springboot 异常： Requested bean is currently in creation: Is there an unresolvable circular reference?

2018-07-31 11:56:18.812  WARN 10316 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'adminController': Unsatisfied dependency expressed through field 'adminUserService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'adminUserService': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'adminUserDao' defined in file [E:antdWorkspacepayadminv5	argetclassescompaycloudxdaoAdminUserDao.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [com/baomidou/mybatisplus/spring/boot/starter/MybatisPlusAutoConfiguration.class]: Unsatisfied dependency expressed through method 'sqlSessionFactory' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'dataSource' defined in class path resource [com/paycloudx/datasources/DynamicDataSourceConfig.class]: Unsatisfied dependency expressed through method 'dataSource' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'firstDataSource' defined in class path resource [com/paycloudx/datasources/DynamicDataSourceConfig.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.jdbc.DataSourceInitializerInvoker': Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'dataSource': Requested bean is currently in creation: Is there an unresolvable circular reference?
2018-07-31 11:56:18.825  INFO 10316 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2018-07-31 11:56:18.834  WARN 10316 --- [ost-startStop-1] o.a.c.loader.WebappClassLoaderBase       : The web application [ROOT] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
 java.lang.Object.wait(Native Method)
 java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
 com.mysql.cj.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43)
2018-07-31 11:56:18.845  INFO 10316 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-07-31 11:56:18.847 ERROR 10316 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The dependencies of some of the beans in the application context form a cycle:

   adminController (field private com.paycloudx.service.AdminUserService com.paycloudx.controller.AdminController.adminUserService)
      ↓
   adminUserService (field protected com.baomidou.mybatisplus.mapper.BaseMapper com.baomidou.mybatisplus.service.impl.ServiceImpl.baseMapper)
      ↓
   adminUserDao defined in file [E:antdWorkspacepayadminv5	argetclassescompaycloudxdaoAdminUserDao.class]
      ↓
   sqlSessionFactory defined in class path resource [com/baomidou/mybatisplus/spring/boot/starter/MybatisPlusAutoConfiguration.class]
┌─────┐
|  dataSource defined in class path resource [com/paycloudx/datasources/DynamicDataSourceConfig.class]
↑     ↓
|  firstDataSource defined in class path resource [com/paycloudx/datasources/DynamicDataSourceConfig.class]
↑     ↓
|  org.springframework.boot.autoconfigure.jdbc.DataSourceInitializerInvoker
└─────┘



Process finished with exit code 1

项目框架：

springboot + Mybatis + Mybatis Plus 

配置了druid多数据源，刚搭建的时候启动正常，写好Controller，Service，Dao等代码后，启动报错。

百度不到对应的错了，问了公司大神，一下子就解决了，唉。

解决方案：

　　启动类注解：

    @SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})