SpringBoot循环connection SQLException, url: jdbc:mysql://localhost:3306/mysq?serverTimezone=UTC, error

I encountered this problem in the project today. The console repeatedly printed this paragraph

connection SQLException, url: jdbc:mysql://localhost:3306/mysq?serverTimezone=UTC, error

I switched the database version, but it still doesn't work. Then I saw this
Access denied for user'root'@'localhost' (using password: YES) and it became clear. I could
not log in, and the account password was wrong.
But I looked at my application.properties and
it seemed correct. Then I I think
there is something wrong with the password behind the password. Why are there flashing light blocks? Is it possible that spaces are also included in the calculation?
After deleting

grass…