cd /usr/local
wget https://yoondada.oss-cn-shenzhen.aliyuncs.com/software/CentOS7/jdk-8u381-linux-x64.tar.gz
tar -zxvf jdk-8u381-linux-x64.tar.gz
mv jdk-8u381-linux-x64 jdk
vim /etc/profile
JAVA_HOME=/usr/local/jdk
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH
:wq
source /etc/profile
java
javac
java -version
