Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class
Action:
Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
Disconnected from the target VM, address: '127.0.0.1:55235', transport: 'socket'
Process finished with exit code 1
cao！！！！问题解决了，是我给这个写成了生产环境
改成dev就行了
spring: profiles: active: dev