After hard work, my own IDEA started out as a community version. It was difficult to deploy tomcat. In the end, it was changed to an enterprise version. I suggest you not to use the community version. There are too few functions!
Next, because the Biset template is downloaded from the Internet, it is a MyEclipse project, but are you using IDEA now? Let’s go to the topic
1. Download IDEA, go to the official website to download (not repeat)
2. Download tomcat, go to the official website to download (not important as well, downloading, installation and decompression is equivalent to the installation is complete, not to say more)
3. Then click on the picture Step by step.
(1) 
(2) Select the second item, and then select eclipse, next, select your project, and continue to the next step to completion.
4. Start configuration, click File—> 
Lib file in Project Structure project,
select wed, and then select your own project, ok
Change the webResource in the figure below, double-click and change it to the webroot path, ok
apply and then ok.
6. Next, configure tomcat
Name, just name one by yourself, otherwise it is Unnameed
here to check it, otherwise the browser
application will not appear when running .