@Configuration 去xml化添加事务功能

###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http://docs.spring.io/spring/docs/4.0.x/javadoc-api/org/springframework/transaction/annotation/EnableTransactionManagement.html，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