08-Dec-2021 12:08:06.572 严重 [RMI TCP Connection(3)-127.0.0.1] org.springframework.web.servlet.DispatcherServlet.initServletBean Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘employeeController’: Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.lyq.ssm.service.EmployeeService com.lyq.ssm.controller.EmployeeController.employeeService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘employeeService’: Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.lyq.ssm.dao.EmployeeMapper com.lyq.ssm.service.EmployeeService.employeeMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.lyq.ssm.dao.EmployeeMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292)

1、扫描注解是否开启
已开启

<context:component-scan base-package="com.lyq.ssm">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
</context:component-scan>

2、是否配置了spring监听器
未配置

    <!--配置spring的监听器，默认只加载WEB-INFO目录下的文件-->
<listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

配置完成之后，成功运行