IDEA的默认设置是，当需要导包的时候会有个提示，这时按Alt ＋ Enter可以手动导入包。这些年一直这么用，也习惯了。但是用了一些其他的IDE开发工具边写代码边自动导入，用了以后挺爽的，所以我就想IDEA能不能也这样呢？
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https://blog.csdn.net/hxpjava1/article/details/78135934
