Failed to configure a DataSource: ‘url‘ attribute is not specified

Failed to configure a DataSource: ‘url‘ attribute is not specified

解决办法
看下自己的驱动包类是不是com.mysql.cj.jdbc.Driver

之前写的是spring.datasource.driver-class-name=com.mysql.jdbc.Driver
因为之前的SpringBoot版本较低，所以写这个没有问题

错误提示

Failed to configure a DataSource: ‘url’ attribute is not specified

Failed to determine a suitable driver class