CentOS7安装部署Java11

CentOS7安装部署JDK11

一、前言

• Linux 发行版：CentOS-7-x86_64-DVD-1804.iso
• JDK 版本：Java SE Development Kit 11.0.19

Java Archive：https://www.oracle.com/java/technologies/downloads/archive/

jdk11-archive-downloads：https://www.oracle.com/java/technologies/javase/jdk11-archive-downloads.html

[CentOS] JDK安装部署：https://blog.csdn.net/u011424614/article/details/94610567

Java环境变量配置过程：https://blog.csdn.net/u011424614/article/details/103530318

CentOS基础操作命令：https://blog.csdn.net/u011424614/article/details/94555916

二、正文

1.卸载 Open JDK

• 查询原系统安装的 JDK

java -version

yum list installed | grep java

• 根据原系统安装的 JDK 进行卸载命令修改

#--卸载openjdk 1.7
yum -y remove java-1.7.0-openjdk.x86_64
yum -y remove java-1.7.0-openjdk-headless.x86_64

#--卸载openjdk 1.8
yum -y remove java-1.8.0-openjdk.x86_64
yum -y remove java-1.8.0-openjdk-headless.x86_64

2.安装JDK11

• 下载 JDK 压缩包，上传到服务器
• 本文下载的版本：jdk-11.0.19_linux-x64_bin.tar.gz

jdk11-archive-downloads：https://www.oracle.com/java/technologies/javase/jdk11-archive-downloads.html

• 创建安装目录，并解压

mkdir /opt/java
cd /opt/java
tar -zxvf jdk-11.0.19_linux-x64_bin.tar.gz

• 编辑 /etc/profile

vim /etc/profile

• 写入环境配置

export JAVA_HOME=/opt/java/jdk-11.0.19
export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=$PATH:${JAVA_HOME}/bin

• 更改立即生效

source /etc/profile

• 查看 JDK 版本

java -version