源码分析：Mybatis - @MapperScan

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MyBatis - @MapperScan
        MybatisPlusAutoConfiguration
        --> AutoConfiguredMapperScannerRegistrar.registerBeanDefinitions
        --> MapperScannerConfigurer.postProcessBeanDefinitionRegistry
        
        ClassPathMapperScanner extends ClassPathBeanDefinitionScanner
        -> scan -> doScan
        -> super.doScan(basePackages);
        -> processBeanDefinitions
                -> definition.getConstructorArgumentValues().addGenericArgumentValue(Mapper.class);
                -> definition.setBeanClass(MapperFactoryBean.class);
                -> MapperFactoryBean.getObject()
                --->   return getSqlSession().getMapper(this.mapperInterface);