使用yum安裝JDK

yum -y install java-1.8.0-openjdk java-1.8.0-openjdk-devel

設定環境變數

cat > /etc/profile.d/java8.sh <<EOF
export JAVA_HOME=$(dirname $(dirname $(readlink $(readlink $(which javac)))))
export PATH=\$PATH:\$JAVA_HOME/bin
export CLASSPATH=.:\$JAVA_HOME/jre/lib:\$JAVA_HOME/lib:\$JAVA_HOME/lib/tools.jar
EOF