JDK1.8环境部署安装脚本

采用rpm包安装万能的JDK1.8环境：

提前备好rpm包在/usr/local下（tip: JDK11的就不需要配置环境变量了）

#下载rpm包：wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" https://download.oracle.com/otn-pub/java/jdk/8u201-b09/42970487e3af4f5aa5bca3f542482c60/jdk-8u241-linux-x64.rpm
cd /usr/local/
rpm -ivh jdk-8u241-linux-x64.rpm 
cat >> /etc/profile << EOF
export JAVA_HOME=/usr/java/jdk1.8.0_241
export JRE_HOME=/usr/java/jdk1.8.0_241/jre
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib:$JRE_HOME/lib
EOF