Problem Description:

An error was encountered while springboot was starting:

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-10-09 16:10:19.148 ERROR 3668 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

Failed to bind properties under '' to com.zaxxer.hikari.HikariDataSource:

    Property: driver-class-name
    Value: com.mysql.cj.jdbc.Driver
    Origin: "driverClassName" from property source "source"
    Reason: java.lang.RuntimeException: Failed to load driver class com.mysql.cj.jdbc.Driver in either of HikariConfig class loader or Thread context classloader

Action:

Update your application's configuration

Cause analysis:

When testing springboot, the default is H2 database, and I use mysql, so I need to specify it in application.properties

Solution:

Specify the following in application.properties

spring.datasource.driver-class-name=com.mysql.jdbc.Driver