1、官方JDK下载地址：http://download.oracle.com/otn-pub/java/jdk/8u92-b14/jdk-8u92-linux-x64.rpm
2、Linux下执行：wget -c -P /root/Downloads --no-check-certificate --no-cookie --header "Cookie: s_nr=1420682671945; s_cc=true; oraclelicense=accept-securebackup-cookie; gpw_e24=http%3A%2F%2Fwww.oracle.com%2Ftechnetwork%2Fjava%2Fjavase%2Fdownloads%2Fjdk7-downloads-1880260.html;s_sq=%5B%5BB%5D%5D" http://download.oracle.com/otn-pub/java/jdk/8u92-b14/jdk-8u92-linux-x64.rpm
3、建立目录：#mkdir /usr/java
4、复制下载的jdk-8u92-linux-x64.rpm到/usr/java目录中
#cp /root/Downloads/jdk-8u92-linux-x64.rpm /usr/java
5、添加可执行权限，并安装
# cd /usr/java/
# chmod +x jdk-8u92-linux-x64.rpm
#rpm -ivh jdk-8u92-linux-x64.rpm
6、配置环境变量
进入编辑profile文件
#vim /etc/profile
在profile文件最后追加入如下内容：
export JAVA_HOME=/usr/java/jdk1.8.0_91
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin保存并退出.
7、最后执行如下
#source /etc/profile