mybatis-spring调整总结05_Injecting Mappers

mybatis-spring整合总结05_Injecting Mappers
Injecting Mappers
DAO除了手动使用SqlSessionDaoSupport或是SqlSessionTemplate之外,Mybatis-Spring提供了另外一种方法，使用代理工厂—MapperFactoryBean。它允许你直接将map接口注入到Service beans中去，而不用编写实现类(DAOImpl)。因为Mybatis-Spring会为你创建代理。
将mapper加入Spring的配置方法:

<bean id="userMapper" value="org.mybatis.spring.sample.mapper.UserMapper" /><property name="sqlSessionFactory" ref="sqlSessionFactory" /></bean>

MapperFactoryBean将自动创建一个实现了UserMapper的代理类并注入到应用中。因为是在运行时创建，所以Mapper必须是一个接口而不是实现类。

<bean id="fooService" ref="userMapper" /></bean>

public class FooServiceImpl implements FooService {private UserMapper userMapper;public void setUserMapper(UserMapper userMapper) {this.userMapper = userMapper;}public User doSomeBusinessStuff(String userId) {return this.userMapper.getUser(userId);}}

Mybatis-Spring将会管理事务的commit,rollback,close

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