Centos 安装JDK环境

Java SE 8 官方下载 ( 需账号登录 )

https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

8u241.png

[root@localhost opt]# ll -h
-rw-r--r-- 1 root root 186M Feb  4 16:34 jdk-8u241-linux-x64.tar.gz
[root@localhost opt]# tar xf jdk-8u241-linux-x64.tar.gz
[root@localhost opt]# ls
jdk1.8.0_241  jdk-8u241-linux-x64.tar.gz
[root@localhost opt]# mv jdk1.8.0_241/ /usr/local/java

以下内容全部粘贴到Xshell

cat >>/etc/profile<<EOF
# Configure Java 
export JAVA_HOME=/usr/local/java
export JRE_HOME=\$JAVA_HOME/jre
export CLASSPATH=.:\$JAVA_HOME/lib:\$JRE_HOME/lib
export PATH=\$JAVA_HOME/bin:\$PATH
EOF

刷新环境变量, 查看Java版本

[root@localhost java]# source /etc/profile && java -version
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)