Solve the warning prompt of MySQL mapping file

solve sql Warning tips for mapping files ：

There is a red explosion in the mapping file

Cause of occurrence ：
idea There is no connection with the database , Do not recognize the information of the table . But you must remember , He does not affect the execution of the procedure .
Solution ：
stay idea Middle configuration mysql Database connection .

Click on Idea On the right Database, Click on the expansion interface + choice Data Source, Re selection MySQL, Pictured ：

Fill in the basic information in the pop-up interface

But here we click TestConnection An error may be reported when Server returns invalid timezone. Go to ‘Advanced’ tab and set ‘serverTimezone’ property manually
Prompt us to set the time zone , Pictured ：

After modification, we are clicking TestConnection, You can't report an error .