Invalid value type for attribute ‘factoryBeanObjectType‘: java.lang.String 的解决办法

问题概述

关于这个问题，博主是在跑单元测试的时候遇到的，本篇文章可能较长，如果只想解决问题本身，可只关注结果，跳过过程！

环境：

spring-boot 3.2.1
jdk 17

报错：“ Caused by: java.lang.IllegalArgumentException: Invalid value type for attribute 'factoryBeanObjectType': java.lang.String ”

莫名的参数类型错误，

如下图：

具体信息如下：

java.lang.IllegalStateException: Failed to load ApplicationContext for [WebMergedContextConfiguration@4b74b35 testClass = ...ApplicationTests, locations = [], classes = [com...Application], contextInitializerClasses = [], activeProfiles = [], propertySourceDescriptors = [], propertySourceProperties = ["org.springframework.boot.test.context.SpringBootTestContextBootstrapper=true"], contextCustomizers = [org.springframework.boot.test.context.filter.ExcludeFilterContextCustomizer@7bd4937b, org.springframework.boot.test.json.DuplicateJsonObjectContextCustomizerFactory$DuplicateJsonObjectContextCustomizer@741a8937, org.springframework.boot.test.mock.mockito.MockitoContextCustomizer@0, org.springframework.boot.test.web.client.TestRestTemplateContextCustomizer@2ea41516, org.springframework.boot.test.autoconfigure.actuate.observability.ObservabilityContextCustomizerFactory$DisableObservabilityContextCustomizer@1f, org.springframework.boot.test.autoconfigure.properties.PropertyMappingContextCustomizer@0, org.springframework.boot.test.autoconfigure.web.servlet.WebDriverContextCustomizer@4b0d79fc, org.springframework.boot.test.context.SpringBootTestAnnotation@4a86e4f0], resourceBasePath = "src/main/webapp", contextLoader = org.springframework.boot.test.context.SpringBootContextLoader, parent = null] at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:180) at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:130) at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:191) at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:130) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:260) at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:163) at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:310) at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:735) at java.base/java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:734) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762) at java.base/java.util.Optional.orElseGet(Optional.java:364) at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) Caused by: java.lang.IllegalArgumentException: Invalid value type for attribute 'factoryBeanObjectType': java.lang.String at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getTypeForFactoryBeanFromAttributes(FactoryBeanRegistrySupport.java:86) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryBean(AbstractAutowireCapableBeanFactory.java:836) at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:620) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:575) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:534) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:138) at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:789) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:606) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:762) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:464) at org.springframework.boot.SpringApplication.run(SpringApplication.java:334) at org.springframework.boot.test.context.SpringBootContextLoader.lambda$loadContext$3(SpringBootContextLoader.java:137) at org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:58) at org.springframework.util.function.ThrowingSupplier.get(ThrowingSupplier.java:46) at org.springframework.boot.SpringApplication.withHook(SpringApplication.java:1458) at org.springframework.boot.test.context.SpringBootContextLoader$ContextLoaderHook.run(SpringBootContextLoader.java:552) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:137) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:108) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:225) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:152) ... 17 more Process finished with exit code -1 

解决办法

根据错误信息，参数类型错误

参考【mybatis-spring-issues 855】得知：

在 Spring Boot 3.0后的 版本中FactoryBeanRegistrySupport#getTypeForFactoryBeanFromAttributes方法已变更，如果 factoryBeanObjectType 不是 ResolvableType 或 Class 类型会抛出 IllegalArgumentException 异常。

此时因为 factoryBeanObjectType 是 String 类型，不符合条件而抛出异常。

如下图：

项目中使用的 mybatis-plus-boot-starter 是当前最新版本 3.5.5，但 mybatis-spring 为2.1.2 

如下图：

但版本已不兼容，

兼容对照表：

MyBatis-Spring-Boot-Starter、MyBatis-Spring、Spring Boot、Java 版本兼容对照如下表：

好了，问题分析清楚了，

可以解决问题了，

第一步：排除 mybatis-plus-boot-starter 中的旧版本 mybatis-spring

 <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.5.5</version> <exclusions> <exclusion> <artifactId>mybatis-spring</artifactId> <groupId>org.mybatis</groupId> </exclusion> </exclusions> </dependency>

第二步：引入 mybatis-spring 3.0.3 版本

 <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>3.0.3</version> </dependency>

完整内容：

 <!--mybatis-plus--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.5.5</version> <exclusions> <exclusion> <artifactId>mybatis-spring</artifactId> <groupId>org.mybatis</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>3.0.3</version> </dependency>

第三步：测试

再次跑单元测试，就成功执行了，如下图：

源码扩展，可忽略：

Springboot Version 3.2.0-M2,spring-boot-starter 3.0.2 在这个版本中，FactoryBeanRegistrySupport.getTypeForFactoryBeanFromAttributes()方法已经改变，当“factoryBeanObjectType”不是ResolvableType或者Class类型时抛出一个IllegalArgumentException，

如下图：

org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getTypeForFactoryBeanFromAttributes

通过检查FactoryBean的属性来确定FactoryBean的bean类型
从ResolvableType中提取属性或者ResolvableType.NONE，
很遗憾，从ResolvableType中未找到FactoryBean的属性或者ResolvableType.NONE，

但是在 org.mybatis.spring.mapper.ClassPathMapperScanner.processBeanDefinitions()方法（第254行）设置一了个字符串类型beanClassName，

如下图：

在 mybatis-spring-3.0.3 通过反射创建一个Class类：

 String beanClassName = definition.getBeanClassName(); LOGGER.debug(() -> "Creating MapperFactoryBean with name '" + holder.getBeanName() + "' and '" + beanClassName + "' mapperInterface"); // the mapper interface is the original class of the bean // but, the actual class of the bean is MapperFactoryBean definition.getConstructorArgumentValues().addGenericArgumentValue(beanClassName); // issue #59 try { Class<?> beanClass = Resources.classForName(beanClassName); // Attribute for MockitoPostProcessor // https://github.com/mybatis/spring-boot-starter/issues/475 definition.setAttribute(FACTORY_BEAN_OBJECT_TYPE, beanClass); // for spring-native definition.getPropertyValues().add("mapperInterface", beanClass); } catch (ClassNotFoundException ignore) { // ignore }

如下图：

 到这里，就可以成功识别到Class类型了：

自此，问题就解决了，项目的单元测试模块跑通了，如下图：

其它补充：

好了，关于 Invalid value type for attribute ‘factoryBeanObjectType‘: java.lang.String 的解决办法  就写到这儿了，如果还有什么疑问或遇到什么问题欢迎扫码提问，也可以给我留言哦，我会一一详细的解答的。 
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