1.下载jdk
可以从ORACLE官网中找到 JDK下载地址(需要登录)
wget -O jdk-8u271-linux-x64.tar.gz https://download.oracle.com/otn/java/jdk/8u271-b09/61ae65e088624f5aaa0b1d2d801acb16/jdk-8u271-linux-x64.tar.gz?AuthParam=1609127582_5bb9de5dd9c79c8413dcead9899e456b
2.解压缩
tar -zxvf jdk-8u271-linux-x64.tar.gz (x表示解压 z表示gz包，v显示解压过程，f表示解压名称)
3.修改profile
vi /etc/profile
添加内容
export JAVA_HOME=/opt/myprogram/jdk1.8.0_271 export PATH=$PATH:$JAVA_HOME/bin export CLASSPATH=.:$JAVA_HOME/lib
4.使profile生效
source /etc/profile
5.测试java -version
[root@VM-0-7-centos soft]# java -version java version "1.8.0_271" Java(TM) SE Runtime Environment (build 1.8.0_271-b09) Java HotSpot(TM) 64-Bit Server VM (build 25.271-b09, mixed mode)