MyBatis-Spring整合之方式3

通过注解整合

1.在UserDao同级目录下新建接口UserMapper，内容如下：

public interface UserMapper {

    @Select("select * from user")

    public List<User> selectUser();

}

2.新建service包，改写UserDao和其实现类为UserService类和其实现类，如下：

public interface UserService {

    public List<User> selectUser();

}

public class UserServiceImp implements UserService {

    private UserMapper userMapper;

    @Override

    public List<User> selectUser() {

        return userMapper.selectUser();

    }

    public void setUserMapper(UserMapper userMapper) {

        this.userMapper = userMapper;

    }

}

3.beans.xml新增bean标签、修改原UserDao标签，如下:

<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">

    <property name="mapperInterface" value="com.lxy.dao.UserMapper"/>

    <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>

</bean>

<bean id="userService" class="com.lxy.service.imp.UserServiceImp">

    <property name="userMapper" ref="userMapper"/>

</bean>

4.修改test为新的类型，如下：

public class test {

    public static void main(String[] args) throws IOException {

        ApplicationContext context=new ClassPathXmlApplicationContext("Beans.xml");

        UserService userService= (UserService) context.getBean("userService");

        System.out.println(userService.selectUser().size());

    }

}

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MyBatis-Spring整合之方式3

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