作业5

阅读 Asg_RH 文档，按用例构建领域模型

• 按 Task2 要求，请使用工具 UMLet，截图格式务必是 png 并控制尺寸。
• 说明：请不要受 PCMEF 层次结构影响。你需要识别实体（E）和 中介实体（M，也称状态实体）
  • 在单页面应用（如 vue）中，E 一般与数据库构建有关， M 一般与 store 模式 有关
  • 在 java web 应用中，E 一般与数据库构建有关， M 一般与 session 有关
    

数据库建模(E-R 模型)

数据库脚本

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/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
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CREATE TABLE `hotel` (
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  `name` varchar(45) DEFAULT NULL,
  `location_code` int(11) NOT NULL,
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/*!40101 SET character_set_client = @saved_cs_client */;

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-- Dumping data for table `hotel`
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--
-- Table structure for table `location`
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DROP TABLE IF EXISTS `location`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
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CREATE TABLE `location` (
  `code` int(11) NOT NULL,
  `name` varchar(45) DEFAULT NULL,
  `hot` int(11) DEFAULT NULL,
  PRIMARY KEY (`code`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
/*!40101 SET character_set_client = @saved_cs_client */;

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/*!40101 SET @saved_cs_client     = @@character_set_client */;
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CREATE TABLE `reservation` (
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  `date` date DEFAULT NULL,
  `traveler_id` int(11) NOT NULL,
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  KEY `fk_reservation_traveler1_idx` (`traveler_id`),
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
/*!40101 SET character_set_client = @saved_cs_client */;

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--
-- Table structure for table `room`
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DROP TABLE IF EXISTS `room`;
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CREATE TABLE `room` (
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  `price` float DEFAULT NULL,
  `isVal` tinyint(4) DEFAULT NULL,
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  `hotel_id` int(11) NOT NULL,
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  KEY `fk_room_hotel1_idx` (`hotel_id`),
  CONSTRAINT `fk_room_hotel1` FOREIGN KEY (`hotel_id`) REFERENCES `hotel` (`id`),
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  `name` varchar(45) DEFAULT NULL,
  `address` varchar(45) DEFAULT NULL,
  `phone_number` int(11) DEFAULT NULL,
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/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
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-- Dump completed on 2018-04-28  15:09:57

数据库逻辑模型 与 领域模型 的异同

• 异
  • 领域模型主要是需求阶段产生的产物，通过对需求进行分析总结提炼出来的用以描述业务需求的概念性产物。
  • 数据库逻辑模型更偏向开发过程，考虑到了数据库层面真正要存储的表格等等，便于后续的程序设计。
• 同
  • 都将软件的概念类用图形化表示出来了，都展现了各个概念类的名字、属性以及彼此之间的关系。