1.idea 最近打开的文件个数
File->Settings->Editor->General->Editor Tabs->Tab Closing Policy->Tab limit
参考：https://www.cnblogs.com/yzhch/archive/2017/04/19/6734209.html
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
2.idea Serializable
File->Setting>Editor>Inspection>Java>Serialization issue->Serializable class without 'serialVersion' 打勾
参考：https://blog.csdn.net/humingtao1108/article/details/78922853
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
3.idea 转换 maven
工程右键->Add Framework Support->Maven
参考：https://www.cnblogs.com/hfultrastrong/p/8584312.html
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
4.idea unregistered vcs root detected idea
File->Settings->Version Control 选中unregister的名称，点右上角+号
参考：https://blog.csdn.net/sanyuedexuanlv/article/details/78509721
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
5.idea 右键->Diagrams菜单没有
File->Settings->Plugins搜uml => UML Support
参考：
IDEA UML类图插件 https://www.cnblogs.com/winner-0715/p/6100983.html
使用IntelliJ IDEA查看类的继承关系图形 https://blog.csdn.net/a236209186/article/details/74529698
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
6.idea 重复代码波浪线
File->Settings->Inspections->General->Duplicated Code
参考：https://blog.csdn.net/qq_34120041/article/details/62887647
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
7.idea js验证
File>Settings>Lauguages & Frameworks>JavaScript
javascript languages version修改为ECMAScript 6
参考：https://blog.csdn.net/qq_33863843/article/details/73275739
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
8.错误: 找不到或无法加载主类 @{argLine}
File->Settings->Build->Maven->Running Tests: argLines勾去掉
参考：https://blog.csdn.net/q514004204/article/details/79059522
--------------------------------------------------------------------------------------------------------------------------------------------------------------------
9.IDEA Ctrl+Alt+O import *
File->Settings->Editor>Code Style>Java>Scheme Default>Imports
将Class count to use import with "*"改为99（导入同一个包的类超过这个数值自动变为 * ）
将Names count to use static import with "*"改为99（同上，但这是静态导入的）
将Package to Use import with "*"删掉默认的这两个包（不管使用多少个类，只要在这个列表里都会变为 * ）
参考：https://www.cnblogs.com/EasonJim/p/7908482.html
-------------------------------------------------------------------------------------------------------------------------------------------------
10.IDEA git fetch
右击项目->Git->Repository->Fetch
参考：https://www.cnblogs.com/xiaozhijing/p/9177347.html
-------------------------------------------------------------------------------------------------------------------------------------------------
11.IDEA 修改高亮颜色
Settings->Editor->Color Scheme->General里的Code->Identifier under caret修改Background颜色
参考：https://www.cnblogs.com/anye-15068156823/p/8508531.html
==============================================================================================
IDEA 好用的插件 https://www.cnblogs.com/foreverYoungCoder/p/7686562.html
如何使用IntelliJ IDEA的Favorites来管理项目中的常用代码 https://www.cnblogs.com/deng-cc/p/6530279.html
从Eclipse到IDEA，金字塔到太空堡垒 https://my.oschina.net/lizaizhong/blog/2051414