安装JDK

登录官网进行版本的jdk下载，别想太多，肯定得创建个账号登录它才让你下载。。。。老实搞吧

https://download.oracle.com/otn/java/jdk/8u361-b09/0ae14417abb444ebb02b9815e2103550/jdk-8u361-linux-x64.tar.gz

建议现在本地下载后，通过lrzsz上传给服务器，服务器上使用wget方式下载特别慢

[root@app-bj-ali-ecs1 ~]# ls
jdk-8u361-linux-x64.tar.gz
[root@app-bj-ali-ecs1 ~]# tar -xzf jdk-8u361-linux-x64.tar.gz
[root@app-bj-ali-ecs1 ~]# ls
jdk1.8.0_361  jdk-8u361-linux-x64.tar.gz
[root@app-bj-ali-ecs1 ~]# mv jdk1.8.0_361/ /usr/local/
[root@app-bj-ali-ecs1 ~]# tail /etc/profile
[root@app-bj-ali-ecs1 ~]# tail /etc/profile
# 追加这三行
export JAVA_HOME=/usr/local/jdk1.8.0_361
export JRE_HOME=${JAVA_HOME}/jre
export PATH=$PATH:${JAVA_HOME}/bin:${JRE_HOME}/bin

[root@app-bj-ali-ecs1 ~]# java -version
java version "1.8.0_361"
Java(TM) SE Runtime Environment (build 1.8.0_361-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.361-b09, mixed mode)