CentOS - JDK安装

Posted 2020-11-21 ealenxie

1.检查一下系统中的jdk版本
java -version

2.检测jdk安装包
rpm -qa | grep java

3.如果发现有openjdk,则卸载openjdk
yum remove *openjdk*

4.到官网http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html下载新的jdk

5 . 上传下载的jdk包

6 . 解压 tar -zxvf jdk-8u171-linux-x64.tar.gz -C /usr/local

7. 配置环境变量
vim /etc/profile
添加
export JAVA_HOME=/usr/local/jdk1.8.0_171
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

8.让profile文件重新生效
source /etc/profile

9.检查新安装的jdk
java -version
javac