongliang/dubbo-master/dubbo-container/dubbo-container-logback/target/classes:/Users/panhongliang/.m2/repository/org/springframework/spring/2.5.6.SEC03/spring-2.5.6.SEC03.jar:/Users/panhongliang/.m2/repository/commons-logging/commons-logging/1.1.1/commons-logging-1.1.1.jar:/Users/panhongliang/.m2/repository/org/javassist/javassist/3.15.0-GA/javassist-3.15.0-GA.jar:/Users/panhongliang/.m2/repository/org/jboss/netty/netty/3.2.5.Final/netty-3.2.5.Final.jar:/Users/panhongliang/.m2/repository/org/apache/mina/mina-core/1.1.7/mina-core-1.1.7.jar:/Users/panhongliang/.m2/repository/org/glassfish/grizzly/grizzly-core/2.1.4/grizzly-core-2.1.4.jar:/Users/panhongliang/.m2/repository/org/glassfish/grizzly/grizzly-framework/2.1.4/grizzly-framework-2.1.4.jar:/Users/panhongliang/.m2/repository/org/glassfish/gmbal/gmbal-api-only/3.0.0-b023/gmbal-api-only-3.0.0-b023.jar:/Users/panhongliang/.m2/repository/org/glassfish/external/management-api/3.0.0-b012/management-api-3.0.0-b012.jar:/Users/panhongliang/.m2/repository/org/glassfish/grizzly/grizzly-portunif/2.1.4/grizzly-portunif-2.1.4.jar:/Users/panhongliang/.m2/repository/org/glassfish/grizzly/grizzly-rcm/2.1.4/grizzly-rcm-2.1.4.jar:/Users/panhongliang/.m2/repository/org/apache/httpcomponents/httpclient/4.1.2/httpclient-4.1.2.jar:/Users/panhongliang/.m2/repository/org/apache/httpcomponents/httpcore/4.1.2/httpcore-4.1.2.jar:/Users/panhongliang/.m2/repository/commons-codec/commons-codec/1.4/commons-codec-1.4.jar:/Users/panhongliang/.m2/repository/com/alibaba/fastjson/1.1.39/fastjson-1.1.39.jar:/Users/panhongliang/.m2/repository/com/thoughtworks/xstream/xstream/1.4.1/xstream-1.4.1.jar:/Users/panhongliang/.m2/repository/xmlpull/xmlpull/1.1.3.1/xmlpull-1.1.3.1.jar:/Users/panhongliang/.m2/repository/xpp3/xpp3_min/1.1.4c/xpp3_min-1.1.4c.jar:/Users/panhongliang/.m2/repository/org/apache/bsf/bsf-api/3.1/bsf-api-3.1.jar:/Users/panhongliang/.m2/repository/org/apache/zookeeper/zookeeper/3.3.3/zookeeper-3.3.3.jar:/Users/panhongliang/.m2/repository/jline/jline/0.9.94/jline-0.9.94.jar:/Users/panhongliang/.m2/repository/com/github/sgroschupf/zkclient/0.1/zkclient-0.1.jar:/Users/panhongliang/.m2/repository/com/netflix/curator/curator-framework/1.1.16/curator-framework-1.1.16.jar:/Users/panhongliang/.m2/repository/com/netflix/curator/curator-client/1.1.16/curator-client-1.1.16.jar:/Users/panhongliang/.m2/repository/com/google/guava/guava/11.0.1/guava-11.0.1.jar:/Users/panhongliang/.m2/repository/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar:/Users/panhongliang/.m2/repository/com/googlecode/xmemcached/xmemcached/1.3.6/xmemcached-1.3.6.jar:/Users/panhongliang/.m2/repository/org/apache/cxf/cxf-rt-frontend-simple/2.6.1/cxf-rt-frontend-simple-2.6.1.jar:/Users/panhongliang/.m2/repository/org/apache/cxf/cxf-api/2.6.1/cxf-api-2.6.1.jar:/Users/panhongliang/.m2/repository/org/codehaus/woodstox/woodstox-core-asl/4.1.2/woodstox-core-asl-4.1.2.jar:/Users/panhongliang/.m2/repository/org/codehaus/woodstox/stax2-api/3.1.1/stax2-api-3.1.1.jar:/Users/panhongliang/.m2/repository/org/apache/ws/xmlschema/xmlschema-core/2.0.2/xmlschema-core-2.0.2.jar:/Users/panhongliang/.m2/repository/org/apache/geronimo/specs/geronimo-javamail_1.4_spec/1.7.1/geronimo-javamail_1.4_spec-1.7.1.jar:/Users/panhongliang/.m2/repository/wsdl4j/wsdl4j/1.6.2/wsdl4