也可以下rpm包安装， rpm -ivh jdk-8u333-linux-x64.rpm
2，创建存放目录
mkdir software3，解压压缩包
tar -zxvf jdk-18_linux-x64_bin.tar.gz4，重命名为jdk8
mv jdk-18.0.1.1/ jdk85，编辑环境配置文件
vi /etc/profile
export JAVA_HOME=/usr/local/software/jdk8 export JAVA_BIN=/usr/local/software/jdk8 export PATH=$PATH:$JAVA_HOME/bin export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export JAVA_HOME JAVA_BIN PATH CLASSPATH6，刷新配置立刻生效
source /etc/profile
