linux安装java环境

https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

安装

1. 创建目录

   mkdir /usr/java

2. 上传jdk到服务器，解压jdk到目录

   tar xf jdk-8u212-linux-x64.tar.gz -C /usr/java/

3. 编辑配置文件，配置环境变量

   vim /etc/profile
   #java
   export JAVA_HOME=/usr/java/jdk1.8.0_212
   export PATH=$JAVA_HOME/bin:$PATH
   export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

4. 使配置生效

   source /etc/profile

验证

[root@jenkins ~]# java -version

java version "1.8.0_212"
Java(TM) SE Runtime Environment (build 1.8.0_212-b10)
Java HotSpot(TM) 64-Bit Server VM (build 25.212-b10, mixed mode)

原文：https://blog.51cto.com/jinkcloud/2407381