首先去到Oracle官网
https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html
下载Linux64位版
2.下载命令
wget https://download.oracle.com/otn/java/jdk/8u261-b12/a4634525489241b9a9e1aa73d9e118e6/jdk-8u261-linux-x64.tar.gz?AuthParam=1602232206_52a7a37504398ac58b7b5c07fec988a9
1)下载以后通过命令检查安装包大小是否符合
ls -lht
3.安装
1)创建安装目录
mkdir /usr/local/java/
2)解压至安装目录
tar -zxvf jdk-8u261-linux-x64.tar.gz -C /usr/local/java/
4.设置环境变量
- 打开文件
vi /etc/profile
2 )在末尾添加
export JAVA_HOME=/usr/local/java/jdk1.8.0_261
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.: ${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
esc---->:wq保存
- 使环境变量生效
source /etc/profile
- 添加软链接
ln -s /usr/local/java/jdk1.8.0_261/bin/java /usr/bin/java
- 检查
java -version