背景

SpringMVC项目启动报错，项目使用了Spring整合Mybatis相关maven依赖。

核心报错信息

信息: Initializing Spring root WebApplicationContext
[INFO] Root WebApplicationContext: initialization started
[ERROR] Context initialization failed
java.lang.NoClassDefFoundError: org/springframework/aot/AotDetector
    at org.mybatis.spring.mapper.ClassPathMapperScanner.<init> (ClassPathMapperScanner.java:91)
    at org.mybatis.spring.mapper.MapperScannerConfigurer.postProcessBeanDefinitionRegistry (MapperScannerConfigurer.java:363)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors (PostProcessorRegistrationDelegate.java:280)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors (PostProcessorRegistrationDelegate.java:126)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors (AbstractApplicationContext.java:707)

原因

项目使用的mybatis-spring版本和spring或者是mybatis的版本不匹配导致。

解决

降低mybatis-spring的maven依赖版本为2.0.7。

之前的版本：

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.9.RELEASE</version>
        </dependency>
		<dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.13</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>3.0.3</version>
        </dependency>

mybatis-spring调整成2.0.7版本：

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.9.RELEASE</version>
        </dependency>
		<dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.13</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.7</version>
        </dependency>