java IDEA manually replace the update jar package

1. Open the project

2. Click [File] at the top left of the home page

3. Select [Project Structure] in the drop-down bar, Chinese name: project structure

Select and click [Modules] on the left side of the [Project Structure] pop-up window

Select and click [Dependencies] at the top of the center

Select the jar package to delete

Select the "+" symbol on the right, find the path of the jar package, and add it

 

After the addition is successful, the added jar package will be found in the [Export] area.
How does IntelliJ IDEA import the jar package?