SSM error: bean injection failed_Why does the backend write paging will report a bean error_Kakahushuo Blog

class=”markdown_views prism-atom-one-dark”> Error message: Error creating bean with name ‘atUserAction’: Unsatisfied dependency expressed through field ‘atUserService’; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ‘cn.overloard.service.AtUserService’ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} This error means that the bean injection failed, we can find it in the order of container initialization. 1. Look at web.xml first. There is a listener configured here, especially classpath: This parameter must be checked to see if it matches the name of the configuration file. <listener listener-classorg.springframework.web.context.ContextLoaderListener</listener -class </listener context-param param-namecontextConfigLocation</param-name param-valueclasspath:applicationContext-*.xml</param-value </context-param> 2. Check the applicationContext.xml and springMVC.xml files. In general projects, it is injected by package scanning, so check if the scanned package path is correct. applicationContext.xml context:component-scan base-package=”cn.overloard”> context:exclude-filter type=”annotation” expression=”org.springframework.stereotype.Controller” /> </context:component- scan springMVC.xml context:component-scan base-package= “cn.overloard” use-default-filters=”false” context:include-filter type=”annotation” expression=”org.springframework.stereotype.Controller”/> </context:component- scan 3. Check if there is any annotation in the class that you forgot to write Generally, one of these @Controller, @Service, @Repository, @Component annotations Such as: @Service public class AtUserServiceImpl implements AtUserService{ } @Controller public class AtUserAction { } 4. If you configure beans through xml. You need to check whether the id and class are correct. bean id=”persion” class=”cn.overloard.utils.Persion”/>