linux配置jdk环境变量

vim /etc/profile

export JAVA_HOME=/opt/java/java-se-8u41-ri  #jdk安装目录
 
export JRE_HOME=${JAVA_HOME}/jre
 
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib:$CLASSPATH
 
export JAVA_PATH=${JAVA_HOME}/bin:${JRE_HOME}/bin
 
export PATH=$PATH:${JAVA_PATH}

source /etc/profile