centos配置jdk环境变量

下载jdk

https://www.oracle.com/java/technologies/downloads/

增加环境变量

vi /etc/profile

export JAVA_HOME=/opt/jdk/jdk1.8.0_301
export CLASSPATH=$JAVA_HOME/lib/
export PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH

source /etc/profile

测试