centos 安装java

jdk-8u181-linux-x64.tar.gz

tar -zxvf jdk-8u181-linux-x64.tar.gz

vim /etc/profile

JAVA_HOME=/opt/soft/jdk1.8.0_181
PATH=$PATH:$JAVA_HOME/bin

export JAVA_HOME PATH

source /etc/profile

export JAVA_HOME=/java/jdk-12.0.1
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=.:$JAVA_HOME/bin:$JRE_HOME/bin:$KE_HOME/bin:${MAVEN_HOME}/bin:$PATH