Java开发网 - UML建模与数据库设计的问题

Topic: UML建模与数据库设计的问题

1.UML建模与数据库设计的问题	Copy to clipboard
Posted by: p96114 Posted on: 2003-02-27 21:16 在数据库系统中，我们在做UML的时候的某一个类，其数据都要存在数据库中，那么在设计数据库的时候我们又要照着类图又来一次吗？总之如何解决UML建模与数据库建模的关系！请多多指较！

2.Re:UML建模与数据库设计的问题 [Re: p96114]	Copy to clipboard
Posted by: fly2fire Posted on: 2003-02-28 09:22 如果你是用rose的话，我知道，是可以从类图导出相应数据库表，而且也可以直接写到数据库中。

3.Re:UML建模与数据库设计的问题 [Re: fly2fire]	Copy to clipboard
Posted by: p96114 Posted on: 2003-02-28 09:27 TO fly2fire 也就是说,我们在设计类图的时候,同时也要兼顾数据库的设计是吗?

4.Re:UML建模与数据库设计的问题 [Re: p96114]	Copy to clipboard
Posted by: floater Posted on: 2003-03-01 05:12 No, design db first.

5.Re:UML建模与数据库设计的问题 [Re: p96114]

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Posted by: chaos
Posted on: 2003-03-03 01:15

This is an O/R mapping like questions.
There are five strategies you can adopt :

1.Top-down: Start with an existing JavaBeans object model, develop a mapping that maps those objects to tables in your database, generate DDL to create your database, and then use a persistance API to persist those objects to that database.

2.Bottom-up: Start with an existing database schema, describe your database schema using using XML or some other meta-data representation, generate your JavaBeans object model, optionally add business logic to those objects, and use a persistence API to store and retrieve your objects.

3.Middle-out: Start with a meta-data description of your object model, generate your JavaBeans object model, generate DDL to create your dataBase, and use a persistence API to store and retrieve your objects.

4.Meet-in-the-middle: Start with an existing database schema and an existing JavaBeans object model, develop a mapping to map between the two, and use a persistence API to store and retrieve your objects.

5.Generic-object: Start with a meta-data description of your desired database schema, generate DDL to create your database, and use a persistence API to store and retrieve generic data objects, with values stored as a hash of name-value pairs, to and from your database.

6.Re:UML建模与数据库设计的问题 [Re: floater]	Copy to clipboard
Posted by: frenzieddragon Posted on: 2003-03-03 12:15 floater wrote: No, design db first. 我认为先做类图再考虑数据库设计好点。

7.Re:UML建模与数据库设计的问题 [Re: p96114]	Copy to clipboard
Posted by: HenryYu Posted on: 2003-03-04 09:32 这是一个普遍存在的问题，在rose中虽然支持数据库的设计，但是你会发现他烂得要死！所以我建议用powerdesigner来设计数据库，再把对应的实体类在rose中重新建立