###初始化类###

类注解

@Configuration@ComponentScan(basePackages = AppConfig.BASEPACKAGE, 	excludeFilters = { 		@ComponentScan.Filter(type = FilterType.ANNOTATION, value = {Controller.class, RestController.class}) })public class RootConfiguration {

1.采用注解式事务，需要在类加添加@EnableTransactionManagement

@Bean    public PlatformTransactionManager transactionManager(DataSource dataSource) {        return new DataSourceTransactionManager(dataSource);    }

2.拦截器式

@Bean(name="transactionManager")	public DataSourceTransactionManager transactionManager(DataSource dataSource) {		DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();		transactionManager.setDataSource(dataSource);		transactionManager.setGlobalRollbackOnParticipationFailure(false);		return transactionManager;	}		@Bean(name="transactionInterceptor")	public TransactionInterceptor transactionInterceptor(DataSourceTransactionManager transactionManager) {		TransactionInterceptor transactionInterceptor = new TransactionInterceptor();		transactionInterceptor.setTransactionManager(transactionManager);		Properties properties = new Properties();		properties.setProperty("*", "PROPAGATION_REQUIRED,ISOLATION_DEFAULT,-Exception");		transactionInterceptor.setTransactionAttributes(properties);		return transactionInterceptor;	}		@Bean(name="beanNameAutoProxyCreator")	public BeanNameAutoProxyCreator beanNameAutoProxyCreator() {		BeanNameAutoProxyCreator beanNameAutoProxyCreator = new BeanNameAutoProxyCreator();		beanNameAutoProxyCreator.setProxyTargetClass(true);		beanNameAutoProxyCreator.setBeanNames("*Service");		beanNameAutoProxyCreator.setInterceptorNames("transactionInterceptor");		return beanNameAutoProxyCreator;	}

###注意事项###

在某个方法依赖另外一个bean时，不可以直接调用生成bean的方法。如以上依赖dataSource的地方较多，不可以直接调用dataSource()方法，否则会生成多个实例，导致最后事务不成功，实际使用的可能是实例A，但事务管理到的可能是实例B，从日志中看一切正常，也调用了doRollBack的。但在跟踪代码时会发现在TransactionSynchronizationManager.getSynchronizations()返回了两个，分别为：org.mybatis.spring.SqlSessionUtils$SqlSessionSynchronization@ff5c61f，org.springframework.jdbc.datasource.DataSourceUtils$ConnectionSynchronization@4545f833。官方文档里面直接调用方法的，不知道是否可以通过什么方式实现这种直接调用

正确的获取方式为：

1.直接通过参数传递需要的依赖

2.参数传递ListableBeanFactory，通过这个获取