APPLICATION FAILED TO START（主要是mybatils引入冲突，在pom.xml里解决冲突即可）

Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'studentController' defined in file [D:\javaback\MyDemo\target\classes\com\example\mydemo\controller\StudentController.class]: Unsatisfied dependency expressed through constructor parameter 0: Error creating bean with name 'studentServiceImpl': Unsatisfied dependency expressed through field 'baseMapper': Error creating bean with name 'studentMapper' defined in file [D:\javaback\MyDemo\target\classes\com\example\mydemo\mapper\StudentMapper.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory': Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]: Unsatisfied dependency expressed through method 'sqlSessionFactory' parameter 0: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception with message: Failed to determine a suitable driver class
2023-07-20T10:19:05.372+08:00  INFO 43492 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2023-07-20T10:19:05.394+08:00  INFO 43492 --- [           main] .s.b.a.l.ConditionEvaluationReportLogger :

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2023-07-20T10:19:05.415+08:00 ERROR 43492 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   :

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APPLICATION FAILED TO START
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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

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).

进程已结束,退出代码1

解决方案：1选择pom.xml

2鼠标移动到打开的pom.xml点击右键选择maven 显示图

3ctrl+鼠标左键移动找到红线  可以看到引入冲突

4将 pom.xml mybatis-plus-extension版本从3.4.0升级到3.5.3.1解决冲突

com.baomidou
mybatis-plus-extension
3.4.0