解压文件包
tar -zxvf /root/jdk-8u144-linux-x64.tar.gz -C /root/java_tool/j2sdk1.8移动文件位置，重命名文件
mv java_tool/jdk8/jdk1.8.0_144/ java_tool/j2sdk1.8
[root@VM_0_10_centos java_tool]# tar -zxvf /root/jdk-8u144-linux-x64.tar.gz -C /root/java_tool/j2sdk1.8
[root@VM_0_10_centos java_tool]# mv java_tool/jdk8/jdk1.8.0_144/ java_tool/j2sdk1.8
3.编辑环境文件
vi /etc/profile
修改其中的jdk环境变量
jdk环境
4.更新profile文件
source /etc/profile
5.检查是否安装成功
jps
[root@VM_0_10_centos j2sdk1.8]# source /etc/profile
[root@VM_0_10_centos j2sdk1.8]# jps
3936 Jps
6.查看jdk安装路径
[root@VM_0_10_centos j2sdk1.8]# whereis java
java: /root/java_tool/j2sdk1.7.0/bin/java /root/java_tool/j2sdk1.8/bin/java
7.重启服务器
[root@VM_0_10_centos j2sdk1.8]# sudo shutdown -r now
8.检查jdk环境
[root@VM_0_10_centos ~]# java -version
java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)
