脚本自动安装JDK,支持威联通，群晖

github:

https://github.com/rednoah/java-installer

linux通用脚本：

# Download the latest JDK into the current directory & link java to /usr/local/bin
curl -O https://raw.githubusercontent.com/rednoah/java-installer/latest/release/get-java.sh
sh get-java.sh install