centos 配置java 和maven环境变量

vi /etc/profile

JAVA_HOME=/usr/local/java/jdk1.7.0_79
JRE_HOME=/usr/local/java/jdk1.7.0_79/jre
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/jt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
export JAVA_HOME JRE_HOME PATH CLASSPATH

MAVEN_HOME=/usr/local/maven/apache-maven-3.0.5
export MAVEN_HOME
PATH=$PATH:$MAVEN_HOME/bin

source /etc/profile