Complete newbie in web development

I have a couple questions.
I have a project (a kind of tutorial) developed with Eclipse. I didn't knew how to open the project with Eclipse, so I tried Intellij.

I opened Idea, New Project, Import project from external model, Eclipse, Select projectjs directory. I added all the library for the frameworks used in the webapp, I selected Tomcat and probably, I need to make the connection with the database (I have mysql)

Tools, Data Sources, JDBC Source Proprieties (add mysql connector), I know the user and the password, but I don't know what is the Database URL.

How can I find this information?

P.S. Complete newbie in web development, don''t kill me, I just want to see how the app is looking