2 回答添加注解后Application run failed

1 回答请教各位，3.1节项目启动报错：Description: 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

1 回答Failed to invoke @ExceptionHandler method，无法正常抛出异常是怎么回事？

4 回答Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.5:generate (default-cli) on project miaosha: Communications link failure

2 回答Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.5:generate (default-cli) on project miaosha: Communications link failure