1. SpringBoot如何注解事务声明式事务
- springboot的事务也主要分为两大类, - 一是xml声明式事务, - 二是注解事务,注解事务也可以实现类似声明式事务的方法, 
- springboot 之 xml事务 - 使用 @ImportResource("classpath:transaction.xml") 引入该xml的配置 
 
- springboot 注解事务 
- Transactional注解事务 - 注:需要在进行事物管理的方法上添加注解@Transactional,或者偷懒的话直接在类上面添加该注解 
- 注解声明式事务 - @Configuration 
 public class TxConfigBeanName {
 @Autowired
 private DataSourceTransactionManager transactionManager;
 // 创建事务通知
 @Bean(name = "txAdvice")
 public TransactionInterceptor getAdvisor() throws Exception {
 Properties properties = new Properties();
 properties.setProperty("get*", "PROPAGATION_REQUIRED,-Exception,readOnly");
 properties.setProperty("add*", "PROPAGATION_REQUIRED,-Exception,readOnly");
 properties.setProperty("save*", "PROPAGATION_REQUIRED,-Exception,readOnly");
 properties.setProperty("update*", "PROPAGATION_REQUIRED,-Exception,readOnly");
 properties.setProperty("delete*", "PROPAGATION_REQUIRED,-Exception,readOnly");
 TransactionInterceptor tsi = new TransactionInterceptor(transactionManager,properties);
 return tsi;
 }
 @Bean
 public BeanNameAutoProxyCreator txProxy() {
 BeanNameAutoProxyCreator creator = new BeanNameAutoProxyCreator();
 creator.setInterceptorNames("txAdvice");
 creator.setBeanNames("*Service", "*ServiceImpl");
 creator.setProxyTargetClass(true);
 return creator;
 }
 }
2. Spring的声明式事务处理怎么配置,可以在提交事务后关闭数据库连接
try {
			conn = u.getConnection();//连接数据库
			
			//业务层的处理方法的调用。。。。。。
			u.commit(conn);//提交
		} catch (Exception e) {
			u.rollback(conn);
			 
		} finally {
			 
			u.close(conn);//关闭
		}

