wget下载oracleJDK

wget —no-check-certificate —no-cookies —header “Cookie: oraclelicense=accept-securebackup-cookie” http://download.oracle.com/otn-pub/java/jdk/8u181-b13/96a7b8442fe848ef90c96a2fad6ed6d1/jdk-8u181-linux-x64.tar.gz

解压

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

移动

mv jdk1.8.0_181/ /usr/lib/java

修改环境变量

vim /etc/profile

最下方添加

export JAVA_HOME=/usr/lib/java
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=${JAVA_HOME}/bin:$PATH

重新编译配置文件

source /etc/profile

验证安装

java -version