Spring Boot无法从application.properties加载用户名

Question

I'm developing a simple web application with spring boot. In the first step, I implemented everything about the page itself and a simple login. Additionally, I implemented a database access using mysql and hibernate. My database runs on a local easyphp devserver.

In the first step, everything worked fine. However, after a reset of the database and recreating the user with the same credentials, Hibernate is not able to get a connection:

2018-02-09 21:17:11.487 ERROR 9592 --- [  restartedMain] o.a.tomcat.jdbc.pool.ConnectionPool      : Unable to create initial connections of pool.
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Access denied for user ''@'localhost' to database 'db'

As I can understand, no username was configured. But in my application.properties , a username is set:

spring.datasource.url=jdbc:mysql://localhost:3306/db?userSSL=false
spring.datasource.username=user
spring.datasource.password=

The exception occurres on startup, so it has to be the configuration. At the database, the user 'user' has all priviliges at the database 'db' , but no one on others.

Answer 1

The data source URL might be causing the issue. Is that a typo? Can you check by resetting it to the following? It has to be "useSSL" instead of "userSSL"

spring.datasource.url=jdbc:mysql://localhost:3306/db?useSSL=false
spring.datasource.username=user
spring.datasource.password=

If the above does not work, your problem might be related to permissions for the user. A question posted here relates to yours (although it is in PHP).

Hopefully this resolves it, let us know.

Answer 2

Ok, found the solution by myself. The real username contained a '_' like 'user_name'. Somehow this character was the problem why the username was not read.

Edit: Worked a few times, but the problem still exists...