Centos7安装JDK

下载地址
https://www.oracle.com/java/technologies/downloads/

1）创建目录

mkdir -p /usr/local/java 

2）解压至指定目录

tar zxvf ../jdk-8u77-linux-x64.tar.gz -C /usr/local/java

3）配置环境变量

在文件最后添加如下配置：

JAVA_HOME=/usr/local/java/jdk1.8.0_161 
export CLASSPATH=$:CLASSPATH:$JAVA_HOME/lib/ 
export PATH=$PATH:$JAVA_HOME/bin 

4）重新加载配置文件

source /etc/profile

5）检查

java -version
java version “1.8.0_161” 
Java(TM) SE Runtime Environment (build 1.8.0_161-b12) 
Java HotSpot(TM) 64-Bit Server VM (build 25.161-b12, mixed mode)