Centos 7安装JDK1.8

# 安装
yum install -y java-1.8.0-openjdk*

# 添加环境变量
vim /etc/profile

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.262.b10-0.el7_8.x86_64
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/jre/lib/rt.jar
export PATH=$PATH:$JAVA_HOME/bin

# 添加环境变量
source /etc/profile

# 验证安装
java -version