CentOS 7 安装Java JDK

JDK 1.8 下载地址：jdk-8u111-linux-x64.tar.gz

1、解压jdk文件
tar -zxvf /home/dunhanson/upload/jdk-8u111-linux-x64.tar.gz -C /usr/local/
mv jdk1.8.0_111/ jdk

2、添加环境变量
vi /etc/profile
export JAVA_HOME=/usr/local/jdk
export PATH=$PATH:$JAVA_HOME/bin

3、使环境变量立即生效
source /etc/profile

4、检查是否安装成功
java -version
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)