<code>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:837)

at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:652)

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:788)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:606)

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146)

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754)

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:334)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1354)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343)

at cn.com.profitpilot.parcel.ParcelProfitPilotApplication.main(ParcelProfitPilotApplication.java:12)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:568)

at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:50)

在使用mybatisplus的时候配置正确，引入依赖的时候报以上的异常；

<dependency>

<groupId>com.baomidou</groupId>

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

<version>3.5.6</version>

</dependency>

<dependency>

<groupId>com.mysql</groupId>

<artifactId>mysql-connector-j</artifactId>

<version>8.4.0</version>

</dependency>

根据异常信息大概判断是bean装配类型不匹配。

这里看mybatisplus这个包依赖mybatis-spring:2.1.2 ，有可能是这个依赖包版本低导致的，所以我先把这个包更新到新的版本看一下问题能否解决。

<code><!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter -->

<dependency>

<groupId>com.baomidou</groupId>

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

<version>3.5.6</version>

<exclusions>

<exclusion>

<groupId>org.mybatis</groupId>

<artifactId>mybatis-spring</artifactId>

</exclusion>

</exclusions>

</dependency>

<dependency>

<groupId>org.mybatis</groupId>

<artifactId>mybatis-spring</artifactId>

<version>3.0.3</version>

</dependency>

我们引入3.0.3版本，测试再没法发现之前的异常，可以从数据库中读写数据了，间接的证明的问题就在包依赖上。