Centos7 安装JDK

tar -zxvf jdk-7u79-linux-x64.tar.gz -C /usr/local/jdks/
cd /usr/local/jdks/

vim /etc/profile.d/java.sh

#!/bin/bash
#
export JAVA_HOME=/usr/local/jdks/jdk1.8.0_211
export CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
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source /etc/profile  #执行该命令
java -version  #查看java是否安装成功