Java程式語言教學 https://programming.im.ncnu.edu.tw/J_index.html
Spring的二大的基本核心基礎,是DI與IoC:
https://medium.com/appxtech/java-spring%E7%99%BD%E8%A9%B1%E6%96%87-%E6%B7%BA%E8%AB%87%E5%AD%B8%E7%BF%92java-spring%E7%9A%84%E5%BF%83%E5%BE%97-a354d2baa80a
Java for beginners https://docs.microsoft.com/en-us/shows/java-for-beginners/