springmvc+hibernate整合事务不回滚,谁来拯救我

最近心血来潮研究下了springmvc,发现比struts2好用多了，配置也方便，捣鼓了一阵，最后想把hibernate也整进去，结果悲剧就来了，事务就是不回滚，实在没招了，哪位大侠给看下，上代码

springmvc-servlet.xml

	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:context="http://www.springframework.org/schema/context"
	default-autowire="byName" 
	xmlns:p="http://www.springframework.org/schema/p"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc 
		http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd  
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

	
	

	

	
	
		
		
	


	
			class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
		
			
		
		
			
				
									class="org.springframework.web.servlet.view.InternalResourceViewResolver">
					
					
				
			
		
		
			
									class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
			
		
	

applicationContext-db.xml

	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx" 
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"
	default-autowire="byName">

	
	
		
	 

	
		

		
		
		
		
		
		
		
	

	
	
		
		
		
		
			
				${hibernate.dialect}
				true
				none
				org.hibernate.search.store.FSDirectoryProvider 
				100	
				100 
				true 
				manual 
			
		
	

	
		
	

	
		
	

	

applicationContext-aop.xml

	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
			http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
			http://www.springframework.org/schema/context 
			http://www.springframework.org/schema/context/spring-context-3.0.xsd
			http://www.springframework.org/schema/tx 
			http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
            http://www.springframework.org/schema/aop 
            http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
	default-autowire="byName">

	
	 
		
	 

	

	
		
			  
              
              
              
              
              
              
	          
	          
	          
	          
		
	

	
		
		
	

UserServiceImpl

@Service(value = "userService")
@Transactional(rollbackFor=Exception.class)
public class UserServiceImpl implements UserService {

	@Autowired
	private UserDAO userDAO;

	@Override
	public void addUser(User user) {
			userDAO.addUser(user);
	}

}

UserDAOImpl

@Repository(value = "userDAO")
public class UserDAOImpl extends HibernateDaoSupport implements UserDAO {

	private Logger logger = Logger.getLogger(getClass());

	@Override
	public void addUser(User user) {
		logger.debug("新增用户");
		this.getHibernateTemplate().save(user);
	}

UserServiceTest

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"file:webroot/WEB-INF/springmvc-servlet.xml","classpath:applicationContext-*.xml"})
public class UserServiceTest{

	@Autowired
	private UserService userService;

	@Test
	public void testAddUser() {

		User user1 = new User();
		user1.setCode("A002");
		user1.setName("haha");
		userService.addUser(user1);

		User user2 = new User();
		user2.setCode("A001");
		user2.setName("haha");
		userService.addUser(user2);

		User user3 = new User();
		user3.setCode("A001");//code是唯一的,这里报唯一约束错误，前面两条数据是不是应该插入失败？
		user3.setName("haha");
		userService.addUser(user3);
	}

}

就在这里找不到问题了，use3前面写个更新也不行,user2还是会被更新，网上说扫描controller和service的时候分开，我也分开了，难道是DAO有问题还是怎么的，还是说配置有问题，望来位高人指点一二 :cry: