linux 环境统配

#java
JAVA_HOME=/opt/jdk
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH
#node
export NODE_HOME=/opt/node
export PATH=$PATH:$NODE_HOME/bin 
export NODE_PATH=$NODE_HOME/lib/node_modules
#golang
export GOROOT=/opt/go
export PATH=$PATH:$GOROOT/bin
#maven
export MAVEN_HOME=/maven
export PATH=$PATH:$MAVEN_HOME/bin