https://www.oracle.com/java/technologies/javase/javase8u211-later-archive-downloads.html
一 RPM包安装
rpm -ivh jdk-8u391-linux-x64.rpm/etc/profile
export JAVA_HOME=/usr/java/jdk1.8.0-x64
export PATH=$JAVA_HOME/bin:$PATHsource /etc/profile
二 tar.gz 包手动安装
tar -zxvf jdk-版本号-linux-架构.tar.gz
export JAVA_HOME=/usr/local/java/jdk-版本号
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib
export PATH=$JAVA_HOME/bin:$PATHsource /etc/profile
