java ee基于注解方式的声明式事务实现
时间: 2023-12-17 10:03:48 浏览: 27
Java EE基于注解方式的声明式事务实现可以通过Spring框架的@Transactional注解来实现。具体步骤如下:
1.在Spring配置文件中开启事务管理器:
```xml
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
```
2.在需要使用事务的类或方法上添加@Transactional注解:
```java
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Transactional
public void addUser(User user) {
userDao.addUser(user);
}
}
```
3.在需要回滚事务的情况下,抛出RuntimeException或继承自RuntimeException的异常即可:
```java
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Transactional
public void addUser(User user) {
userDao.addUser(user);
if (user.getId() == null) {
throw new RuntimeException("添加用户失败");
}
}
}
```