springboot3项目整合Mybatis-plus启动项目报错：Invalid bean definition with name ‘xxxMapper‘

springboot3+jdk17+Mybatis-plus运行项目时报错如下：

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-11-04T22:03:02.722+08:00 ERROR 18880 --- [backend] [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'userMapper' defined in file [E:\Project\idea_java_Project\spring\kob_2\backend\target\classes\com\kob\backend\mapper\UserMapper.class]: Invalid value type for attribute 'factoryBeanObjectType': java.lang.String
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryBean(AbstractAutowireCapableBeanFactory.java:857) ~[spring-beans-6.1.13.jar:6.1.13]
at org.springframework.beans.factory.support.AbstractBeanFactory.getType(AbstractBeanFactory.java:743) ~[spring-beans-6.1.13.jar:6.1.13]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAnnotationOnBean(DefaultListableBeanFactory.java:735) ~[spring-beans-6.1.13.jar:6.1.13]
at org.springframework.boot.sql.init.dependency.AnnotationDependsOnDatabaseInitializationDetector.detect(AnnotationDependsOnDatabaseInitializationDetector.java:36) ~[spring-boot-3.3.4.jar:3.3.4]
at org.springframework.boot.sql.init.dependency.DatabaseInitializationDependencyConfigurer$DependsOnDatabaseInitializationPostProcessor.detectDependsOnInitializationBeanNames(DatabaseInitializationDependencyConfigurer.java:152) ~[spring-boot-3.3.4.jar:3.3.4]
at org.springframework.boot.sql.init.dependency.DatabaseInitializationDependencyConfigurer$DependsOnDatabaseInitializationPostProcessor.postProcessBeanFactory(DatabaseInitializationDependencyConfigurer.java:115) ~[spring-boot-3.3.4.jar:3.3.4]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:363) ~[spring-context-6.1.13.jar:6.1.13]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:197) ~[spring-context-6.1.13.jar:6.1.13]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:789) ~[spring-context-6.1.13.jar:6.1.13]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:607) ~[spring-context-6.1.13.jar:6.1.13]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.3.4.jar:3.3.4]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.3.4.jar:3.3.4]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.3.4.jar:3.3.4]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) ~[spring-boot-3.3.4.jar:3.3.4]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1363) ~[spring-boot-3.3.4.jar:3.3.4]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1352) ~[spring-boot-3.3.4.jar:3.3.4]
at com.kob.backend.BackendApplication.main(BackendApplication.java:10) ~[classes/:na]

解决方案：

将pom.xml中，本来用的：

 <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.8</version>
        </dependency>

改为了：

 <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-spring-boot3-starter</artifactId>
            <version>3.5.8</version>
        </dependency>

原文地址：https://blog.csdn.net/qq_45067482/article/details/143495330

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