[Centos7]安装jdk8

下载 jdk8

#下载地址：http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
rpm -qa | grep -i jdk
yum remove -y java-1.7.0-openjdk-headless-1.7.0.221-2.6.18.0.el7_6.x86_64
tar -zxvf jdk-8u221-linux-x64.tar.gz -C /usr/local
ln -sf /usr/local/jdk1.8.0_221 /usr/local/jdk1.8

vim /etc/profile

#JAVA1.8
export JAVA_HOME=/usr/local/jdk1.8
export CLASSPATH=.:$JAVA_HOME/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH
source /etc/profile