centOS7.6下通过脚本自动安装JDK8

安装包

官网下载JDK1.8安装包，如：jdk-8u301-linux-x64.tar.gz

执行脚本

创建脚本，如：install-jdk.sh
添加如下命令：

#!/bin/bash
echo "deploy jdk1.8 to centos7.6"
echo "解压缩文件"
tar -zxvf jdk-8u301-linux-x64.tar.gz
echo "jdk文件位置：/usr/local/jdk1.8"
sudo mv jdk1.8.0_301  /usr/local/jdk1.8
echo "配置环境变量"
if [ -f /etc/profile ]
then
  if [ -w /etc/profile ]
    then
      echo "#jdk1.8 config start" >> /etc/profile
      export JAVA_HOME=/usr/local/jdk1.8
      export JRE_HOME=$JAVA_HOME/jre
      echo "export JAVA_HOME=/usr/local/jdk1.8" >> /etc/profile
      echo "export JRE_HOME=$JAVA_HOME/jre" >> /etc/profile
      echo "export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib" >> /etc/profile
      echo "export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin" >> /etc/profile
      echo "#jdk1.8 config end" >> /etc/profile
      echo "使环境变量配置生效"
      source /etc/profile
      java -version
  elsevi 
      echo "profile 无写入权限"
  fi
else
      echo "profile is not exist"
fi

执行安装

将JDK安装包和执行脚本放在同一目录下
给执行脚本赋予可执行权限后执行即可

chmod +x install-jdk.sh
./install-jdk.sh