cetos安装java

http://hermosa-young.iteye.com/blog/1798026

java -version
rpm -qa|grep java
mkdir /usr/java
cd /usr/java
wget http://download.oracle.com/otn-pub/java/jdk/8u31-b13/jdk-8u31-linux-x64.rpm?AuthParam=1425101525_1f256b1767587759bc614151b2b0fd76
rpm -ivh jdk-8u31-linux-x64.rpm
vi /etc/profile

export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL

export JAVA_HOME=/usr/java/jdk1.8.0_31
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

source /etc/profile
java -version