一、问题描述

SpringBoot 项目整合mybatis-plus与 spring-boot-starter-test启动项，启动时报错：

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
 ERROR 26168 --- [           main] o.s.boot.SpringApplication               : Application run failed

java.lang.IllegalArgumentException: Invalid value type for attribute 'factoryBeanObjectType': java.lang.String
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getTypeForFactoryBeanFromAttributes(FactoryBeanRegistrySupport.java:86) ~[spring-beans-6.1.1.jar:6.1.1]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryBean(AbstractAutowireCapableBeanFactory.java:838) ~[spring-beans-6.1.1.jar:6.1.1]
	at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:620) ~[spring-beans-6.1.1.jar:6.1.1]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:573) ~[spring-beans-6.1.1.jar:6.1.1]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:532) ~[spring-beans-6.1.1.jar:6.1.1]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:138) ~[spring-context-6.1.1.jar:6.1.1]
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:775) ~[spring-context-6.1.1.jar:6.1.1]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:597) ~[spring-context-6.1.1.jar:6.1.1]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:753) ~[spring-boot-3.2.0.jar:3.2.0]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:455) ~[spring-boot-3.2.0.jar:3.2.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:323) ~[spring-boot-3.2.0.jar:3.2.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1342) ~[spring-boot-3.2.0.jar:3.2.0]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1331) ~[spring-boot-3.2.0.jar:3.2.0]
	at org.example.Main.main(Main.java:13) ~[classes/:na]

二、解决方案

pom.xml 忘记添加 mybatis 的 starter :

<!-- mybatis-plus  -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.3.1</version>
</dependency>

<!-- 导入 MyBatis 依赖链,预定义了一堆 mybatis application.yml 配置项 -->
<!-- 仅导入 mybatis-plus 的依赖启动类，将报错 -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>3.0.3</version>
</dependency>

三、拓展

主要是因为对 starter 不够熟悉，误以为 mybatis-plus-boot-starter已经包含了对 mybatis 的依赖。