Mybatis MapperScannerConfigurer自动扫描Mapper接口生成代理注入到Spring的方法

<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
 <property name="mapperInterface" value="com.bijian.study.dao" />
 <property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>

<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
 <property name="mapperInterface" value="com.bijian.study.dao" />
 <property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>

<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
	<property name="dataSource" ref="dataSource" />
	<property name="mapperLocations" value="classpath*:**/*Dao*.xml"></property>
</bean>

<!-- dao配置 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
	<property name="basePackage" value="com.bijian.study.dao" />
	<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>

/** 
 * {@inheritDoc} 
 * 
 * @since 1.0.2 
 */ 
@Override 
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) { 
 if (this.processPropertyPlaceHolders) { 
 processPropertyPlaceHolders(); 
 } 
 
 ClassPathMapperScanner scanner = new ClassPathMapperScanner(registry); 
 scanner.setAddToConfig(this.addToConfig); 
 scanner.setAnnotationClass(this.annotationClass); 
 scanner.setMarkerInterface(this.markerInterface); 
 scanner.setSqlSessionFactory(this.sqlSessionFactory); 
 scanner.setSqlSessionTemplate(this.sqlSessionTemplate); 
 scanner.setSqlSessionFactoryBeanName(this.sqlSessionFactoryBeanName); 
 scanner.setSqlSessionTemplateBeanName(this.sqlSessionTemplateBeanName); 
 scanner.setResourceLoader(this.applicationContext); 
 scanner.setBeanNameGenerator(this.nameGenerator); 
 scanner.registerFilters(); 
 scanner.scan(StringUtils.tokenizeToStringArray(this.basePackage, ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS)); 
} 

/** 
 * Perform a scan within the specified base packages. 
 * @param basePackages the packages to check for annotated classes 
 * @return number of beans registered 
 */ 
public int scan(String... basePackages) { 
 int beanCountAtScanStart = this.registry.getBeanDefinitionCount(); 
 
 doScan(basePackages); 
 
 // Register annotation config processors, if necessary. 
 if (this.includeAnnotationConfig) { 
 AnnotationConfigUtils.registerAnnotationConfigProcessors(this.registry); 
 } 
 
 return (this.registry.getBeanDefinitionCount() - beanCountAtScanStart); 
} 

/** 
 * Perform a scan within the specified base packages, 
 * returning the registered bean definitions. 
 * <p>This method does <i>not</i> register an annotation config processor 
 * but rather leaves this up to the caller. 
 * @param basePackages the packages to check for annotated classes 
 * @return set of beans registered if any for tooling registration purposes (never {@code null}) 
 */ 
protected Set<BeanDefinitionHolder> doScan(String... basePackages) { 
 Assert.notEmpty(basePackages, "At least one base package must be specified"); 
 Set<BeanDefinitionHolder> beanDefinitions = new LinkedHashSet<BeanDefinitionHolder>(); 
 for (String basePackage : basePackages) { 
 Set<BeanDefinition> candidates = findCandidateComponents(basePackage); 
 for (BeanDefinition candidate : candidates) { 
  ScopeMetadata scopeMetadata = this.scopeMetadataResolver.resolveScopeMetadata(candidate); 
  candidate.setScope(scopeMetadata.getScopeName()); 
  String beanName = this.beanNameGenerator.generateBeanName(candidate, this.registry); 
  if (candidate instanceof AbstractBeanDefinition) { 
  postProcessBeanDefinition((AbstractBeanDefinition) candidate, beanName); 
  } 
  if (candidate instanceof AnnotatedBeanDefinition) { 
  AnnotationConfigUtils.processCommonDefinitionAnnotations((AnnotatedBeanDefinition) candidate); 
  } 
  if (checkCandidate(beanName, candidate)) { 
  BeanDefinitionHolder definitionHolder = new BeanDefinitionHolder(candidate, beanName); 
  definitionHolder = AnnotationConfigUtils.applyScopedProxyMode(scopeMetadata, definitionHolder, this.registry); 
  beanDefinitions.add(definitionHolder); 
  registerBeanDefinition(definitionHolder, this.registry); 
  } 
 } 
 } 
 return beanDefinitions; 
}