ERROR [main] - Error while adding the mapper 'interface com.itheima.core.dao.CustomerDao' to configu

重新開機Apache伺服器時報錯：

ERROR [main] - Error while adding the mapper 'interface com.itheima.core.dao.CustomerDao' to configuration.

ERROR [main] - Error while adding the mapper 'interface com.itheima.core.dao.CustomerDao' to configuration.

org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: org.apache.ibatis.builder.BuilderException: Error resolving class. Cause: org.apache.ibatis.type.TypeException: Could not resolve type alias 'customer'.  Cause: java.lang.ClassNotFoundException: Cannot find class: customer

    at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:120)

    at org.apache.ibatis.builder.xml.XMLMapperBuilder.parse(XMLMapperBuilder.java:92)

    at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.loadXmlResource(MapperAnnotationBuilder.java:173)

    at org.apache.ibatis.builder.annotation.MapperAnnotationBuilder.parse(Mapper