公司新的项目升级到了springboot3.x后，步步是坑，坑坑不同，各种疑难杂症层出不穷，让老中医也也苦不堪言，java的生态圈真让人无语，你们升级能不能认真些互相兼顾一下？

这次的项目用了springboot3.2.5 + mybatisplus，最基本的需求了，上来就是下马威，启动报错，退回3.1.5就正常。他大爷的，太欺负人了。

依赖

        <dependency>

            <groupId>com.baomidou</groupId>

            <artifactId>mybatis-plus-boot-starter</artifactId>

            <version>3.5.6</version>

        </dependency>

        <dependency>

            <groupId>com.baomidou</groupId>

            <artifactId>mybatis-plus-generator</artifactId>

            <version>3.5.6</version>

        </dependency>

        <dependency>

            <groupId>org.xerial</groupId>

            <artifactId>sqlite-jdbc</artifactId>

            <version>3.45.2.0</version>

        </dependency>

错误信息

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-6.1.6.jar:6.1.6]

         at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryBean(AbstractAutowireCapableBeanFactory.java:837) ~[spring-beans-6.1.6.jar:6.1.6]

         at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:652) ~[spring-beans-6.1.6.jar:6.1.6]

         at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:575) ~[spring-beans-6.1.6.jar:6.1.6]

         at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:534) ~[spring-beans-6.1.6.jar:6.1.6]

         at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:138) ~[spring-context-6.1.6.jar:6.1.6]

         at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:788) ~[spring-context-6.1.6.jar:6.1.6]

         at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:606) ~[spring-context-6.1.6.jar:6.1.6]

         at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.2.5.jar:3.2.5]

         at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.2.5.jar:3.2.5]

         at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.2.5.jar:3.2.5]

         at org.springframework.boot.SpringApplication.run(SpringApplication.java:334) ~[spring-boot-3.2.5.jar:3.2.5]

         at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354) ~[spring-boot-3.2.5.jar:3.2.5]

         at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343) ~[spring-boot-3.2.5.jar:3.2.5]

         at cn.jet.demo2.Demo2Application.main(Demo2Application.java:12) ~[classes/:na]

简而言之：

java.lang.IllegalArgumentException: Invalid value type for attribute 'factoryBeanObjectType'

原因

mybatis-plus 依赖的 mybatis-spring 版本低导致的问题

解决办法

将 mybatis-spring 升级到3.0以上就可以了

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.6</version>
            <exclusions>
                <exclusion>
                    <artifactId>mybatis</artifactId>
                    <groupId>org.mybatis</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>mybatis-spring</artifactId>
                    <groupId>org.mybatis</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.5.6</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.16</version>
        </dependency>

        <dependency>
            <groupId>org.xerial</groupId>
            <artifactId>sqlite-jdbc</artifactId>
            <version>3.45.2.0</version>
        </dependency>

排除mybatis-plus默认的低版本的mybatis-spring-boot-starter和mybatis依赖，添加高版本的的依赖