centos 6 中安装jdk

1 jdk安装

文件自行官网下载
http://www.oracle.com/technetwork/java/javase/downloads/index.html
解压：tar xf jdk-8u121-linux-x64.tar.gz

把文件移到local目录：mv jdk1.8.0_121 /usr/local/

进入目录：cd /usr/local/jdk1.8.0_121

2 添加环境变量

vi /etc/profile

最后添加:

export JAVA_HOME=/usr/local/jdk1.8.0_121

export JAVA_BIN=$JAVA_HOME/bin

export PATH=$PATH:$JAVA_HOME/bin

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

3 检测jdk是否安装成功.

java -version