1.在/usr/目錄下創建java目錄

[[email protected] ~]# mkdir /usr/java
[[email protected] ~]# cd /usr/java

2.復制jdk1.8到java目錄下，解壓到當前目錄

[[email protected] java]# tar -zxvf jdk-8u131-linux-x64.tar.gz

3.設置環境變量

[[email protected] java]# vi /etc/profile

i添加如下信息

set java environment
JAVA_HOME=/usr/java/jdk1.8.0_131
JRE_HOME=/usr/java/jdk1.8.0_131/jre
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH

:wq保存退出

讓保存的環境變量生效

[[email protected] java]# source /etc/profile

驗證jdk的配置是否生效

[[email protected] java]# java -version
openjdk version "1.8.0_102"
OpenJDK Runtime Environment (build 1.8.0_102-b14)
OpenJDK 64-Bit Server VM (build 25.102-b14, mixed mode)

Linux CentOS 7 下jdk安裝