1. 下载Interllij IDEA
下载网址：https://www.jetbrains.com/idea/download/#section=windows
选择自己想用的版本，我是进行WEB开发，选的Ultimate，之后进行安装即可；
安装之后需要进行激活，注册码：K03CHKJCFT-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-IJBDUuZMqhMJZfuM8Pgz1WXDRP3k9sKMJXuGdnbwoYDN4Y2G5Xmpw05GZUeESnh2/wzVxTHF4+PQ5ewk+J66F15b50VHSNxFI9XKWatoDfBc9EA1CddWqAU5CaipdMkSHoUDbT69PPGU4Vsfo1HTFv50tQ7RFVYMDbmVhw6mUbTFMvGiu5CZTuEVkmJ+1KpfuyQZvXjS1hXhfbK/xmpMG2/xRmK9lxW9PafZU1dWxqjYU8QBlUYgjdDsDS2apSTE+xFF6y3ZKK/YThpC7IYt5HR5Cc3VGjdb/H7jEAkH2/Uz0PrixPc3Bk5tU01rhxI4Z5VbmmWzGAhWWBtQEqU17A==-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
2. 导入已存在的项目；
1）如下图所示：
2）找打工程所在地进行导入；
3）按照其默认的选项进行next直至完成
3. 上述导入操作完成之后，进行项目的相关配置
1） 找到下图所示的图标并点击，或者ctrl+alt+shift+s
2）打开之后选择Project Setting -> Facets,然后点击右下角的Create Artifact，之后在点击apply，进行项目的手工导入。
3) 配置tomcat ,点击Add Configurations,然后点击窗口右上角的"+",选择Tomcat Server，然后选择local，进行配置;点击Configurations选择本地安装的tomcat目录，并点击下面的"+"导入tomcat依赖的库。
4） 点击Deployment,然后点击"+", 之后点击apply
5) 之后再导入项目依赖的jar包，ctrl+alt+shift+s 打开Project Setting -> Modules -> Dependencies,之后点击"+"进行jar包的导入
6） 这个时候点击运行项目就可以跑起来了
7） 设置IntelliJ IDEA默认选择的浏览器，其默认设置的是ie浏览器，我因为不喜欢ie浏览器，所以设置的为谷歌浏览器。点击File -> Settting -> Tools -> Web Browsers, 然后选择勾选的浏览器，并配置默认启动的浏览器配置
原文地址：https://www.cnblogs.com/hughwen/p/10090539.html