下载JDK的官方网址：http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

[root@localhost local]# mkdir -pv /usr/local/java            #新建java根目录

[root@localhost local]# cd /usr/local/src

[root@master src]# wget http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-i586.tar.gz?AuthParam=1492996665_22aa4ec92bc85d04a6451ada2203534d

[root@localhost src]# tar -zxf jdk-8u131-linux-i586.tar.gz\?AuthParam\=1492996665_22aa4ec92bc85d04a6451ada2203534d 

[root@localhost src]# mv jdk1.8.0_131 /usr/local/java/jdk1.8

[root@localhost java]# cd /usr/local/java/jdk1.8/             #验证是否成功

[root@localhost jdk1.8]# ls


vim /etc/profile                                              #配置环境变量

export JAVA_HOME=/usr/local/java/jdk1.8

export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$HOME/bin


[root@master ~]# source /etc/profile                          #重读配置文件，如果不行则重启

[root@localhost ~]# java -version                             #验证配置

java version "1.8.0_131"

Java(TM) SE Runtime Environment (build 1.8.0_131-b11)

Java HotSpot(TM) Client VM (build 25.131-b11, mixed mode)