CentOS7安装JDK1.8

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1.下载安装jdk1.8

官网下载地址：jdk下载

2.解压jdk

[root@localhost /]# tar -zxvf jdk-8u144-linux-x64.tar.gz -C /usr/local/java/

3.配置环境变量

[root@localhost /]# vim /etc/profile #set environment JRE_HOME=$JAVA_HOME/jre CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin export JAVA_HOME JRE_HOME CLASS_PATH PATH

4.使环境变量生效

[root@localhost /]# source /etc/profile

5.查看jdk是否安装成功

[root@localhost /]# java -version

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