Centos7安装Java

1.创建目录

mkdir -p /usr/local/java1.8
cd /usr/local/java1.

2.下载Java jdk

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html   # 下载
tar -zvxf jdk-8u241-linux-x64.tar.gz    # 解压

3.配置环境变量

vim /etc/profile
export JAVA_HOME=/usr/local/java1.8/jdk1.8.0_241
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

source /etc/profile

4.添加软连接

ln -s /usr/local/java1.8/jdk1.8.0_241/bin/java /usr/bin/java

5.查看版本

java -version