Linux download/configure java environment

1. Check the linux system and select the corresponding installation package

 Select the jdk version to download according to the above figure

# 具体版本下载地址
wget https://repo.huaweicloud.com/java/jdk/8u201-b09/jdk-8u201-linux-x64.tar.gz

# 官网获取地址
https://www.oracle.com/java/technologies/downloads/#java8

# 解压后的文件夹为 jdk1.8.0_201
tar -zxf jdk-8u201-linux-x64.tar.gz

# 将 jdk 放在 /usr/local/java 
mv jdk1.8.0_201/ /usr/local/java 

2. Add environment variables

# 在如下配置文件中添加环境变量
vim /etc/profile

# 环境变量
export JAVA_HOME=/usr/local/java
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH


# 重新加载环境变量
source /etc/profile

3. Verify that the installation is successful

# 查看jdk版本
java -version