Linux CentOS 7 下jdk安装，centosjdk

Linux CentOS 7 下jdk安装，centosjdk

1.在/usr/目录下创建java目录

[root@localhost ~]# mkdir /usr/java
[root@localhost ~]# cd /usr/java

2.复制jdk1.8到java目录下，解压到当前目录

[root@localhost java]# tar -zxvf jdk-8u131-linux-x64.tar.gz

3.设置环境变量

[root@localhost 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

让保存的环境变量生效

[root@localhost java]# source /etc/profile

验证jdk的配置是否生效

[root@localhost 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)