Question

我有一个实体User，一个Repository / Dao类UserDao（使用 Spring Data JPA ）和一个Service类UserService，其方法为{{ 1}}注释为addUser：

@Transactional

@Service public class UserService { @Autowired private UserDao userDao; @Transactional public void addUser() throws Exception { User user = new User(); user.setUsername("aaa"); // Save the user, but since this method have the @Transactional // annotation it should not be committed.... userDao.save(user); // Forcing an error here I expected that the previous operation // were rolled back.. Instead the user is saved in the db. if ("".equals("")) { throw new Exception("something fails"); } // Other operations (never executed in this example) user.setUsername("bbb"); userDao.save(user); return; } // method addUser } // class UserService就是这样：

UserDao

阅读Spring Data JPA documentation以及关于同一论点（1，2）的其他问题，我的期望是标有@Transactional public interface UserDao extends CrudRepository<User, Long> { }的方法中的每个操作都将如果发生某些错误，请回滚..

我做错了什么？如果发生错误，是否有办法在前一个示例中回滚保存操作？

Answer 1

您的理解是正确的，但是仅对运行时未经检查的异常进行自动回滚。

因此，假设您的事务管理器配置正确，要在非运行时回滚，检查异常，请将rollbackFor属性添加到事务注释：

@Transactional(rollbackFor=Exception.class)
public void addUser() throws Exception {

}

Answer 2

您需要向Xml配置文件添加内容..您需要添加trnasaction manager。

 <tx:annotation-driven transaction-manager="txMgrDataSource" />

<!-- Creating TransactionManager Bean, since JDBC we are creating of type
    DataSourceTransactionManager -->
<bean id="txMgrDataSource"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="DataSource" />
</bean>

假设您的数据来源是：

<bean id="DataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="####" />
    <property name="url"
              value="jdbc:sqlConnection" />
    <property name="username" ref="user" />
    <property name="password" ref="pass" />

</bean>

Spring Data JPA上嵌套的@Transactional注释行为

2 个答案: