在线安装：
# 更新包列表
sudo apt update
# 安装Java 8或11
sudo apt install openjdk-11-jdk
sudo apt install openjdk-8-jdk
# 验证安装
java -version
离线安装：
# 下载离线安装包: 离线包可以从oracle官网下载，也可以从国内的镜像站下载开源版本
wget https://repo.huaweicloud.com/java/jdk/8u202-b08/jdk-8u202-linux-x64.tar.gz
wget https://mirrors.tuna.tsinghua.edu.cn/Adoptium/8/jdk/x64/linux/OpenJDK8U-jdk_x64_linux_hotspot_8u472b08.tar.gz
wget https://mirrors.tuna.tsinghua.edu.cn/Adoptium/11/jdk/x64/linux/OpenJDK11U-jdk_x64_linux_hotspot_11.0.29_7.tar.gz
wget https://mirrors.tuna.tsinghua.edu.cn/Adoptium/17/jdk/x64/linux/OpenJDK17U-jdk_x64_linux_hotspot_17.0.18_8.tar.gz
wget https://mirrors.tuna.tsinghua.edu.cn/Adoptium/20/jdk/x64/linux/OpenJDK20U-jdk_x64_linux_hotspot_20.0.2_9.tar.gz
wget https://mirrors.tuna.tsinghua.edu.cn/Adoptium/21/jdk/x64/linux/OpenJDK21U-jdk_x64_linux_hotspot_21.0.10_7.tar.gz
# 解压
tar -zxvf OpenJDK11U-jdk_x64_linux_hotspot_11.0.29_7.tar.gz
# 配置环境变量
vim ~/.bashrc
export JAVA_HOME=/home/jdk/apps/OpenJDK11U-jdk_x64_linux_hotspot_11.0.29_7
export PATH=$JAVA_HOME:$PATH
#环境变量生效
source ~/.bashrc
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