jdk 安装
- 官网地址下载jdk http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html (例如:jdk-8u221-linux-x64.tar.gz)
- 解压文件 tar -xvf jdk-8u221-linux-x64.tar.gz
- 配置环境变量文件 sudo vim /etc/profile
export JAVA_HOME=/var/local/jdk1.8.0_221
export JRE_HOME=/var/local/jdk1.8.0_221/jre
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
export CLASSPATH=$CLASSPATH:.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
- 通过命令 source /etc/profile 使当前配置生效
- 测试 java -version