Consider defining a bean of type 'sample.mybatis.annotation.mapper.CityMapper' in your configuration.

[baymax55]

When I start SampleAnnotationApplication in module mybatis-spring-boot-samples, it shows this error:

D:\devPrograms\jdk\openjdk-18.0.2_windows-x64_bin\jdk-18.0.2\bin\java.exe -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-Dmanagement.endpoints.jmx.exposure.include=*" -javaagent:D:\devPrograms\JetBrains\ideaIU-2023.1.win\lib\idea_rt.jar=63800:D:\devPrograms\JetBrains\ideaIU-2023.1.win\bin -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath D:\code\github\spring-boot-starter\mybatis-spring-boot-samples\mybatis-spring-boot-sample-annotation\target\classes;D:\repository\org\springframework\boot\spring-boot-starter\3.1.2\spring-boot-starter-3.1.2.jar;D:\repository\org\springframework\boot\spring-boot\3.1.2\spring-boot-3.1.2.jar;D:\repository\org\springframework\boot\spring-boot-autoconfigure\3.1.2\spring-boot-autoconfigure-3.1.2.jar;D:\repository\org\springframework\boot\spring-boot-starter-logging\3.1.2\spring-boot-starter-logging-3.1.2.jar;D:\repository\ch\qos\logback\logback-classic\1.4.8\logback-classic-1.4.8.jar;D:\repository\ch\qos\logback\logback-core\1.4.8\logback-core-1.4.8.jar;D:\repository\org\apache\logging\log4j\log4j-to-slf4j\2.20.0\log4j-to-slf4j-2.20.0.jar;D:\repository\org\apache\logging\log4j\log4j-api\2.20.0\log4j-api-2.20.0.jar;D:\repository\org\slf4j\jul-to-slf4j\2.0.7\jul-to-slf4j-2.0.7.jar;D:\repository\jakarta\annotation\jakarta.annotation-api\2.1.1\jakarta.annotation-api-2.1.1.jar;D:\repository\org\yaml\snakeyaml\1.33\snakeyaml-1.33.jar;D:\repository\org\springframework\boot\spring-boot-starter-jdbc\3.1.2\spring-boot-starter-jdbc-3.1.2.jar;D:\repository\com\zaxxer\HikariCP\5.0.1\HikariCP-5.0.1.jar;D:\repository\org\springframework\spring-jdbc\6.0.11\spring-jdbc-6.0.11.jar;D:\code\github\spring-boot-starter\mybatis-spring-boot-autoconfigure\target\classes;D:\repository\org\mybatis\mybatis\3.5.13\mybatis-3.5.13.jar;D:\repository\org\mybatis\mybatis-spring\3.0.2\mybatis-spring-3.0.2.jar;D:\repository\com\h2database\h2\2.1.214\h2-2.1.214.jar;D:\repository\org\slf4j\slf4j-api\2.0.7\slf4j-api-2.0.7.jar;D:\repository\org\springframework\spring-core\6.0.11\spring-core-6.0.11.jar;D:\repository\org\springframework\spring-jcl\6.0.11\spring-jcl-6.0.11.jar;D:\repository\org\springframework\spring-tx\6.0.11\spring-tx-6.0.11.jar;D:\repository\org\springframework\boot\spring-boot-starter-web\3.1.2\spring-boot-starter-web-3.1.2.jar;D:\repository\org\springframework\boot\spring-boot-starter-json\3.1.2\spring-boot-starter-json-3.1.2.jar;D:\repository\com\fasterxml\jackson\core\jackson-databind\2.15.2\jackson-databind-2.15.2.jar;D:\repository\com\fasterxml\jackson\core\jackson-annotations\2.15.2\jackson-annotations-2.15.2.jar;D:\repository\com\fasterxml\jackson\core\jackson-core\2.15.2\jackson-core-2.15.2.jar;D:\repository\com\fasterxml\jackson\datatype\jackson-datatype-jdk8\2.15.2\jackson-datatype-jdk8-2.15.2.jar;D:\repository\com\fasterxml\jackson\datatype\jackson-datatype-jsr310\2.15.2\jackson-datatype-jsr310-2.15.2.jar;D:\repository\com\fasterxml\jackson\module\jackson-module-parameter-names\2.15.2\jackson-module-parameter-names-2.15.2.jar;D:\repository\org\springframework\boot\spring-boot-starter-tomcat\3.1.2\spring-boot-starter-tomcat-3.1.2.jar;D:\repository\org\apache\tomcat\embed\tomcat-embed-core\10.1.11\tomcat-embed-core-10.1.11.jar;D:\repository\org\apache\tomcat\embed\tomcat-embed-el\10.1.11\tomcat-embed-el-10.1.11.jar;D:\repository\org\apache\tomcat\embed\tomcat-embed-websocket\10.1.11\tomcat-embed-websocket-10.1.11.jar;D:\repository\org\springframework\spring-web\6.0.11\spring-web-6.0.11.jar;D:\repository\org\springframework\spring-beans\6.0.11\spring-beans-6.0.11.jar;D:\repository\io\micrometer\micrometer-observation\1.11.2\micrometer-observation-1.11.2.jar;D:\repository\io\micrometer\micrometer-commons\1.11.2\micrometer-commons-1.11.2.jar;D:\repository\org\springframework\spring-webmvc\6.0.11\spring-webmvc-6.0.11.jar;D:\repository\org\springframework\spring-aop\6.0.11\spring-aop-6.0.11.jar;D:\repository\org\springframework\spring-context\6.0.11\spring-context-6.0.11.jar;D:\repository\org\springframework\spring-expression\6.0.11\spring-expression-6.0.11.jar sample.mybatis.annotation.SampleAnnotationApplication

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v3.1.2)

2023-08-24T17:45:57.646+08:00  WARN 24380 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'sampleAnnotationApplication': Unsatisfied dependency expressed through constructor parameter 0: No qualifying bean of type 'sample.mybatis.annotation.mapper.CityMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
2023-08-24T17:45:57.695+08:00 ERROR 24380 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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

Description:

Parameter 0 of constructor in sample.mybatis.annotation.SampleAnnotationApplication required a bean of type 'sample.mybatis.annotation.mapper.CityMapper' that could not be found.


Action:

Consider defining a bean of type 'sample.mybatis.annotation.mapper.CityMapper' in your configuration.


Process finished with exit code 1

[kazuki43zoo]

@baymax55

I cannot reproduce by only your provided information.
Could you provide more detail information and/or a small reproduce project with GitHub repo or attached file?