Proceed as follows
① file -> new -> project
② Select Java Enterprise -> next 
③ create project from template -> java Web Mouldle -> next 
④ Fill in the project name -> next
⑤ After creation, you will see three parts
5.1 SSOServer is Dynamic Web Project Source code
5.2 External Libraries is the jar package imported from the outside of the project. Since the selected JDK is 1.8, all the jar packages used by JDK1.8 are imported into
5.3 Scratch as a temporary file editing environment for testing the code (currently I haven't used it myself)
⑥ After Run/Debug, you can access the default startup page of this dynamic Web project through the browser
⑦ The
7.1 out folder in the project code is a folder generated after running, and there is no folder after the project is created. Generate this folder
7.2 src is the source code
7.3 web is the project configuration file
After learning Java development, the ideal tool I have been using has not yet felt its power due to the lack of practice.
I have used Eclipse several times before, and I have not felt the difference between them due to the infrequent use of Eclipse.