作为一个想做架构师的程序猿，必须是一个优秀的程序猿。在引入某一个框架的时候，必需要研究源代码，将新的开源框架的风险变为可控性。
1.Spring结合Mybatis最经常使用的配置。
<!--理论加实践，才是架构师嘚最佳实践 -->
<!--JDBC
Data Source -->
<bean id= "testdataSource"
class= "org.springframework.jdbc.datasource.DriverManagerDataSource" >
<property name= "driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<!--
<property name="url" value="jdbc:oracle:thin:@127.0.0.1:1521:orcl"
/> -->
<property name= "url" value="jdbc:oracle:thin:@192.168.137.101:1521:ora92" />
<property name= "username" value ="sale" />
<property name= "password" value ="sale" />
</bean>
<bean id= "sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" >
<property name= "dataSource" ref ="testdataSource" />
<property name= "mapperLocations">
<list>
<value> classpath:com/etrading /mapping/**/*Mapper.xml</ value>
</list>
</property>
<!--
<property name="typeAliasesPackage" value="com.nicchagil.mybatis3spring3intg.bean"
/> -->
</bean>
<bean class= "org.mybatis.spring.mapper.MapperScannerConfigurer" >
<property name= "basePackage"
value= "com/etrading/mapping/common;com/etrading/mapping/account" />
<property name= "sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
1）Spring为了整合Mybatis，专门封装了一个jar包（mybatis-spring-1.2.3.jar）,当中MapperScannerConfigurer封装了自己主动扫描全局路径下的Mapper
2）MapperScannerConfigurer源代码分析(基于mybatis-spring-1.2.3.jar)
事实上要弄通源代码，一定要弄通spring容器源代码，这个是基础（理解框架设计的思想，事实上非常多代码思想是能够复用的）
简单的梳理下Spring容器思想：
Spring容器环境起来-->通过refresh()方法刷新容器（比較简洁）
MapperScannerConfigurer就是在刷新容器的过程中自己主动的运行方法postProcessBeanDefinitionRegistry
/**
* {@inheritDoc}
* 通过Spring容器触发postProcessBeanDefinitionRegistry
* @since 1.0.2
*/
@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry
registry) {
if ( this. processPropertyPlaceHolders )
{
processPropertyPlaceHolders();
}
//核心处理类ClassPathMapperScanner，通过反射机制载入注解bean到spring容器
ClassPathMapperScanner scanner = new ClassPathMapperScanner(registry);
scanner.setAddToConfig( this .addToConfig );
scanner.setAnnotationClass( this .annotationClass );
scanner.setMarkerInterface( this .markerInterface );
scanner.setSqlSessionFactory( this .sqlSessionFactory );//不须要在xml中设置sqlSessionFactory以及sqlSessionTemplate
scanner.setSqlSessionTemplate( this .sqlSessionTemplate );
scanner.setSqlSessionFactoryBeanName( this .sqlSessionFactoryBeanName );
scanner.setSqlSessionTemplateBeanName( this .sqlSessionTemplateBeanName );
scanner.setResourceLoader( this .applicationContext );
scanner.setBeanNameGenerator( this .nameGenerator );
scanner.registerFilters();
//真正自己主动化扫描的类
scanner.scan(StringUtils. tokenizeToStringArray( this. basePackage,
ConfigurableApplicationContext.CONFIG_LOCATION_DELIMITERS ));
}
孜孜不倦、厚积薄发。
----胡弦语录
