centos8安装jdk1.8

1、下载jdk

[root@localhost opt]# wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie"  http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz
--2022-05-10 18:49:45--  http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz
正在解析主机 download.oracle.com (download.oracle.com)... 104.75.164.29
正在连接 download.oracle.com (download.oracle.com)|104.75.164.29|:80... 已连接。
已发出 HTTP 请求，正在等待回应... 302 Moved Temporarily
位置：https://edelivery.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz [跟随至新的 URL]
--2022-05-10 18:49:46--  https://edelivery.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz
正在解析主机 edelivery.oracle.com (edelivery.oracle.com)... 23.76.215.229, 2600:140e:6:9bf::366
正在连接 edelivery.oracle.com (edelivery.oracle.com)|23.76.215.229|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 302 Moved Temporarily
位置：https://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz?AuthParam=1652322725_939884e9652b5e4bb2fee64c083293e7 [跟随至新的 URL]
--2022-05-10 18:49:48--  https://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz?AuthParam=1652322725_939884e9652b5e4bb2fee64c083293e7
正在连接 download.oracle.com (download.oracle.com)|104.75.164.29|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：185540433 (177M) [application/x-gzip]
正在保存至: “jdk-8u131-linux-x64.tar.gz”

jdk-8u131-linux-x 100%[=============>] 176.94M  4.51MB/s  用时 55s     

2022-05-10 18:50:43 (3.25 MB/s) - 已保存 “jdk-8u131-linux-x64.tar.gz” [185540433/185540433])

2、解压缩jdk

[root@localhost opt]# tar -xvf jdk-8u131-linux-x64.tar.gz
[root@localhost opt]# ls -lF
总用量 181192
drwxr-xr-x. 8   10  143       255 3月  15 2017 jdk1.8.0_131/
-rw-r--r--. 1 root root 185540433 3月  16 2017 jdk-8u131-linux-x64.tar.gz

3、配置环境变量

3.1在profile最后添加**

[root@localhost jdk1.8.0_131]# vi /etc/profile
export JAVA_HOME=/opt/jdk1.8.0_131
export PATH=$PATH:$JAVA_HOME/bin

3.2生效

[root@localhost jdk1.8.0_131]# source /etc/profile

3.3查看是否生效

[root@localhost jdk1.8.0_131]# java -version
java version "1.8.0_131"
Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)