# Linux环境安装-JDK 1.8

**Published by:** [Yeanuo](https://paragraph.com/@yeanuo/)
**Published on:** 2023-10-26
**URL:** https://paragraph.com/@yeanuo/linux-jdk-1-8

## Content

本文记录在CentOS中安装JDK 1.8 的详细步骤操作环境Linux版本：CentOS Linux release 7.9.2009安装的JDK版本：Java SE Development Kit 8u391 x64 Compressed Archive安装路径：/usr/local/java/检测旧版本JDK先检测是否已安装JDK java -version如已安装需先删除其它版本检测是否有安装JDK下载JDK进入到安装目录 cd /usr/local/java/下载地址 https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html选择版本 Linux x64 Compressed Archive如果提示登录可以使用如下账号（网络账号）83926039@qq.comOracle0.执行命令下载 wget https://download.oracle.com/otn/java/jdk/8u391-b13/b291ca3e0c8548b5a51d5a5f50063037/jdk-8u391-linux-x64.tar.gz?AuthParam=1698287867_0dfcdff0c74894ae1e2021213715e171 地址为带时间戳的时效地址，可能过期，需要去页面点击下载按钮重新生成移动并重命名安装包，如果安装包名称不是规范的 mv jdk-8u391-linux-x64.tar.gz?AuthParam=1698287867_0dfcdff0c74894ae1e2021213715e171 /usr/local/java/jdk-8u391-linux-x64.tar.gz安装JDK解压 tar -xzf jdk-8u391-linux-x64.tar.gz解压后的文件配置环境变量 vi /etc/profile 在文件末尾增加配置# set java environment JAVA_HOME=/usr/local/java/jdk1.8.0_391 JRE_HOME=/usr/local/java/jdk1.8.0_391 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 生效环境变量 source /etc/profile在文件末尾配置环境变量验证安装java -version安装成功

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