SpringMVC @Transactional的陷井大坑引发No Session found for current thread

一、TransactionManager事务配置

（1）注解配置

配置spring的xml加@Transactional

<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />

（2）xml配置

<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" read-only="true" />
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="update" propagation="REQUIRED" />
<tx:method name="delete" propagation="REQUIRED" />
</tx:attributes>
</tx:advice>
<aop:config proxy-target-class="true">
<aop:pointcut expression="execution(public * com.mk.dao.impl.*.*(..))" id="servicePointcut" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="servicePointcut" />
</aop:config>

二、@Transactional

（1）事务使用jdk接口动态代理

  暂无

（2）事务使用CGLIB类代理

需要设置spring的xml配置proxy-target-class="true"

<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />

1.大坑

@Transactional注解的类无法赋予继承的方法事务

如：

public abstract class Service<T extends Serializable,D extends Dao<T>> implements IService<T> {

protected D dao;

@Autowired
public void setDao(D dao) {
this.dao = dao;
}

//@Transactional
@Override
public T get(Integer id) {

if(Utils.isNull(id))
return null;

return dao.get(id);
}
}

@Transactional
@org.springframework.stereotype.Service
public class UserService extends Service<User, UserDao> {

}

即在调用UserService的get方法时会抛出No Session found for current thread异常

2.中坑

@Transactional注解在接口或接口的方法，事务失效，CGLIB无法从继承中获取Transactional注解在

3.小坑

@Transactional注解在public方法才有效，其他protected等方法都不起事务作用