1.install.sh
tar -zxvf jdk8.tar.gz
mv jdk8u201 jdk8
#查看是否系统自带openjdk
rpm -qa|grep java
#卸载自带openjdk
rpm -e tadata-java-2022a-1.el8.noarch javapackages-filesystem-5.3.0-1.module+el8+2447+6f56d9a6.noarch java-1.8.0-openjdk-headless-1.8.0.322.b06-11.el8.x86_64 --nodeps
#添加全局path
cat <<EOF >> /etc/profile
JAVA_HOME=/opt/app/middles/openjdk-1.8.0
CLASSPATH=.:\$JAVA_HOME/lib.tools.jar
PATH=\$JAVA_HOME/bin:\$PATH
export JAVA_HOME CLASSPATH PATH
EOF
#刷新
source /etc/profile