下载
wget http://download.oracle.com/otn-pub/java/jdk/8u161-b12/2f38c3b165be4555a1fa6e98c45e0808/jdk-8u161-linux-x64.tar.gz?AuthParam=1517807410_5aa1c0353f56511cb747d235071e9503
解压
tar -zxvf XXX.tar.gz
配置
vim /etc/profile
JAVA_HOME=/usr/local/jdk/jdk1.8.0_161
JRE_HOME=$JAVA_HOME/jre
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
CLASSPATH=:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib/dt.jar
export JAVA_HOME JRE_HOME PATH CLASSPATH
保存退出后，记得让配置生效
source /etc/profile
检查
java -version
javac
