1. IDEA 解决代码提示功能消失. Ans: https://blog.csdn.net/Hmily_hui/article/details/78213037
  2. IntelliJ 创建main函数快捷: https://blog.csdn.net/liuchaoxuan/article/details/79113164
  3. Intellij IDEA 2018 添加 main syso 自动补全 : https://blog.csdn.net/aaaadddd250/article/details/86304276
  4. ideal 文件头注释模板 : https://jingyan.baidu.com/article/c1a3101e7e1797de656deb80.html
  5. IDEA自动生成Junit测试类 : https://www.oschina.net/question/100896_82967
  6. IDEA生成增强for循环 ：https://blog.csdn.net/hdchenyue/article/details/52300473