@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Documented
@Import(MyMapperScannerRegistrar.class)
@Repeatable(MapperScans.class)
public @interface MapperScan {
  String[] value() default {};
  String[] basePackages() default {};
 
  Class<?>[] basePackageClasses() default {};
 
  Class<? extends BeanNameGenerator> nameGenerator() default BeanNameGenerator.class;
  Class<? extends Annotation> annotationClass() default Annotation.class;
  Class<?> markerInterface() default Class.class;
 
  String sqlSessionTemplateRef() default "";
  String sqlSessionFactoryRef() default "";
  
  Class<? extends MapperFactoryBean> factoryBean() default MapperFactoryBean.class;
  String lazyInitialization() default "";
}

public class MyMapperScannerRegistrar extends MapperScannerRegistrar {
    private ResourceLoader resourceLoader;
    /**
     * {@inheritDoc}
     */
    @Override
    public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
        AnnotationAttributes annoAttrs = AnnotationAttributes.fromMap(importingClassMetadata.getAnnotationAttributes(MapperScan.class.getName()));
        //這個(gè)是自己的
        ClassPathMapperScanner scanner = new MyClassPathMapperScanner(registry);
        // this check is needed in Spring 3.1
        if (resourceLoader != null) {
            scanner.setResourceLoader(resourceLoader);
        }
        Class<? extends Annotation> annotationClass = annoAttrs.getClass("annotationClass");
        if (!Annotation.class.equals(annotationClass)) {
            scanner.setAnnotationClass(annotationClass);
        }
        Class<?> markerInterface = annoAttrs.getClass("markerInterface");
        if (!Class.class.equals(markerInterface)) {
            scanner.setMarkerInterface(markerInterface);
        }
        Class<? extends BeanNameGenerator> generatorClass = annoAttrs.getClass("nameGenerator");
        if (!BeanNameGenerator.class.equals(generatorClass)) {
            scanner.setBeanNameGenerator(BeanUtils.instantiateClass(generatorClass));
        }
        Class<? extends MapperFactoryBean> mapperFactoryBeanClass = annoAttrs.getClass("factoryBean");
        if (!MapperFactoryBean.class.equals(mapperFactoryBeanClass)) {
            scanner.setMapperFactoryBean(BeanUtils.instantiateClass(mapperFactoryBeanClass));
        }
        scanner.setSqlSessionTemplateBeanName(annoAttrs.getString("sqlSessionTemplateRef"));
        scanner.setSqlSessionFactoryBeanName(annoAttrs.getString("sqlSessionFactoryRef"));
        List<String> basePackages = new ArrayList<String>();
        for (String pkg : annoAttrs.getStringArray("value")) {
            if (StringUtils.hasText(pkg)) {
                basePackages.add(pkg);
            }
        }
        for (String pkg : annoAttrs.getStringArray("basePackages")) {
            if (StringUtils.hasText(pkg)) {
                basePackages.add(pkg);
            }
        }
        for (Class<?> clazz : annoAttrs.getClassArray("basePackageClasses")) {
            basePackages.add(ClassUtils.getPackageName(clazz));
        }
        scanner.registerFilters();
        scanner.doScan(StringUtils.toStringArray(basePackages));
    }
    /**
     * {@inheritDoc}
     */
    @Override
    public void setResourceLoader(ResourceLoader resourceLoader) {
        this.resourceLoader = resourceLoader;
    }
}

public class MyClassPathMapperScanner extends ClassPathMapperScanner {
    public MyClassPathMapperScanner(BeanDefinitionRegistry registry) {
        super(registry);
    }
    @Override
    protected boolean isCandidateComponent(AnnotatedBeanDefinition beanDefinition) {
        boolean flag = super.isCandidateComponent(beanDefinition);
        //包名帶有Mapper的才會(huì)被mybatis代理
        boolean mapper = beanDefinition.getBeanClassName().contains("Mapper");
        return flag && mapper;
    }
}

import org.mybatis.spring.annotation.MapperScan;

import tk.mybatis.spring.annotation.MapperScan;