【spring boot】mybatis启动报错：Consider defining a bean of type 'com.newhope.interview.dao.UserMapper' in your configuration.

2018-02-24 22:41:00.442  WARN 2952 --- [           main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'userMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.newhope.interview.dao.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2018-02-24 22:41:00.444  INFO 2952 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
2018-02-24 22:41:00.465  INFO 2952 --- [           main] utoConfigurationReportLoggingInitializer :

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2018-02-24 22:41:00.564 ERROR 2952 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   :

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APPLICATION FAILED TO START
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Description:

Field userMapper in com.newhope.interview.service.impl.UserServiceImpl required a bean of type 'com.newhope.interview.dao.UserMapper' that could not be found.

Action:

Consider defining a bean of type 'com.newhope.interview.dao.UserMapper' in your configuration.