java.sql.SQLException: url not set； 无法进行解决

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [com/roncoo/spring/boot/autoconfigure/druid/DruidAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.alibaba.druid.pool.DruidDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.RuntimeException: java.sql.SQLException: url not set
错误原因，真的找不到哪里错误了。