VMware Workstation 15 Player虚拟机CentOS-7-x86_64-DVD-2009 系统卸载openjdk 安装 jdk-8u321-linux-x64.tar.gz

1.1 查看现有版本查看系统中是否安装jdk：

java -version

看到当前系统包含 openjdk 1.8 .

1.2 查询所有与java相关的安装的rpm包

rpm -qa|grep java

1.3 删除除了noarch 结尾的所有文件

rpm -e --nodeps java-1.8.0-openjdk-headless-1.8.0.312.b07-1.el7_9.x86_64
rpm -e --nodeps java-1.8.0-openjdk-1.8.0.312.b07-1.el7_9.x86_64
rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.261-2.6.22.2.el7_8.x86_64
rpm -e --nodeps java-1.7.0-openjdk-1.7.0.261-2.6.22.2.el7_8.x86_64

1.4 检查剩余包

rpm -qa|grep jdk

1.5 oracle 官网下载 jdk 8

wget https://www.oracle.com/java/technologies/downloads/#license-lightbox

Java Downloads | Oracle

查看java下载包

 1.7 解压java

tar -zxvf jdk-8u321-linux-x64.tar.gz 

 1.8  配置java路径

vim /etc/profile

JAVA_HOME=/opt/jdk1.8.0_321
PATH=$PAHT:$JAVA_HOME/bin:$PATH
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME CLASSPATH PATH

source /etc/profile 

1.9 建立软连接 

ln -s -f /opt/soft/jdk1.8.0_321/bin/java
ln -s -f /opt/soft/jdk1.8.0_321/bin/javac

1.10 查验

java -version