wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie"  http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz
tar –zxvf jdk-8u131-linux-x64.tar.gz
mkdir -p /usr/java
mv jdk1.8.0_131 /usr/java/
vi /etc/profile
　　JAVA_HOME=/usr/java/jdk1.8.0_131
　　CLASSPATH=$CLASSPATH:$JAVA_HOME/lib
　　PATH=$PATH:$JAVA_HOME/bin
　　export PATH JAVA_HOME CLASSPATH
unlink /usr/bin/java
chmod +x /usr/java/jdk1.8.0_131/bin/*
source /etc/profile
java -version
javac -version