(1)部署JDK
yum install wget -y
# 安装jdk1.8
mkdir /usr/local/software/jdk -p
cd /usr/local/software/jdk
wget https://dsideal.obs.cn-north-1.myhuaweicloud.com/HuangHai/jdk-8u241-linux-x64.rpm

# 如果需要下载更新版本的jdk,可以直接在这里下载，然后上传到华为云上
# https://pkgs.org/download/jdk
# wget https://forensics.cert.org/centos/cert/6/x86_64//jdk-8u221-linux-x64.rpm

rpm -ivh jdk-8u241-linux-x64.rpm

mv /usr/java/jdk1.8.0_241-amd64 /usr/java/jdk

# /etc/profile
echo "export JAVA_HOME=/usr/java/jdk" >> /etc/profile
echo "export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH" >> /etc/profile
echo "export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib" >> /etc/profile
source /etc/profile

# java -version 检查是否安装成功。
java -version