准备环境
- 操作系统：CentOS-7.5-x64
- JDK1.8：jdk-8u181-linux-x64.rpm
安装软件
下载rpm安装包：
[root@localhost ~]# wget http://download.oracle.com/otn-pub/java/jdk/8u181-b13/96a7b8442fe848ef90c96a2fad6ed6d1/jdk-8u181-linux-x64.rpm
[root@localhost ~]# rpm -ivh /usr/local/src/jdk-8u181-linux-x64.rpm
检查安装版本：
[root@localhost ~]# java -version
java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)