CentOS7 安装配置jdk

1.解压上传的jdk压缩包

[root@ansible ~]# tar -zxvf jdk-8u241-linux-x64.tar.gz

2.移动解压后的目录到指定位置

[root@ansible ~]# mv jdk1.8.0_241/ /usr/local/jdk

3.配置环境变量

[root@ansible ~]# vim /etc/profile

export JAVA_HOME=/usr/local/jdk
export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=$PATH:${JAVA_HOME}/bin

4.使配置文件生效

[root@ansible ~]# source /etc/profile

5.检查配置是否成功

[root@ansible ~]# java -version

java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 1.8.0_241-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode)