問題描述

我正在嘗試用spring、junit測試 DAO 的方法，我看到網上的一些做法是使用 spring 的聲明式事務管理(即@Transactional)進行事務操作，說是這樣在測試完成之后能夠spring會讓測試的方法回滾，從而達到測試的目的。然后我按照這一做法對dao中添加操作的方法進行了測試，發現事務進行提交后，回滾沒有成功，數據庫中多出來了我進行測試的數據。一開始我以為是spring沒有進行回滾，但是后面觀察控制臺打印信息發現是有rollback信息的，但是為什么會失敗呢，就不清楚。我查到一些相關的方案，但是我發現并沒能解決我的問題。很困擾，特來請教各位，望不吝指教。

以下是我的代碼和相應配置

DAOImpl 的addUser()方法

@Override public void addUser(User u) {Session session = sessionFactory.openSession();Transaction tc = session.getTransaction();try { tc.begin(); session.save(u); tc.commit();}catch(Exception e){ tc.rollback(); e.printStackTrace();}return ; }

daos.xml 文件相應配置

<bean class='org.springframework.orm.hibernate5.HibernateTransactionManager'><property name='sessionFactory' ref='mySessionFactory' /> </bean> <tx:annotation-driven transaction-manager='txManager' />

測試類

@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations={'/services.xml'})@Transactional(transactionManager = 'txManager')@Rollback(true)public class UserServiceImplTest {@Autowired UserDAO userDAO; //自動裝配userDAO@Test public void testAddUse(){User u = new User();u.setLevel(3);u.setName('ab11');u.setPassword('hh');userDAO.addUser(u);Assert.assertEquals(u.getName(), userDAO.getUserList().get(userDAO.getUserList().size()-1).getName()); }

部分控制臺打印信息

信息: Using DataSource [org.apache.commons.dbcp2.BasicDataSource@498d318c] of Hibernate SessionFactory for HibernateTransactionManager六月 02, 2017 4:46:19 下午 org.springframework.test.context.transaction.TransactionContext startTransaction信息: Began transaction (1) for test context [DefaultTestContext@52d6cd34 testClass = UserServiceImplTest, testInstance = com.dxzh.mall.serviceImpl.test.UserServiceImplTest@715d6168, testMethod = testAddUse@UserServiceImplTest, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@75798d03 testClass = UserServiceImplTest, locations = ’{classpath:/services.xml}’, classes = ’{}’, contextInitializerClasses = ’[]’, activeProfiles = ’{}’, propertySourceLocations = ’{}’, propertySourceProperties = ’{}’, contextCustomizers = set[[empty]], contextLoader = ’org.springframework.test.context.support.DelegatingSmartContextLoader’, parent = [null]]]; transaction manager [org.springframework.orm.hibernate5.HibernateTransactionManager@c6634d]; rollback [true]Fri Jun 02 16:46:19 CST 2017 WARN: Establishing SSL connection without server’s identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn’t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to ’false’. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.Hibernate: insert into user (name, password, level) values (?, ?, ?)六月 02, 2017 4:46:19 下午 org.springframework.test.context.transaction.TransactionContext endTransaction信息: Rolled back transaction for test context [DefaultTestContext@52d6cd34 testClass = UserServiceImplTest, testInstance = com.dxzh.mall.serviceImpl.test.UserServiceImplTest@715d6168, testMethod = testAddUse@UserServiceImplTest, testException = java.lang.RuntimeException, mergedContextConfiguration = [MergedContextConfiguration@75798d03 testClass = UserServiceImplTest, locations = ’{classpath:/services.xml}’, classes = ’{}’, contextInitializerClasses = ’[]’, activeProfiles = ’{}’, propertySourceLocations = ’{}’, propertySourceProperties = ’{}’, contextCustomizers = set[[empty]], contextLoader = ’org.springframework.test.context.support.DelegatingSmartContextLoader’, parent = [null]]].六月 02, 2017 4:46:19 下午 org.springframework.context.support.GenericApplicationContext doClose信息: Closing org.springframework.context.support.GenericApplicationContext@3ffc5af1: startup date [Fri Jun 02 16:46:13 CST 2017]; root of context hierarchy

問題解答

用dbunit 結合 spring-test 去測試

Transactional是service層事務，用了就不必在DAO層寫事務了