j-1.6.2.jar:/Users/panhongliang/.m2/repository/org/apache/cxf/cxf-rt-core/2.6.1/cxf-rt-core-2.6.1.jar:/Users/panhongliang/.m2/repository/com/sun/xml/bind/jaxb-impl/2.1.13/jaxb-impl-2.1.13.jar:/Users/panhongliang/.m2/repository/org/apache/cxf/cxf-rt-bindings-soap/2.6.1/cxf-rt-bindings-soap-2.6.1.jar:/Users/panhongliang/.m2/repository/org/apache/cxf/cxf-rt-databinding-jaxb/2.6.1/cxf-rt-databinding-jaxb-2.6.1.jar:/Users/panhongliang/.m2/repository/org/apache/cxf/cxf-rt-transports-http/2.6.1/cxf-rt-transports-http-2.6.1.jar:/Users/panhongliang/.m2/repository/org/apache/thrift/libthrift/0.8.0/libthrift-0.8.0.jar:/Users/panhongliang/.m2/repository/commons-lang/commons-lang/2.5/commons-lang-2.5.jar:/Users/panhongliang/.m2/repository/com/caucho/hessian/4.0.7/hessian-4.0.7.jar:/Users/panhongliang/.m2/repository/javax/servlet/servlet-api/2.5/servlet-api-2.5.jar:/Users/panhongliang/.m2/repository/org/mortbay/jetty/jetty/6.1.26/jetty-6.1.26.jar:/Users/panhongliang/.m2/repository/org/mortbay/jetty/jetty-util/6.1.26/jetty-util-6.1.26.jar:/Users/panhongliang/.m2/repository/org/mortbay/jetty/servlet-api/2.5-20081211/servlet-api-2.5-20081211.jar:/Users/panhongliang/.m2/repository/log4j/log4j/1.2.16/log4j-1.2.16.jar:/Users/panhongliang/.m2/repository/org/slf4j/slf4j-api/1.6.2/slf4j-api-1.6.2.jar:/Users/panhongliang/.m2/repository/redis/clients/jedis/2.1.0/jedis-2.1.0.jar:/Users/panhongliang/.m2/repository/commons-pool/commons-pool/1.5.5/commons-pool-1.5.5.jar:/Users/panhongliang/.m2/repository/javax/validation/validation-api/1.0.0.GA/validation-api-1.0.0.GA.jar:/Users/panhongliang/.m2/repository/org/hibernate/hibernate-validator/4.2.0.Final/hibernate-validator-4.2.0.Final.jar:/Users/panhongliang/.m2/repository/javax/cache/cache-api/0.4/cache-api-0.4.jar:/Users/panhongliang/.m2/repository/junit/junit/4.10/junit-4.10.jar:/Users/panhongliang/.m2/repository/org/hamcrest/hamcrest-core/1.1/hamcrest-core-1.1.jar:/Users/panhongliang/.m2/repository/org/easymock/easymock/3.0/easymock-3.0.jar:/Users/panhongliang/.m2/repository/cglib/cglib-nodep/2.2/cglib-nodep-2.2.jar:/Users/panhongliang/.m2/repository/org/objenesis/objenesis/1.2/objenesis-1.2.jar:/Users/panhongliang/.m2/repository/org/easymock/easymockclassextension/3.0/easymockclassextension-3.0.jar:/Users/panhongliang/.m2/repository/com/googlecode/jmockit/jmockit/0.999.8/jmockit-0.999.8.jar:/Applications/IntelliJ
IDEA 14.app/Contents/lib/idea_rt.jar

java.vm.specification.version : 1.7

sun.arch.data.model : 64

java.home : /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre

sun.java.command : com.intellij.rt.execution.application.AppMain com.alibaba.dubbo.demo.provider.DemoProvider abc

java.specification.vendor : Oracle Corporation

user.language : zh

awt.toolkit : sun.lwawt.macosx.LWCToolkit

java.vm.info : mixed mode

java.version : 1.7.0_79

java.ext.dirs : /Users/panhongliang/Library/Java/Extensions:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/ext:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java

sun.boot.class.path : /Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home/jre/classes

java.vendor : Oracle Corporation

file.separator : /

java.vendor.url.bug : http://bugreport.sun.com/bugreport/
sun.cpu.endian : little

sun.io.unicode.encoding : UnicodeBig

a : b

sun.cpu.isalist :