JDK 版本： jdk-8u271-linux-x64.rpm
1. rpm -ivh jdk-8u271-linux-x64.rpm
2. 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)
3. 配置环境变量
默认路径：/usr/java/jdk1.8.0_271-amd64
4. vi /etc/profile
JAVA_HOME=/usr/java/jdk1.8.0_271-amd64
PATH=$PATH:$JAVA_HOME/bin:
5. source /etc/profile
6. echo $JAVA_HOME
/usr/java/jdk1.8.0_271-amd64
