vim /etc/profile

#### set java enrironment
export JAVA_HOME=/usr/local/java/jdk-11.0.1
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

#### set maven enrironment
export MAVEN_HOME=/app/apache-maven-3.8.4
export PATH=$MAVEN_HOME/bin:$PATH

source /etc/profile

mac 环境变量

open -e .bash_profile

#### set java enrironment
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_311.jdk/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH:.
export CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:.
#### set maven enrironment
export MAVEN_HOME=/Users/lucene/Apache/apache-maven-3.8.4
export PATH=$MAVEN_HOME/bin:$PATH

source .bash_profile