注解：

controller

    @Autowiredprivate UserService userService;

service实体类

@Service("userService")@Autowiredprivate UserMapper userMapper;

mapper

@Repository

controller 接收数据
=> service 逻辑中转
=> dao 数据库查询
=> domain bean类映射
=>
service=>controller 返回数据

Controller层

@Autowired
private BlogService blogService;@RequestMapping(value = "/findAll", produces = "application/json;charset=utf-8")@ResponseBodypublic List<Good> findAll(){List<Good> list = goodService.findAll();return list;}

service层

interface 层

GoodService.java

public interface GoodService {List<Good> findAll();
}

impl中的实体类

GoodServiceImpl.java

@Service("goodService")public class GoodServiceImpl implements GoodService {@Autowiredprivate GoodDao goodDao;@Overridepublic List<Good> findAll() {return goodDao.findAll();}}

dao层

public interface GoodDao {@Select("select * from good")List<Good> findAll();
}

domain层

public class Good implements Serializable {.....
}