root 进入后，

ls -lart

看到 .bash_profile文件

vim .bash_profile 打开文件

输入如下:

-------------------------------------------------------

.bash_profile

Get the aliases and functions

if [ -f ~/.bashrc ]; then

        . ~/.bashrc

fi

User specific environment and startup programs

PATH=$PATH:$HOME/bin

Java Environment

export JAVA_HOME=/usr/local/jdk1.8.0_333

export JRE_HOME=$JAVA_HOME/jre

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

export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:.



export PATH

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结束后，执行如下刷新配置

source .bash_profile

查看下时候生效

java -version

[root@houxiurong ~]# java -version

java version "1.8.0_333"

Java(TM) SE Runtime Environment (build 1.8.0_333-b02)

Java HotSpot(TM) 64-Bit Server VM (build 25.333-b02, mixed mode)

[root@houxiurong ~]#