配置JDK

# tar zxf jdk-8u101-linux-x64.tar.gz -C /opt/
# cd /opt/;ln -s jdk1.8.0_101 jdk
# vim /etc/profile.d/java.sh
export JAVA_HOME=/opt/jdk
export JAVA_BIN=/opt/jdk/bin
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME JAVA_BIN PATH CLASSPATH
# source /etc/profile.d/java.sh
# java -version