openEuler Linux 下载安装 JDK 配置环境变量

openEuler Linux 下载安装 JDK 配置环境变量

:https://www.oracle.com/java/technologies/downloads/

下载常用软件

yum -y install wget tar vim

下载安装包

wget https://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.tar.gz

解压缩安装包到指定目录

tar -zxvf jdk-17_linux-x64_bin.tar.gz -C /opt

修改目录名

mv /opt/jdk-17.0.3.1/ /opt/jdk-17

检查软件是否可以

/opt/jdk-17/bin/java -version

配置环境变量

vim /etc/profile
vim /etc/bashrc

vim ~/.bash_profile
vim ~/.bashrc

以 /etc/profile 文件举例

vim /etc/profile

在文件末尾追加以下内容

jdk9及以上版本

export JAVA_HOME=/opt/jdk-17
export PATH=$PATH:$JAVA_HOME/bin

export CLASSPATH=.:%JAVA_HOME%/lib/jrt-fs.jar

jdk1.8

export JAVA_HOME=/opt/jdk-8
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:%JAVA_HOME%/lib/dt.jar:%JAVA_HOME%/lib/tools.jar

检查环境变量

printenv

结果如下：

SHELL=/bin/bash
HISTCONTROL=ignoredups
HISTSIZE=1000
HOSTNAME=openEuler
PWD=/root
LOGNAME=root
MOTD_SHOWN=pam
HOME=/root
LANG=zh_CN.UTF-8
SSH_CONNECTION=192.168.161.45 61798 192.168.161.131 22
TERM=xterm
USER=root
SHLVL=1
SSH_CLIENT=192.168.161.45 61798 22
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
MAIL=/var/spool/mail/root
SSH_TTY=/dev/pts/0
_=/usr/bin/printenv

配置文件临时生效

source /etc/profile

printenv

SHELL=/bin/bash
HISTCONTROL=ignoredups
HISTSIZE=1000
HOSTNAME=openEuler
JAVA_HOME=/opt/jdk-17
PWD=/root
LOGNAME=root
MOTD_SHOWN=pam
HOME=/root
LANG=zh_CN.UTF-8
SSH_CONNECTION=192.168.161.45 61798 192.168.161.131 22
TERM=xterm
USER=root
SHLVL=1
SSH_CLIENT=192.168.161.45 61798 22
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/opt/jdk-17/bin
MAIL=/var/spool/mail/root
SSH_TTY=/dev/pts/0
_=/usr/bin/printenv

检查java环境

java -version

javac -version