基于Velocity的UML类图代码框架自动生成的设计与实现-计算机技术专业论文.docxVIP

摘 要 目前，在基于面向对象技术的软件开发领域内，UML 已经成为占主导地位的 标准建模语言。在实际的软件开发过程中也已经证实，基于 UML 模型的代码自 动生成相对于手工编写代码可以有效减少代码错误，增强代码与模型的一致性， 并且在提高软件架构抽象层次的基础上同时提高软件开发效率。 针对如何将 UML 类图描述的模型转换为程序代码框架的问题，本文分析对比 了当前主要的几种自动代码生成技术。在此基础上，提出了一种基于模板的由 UML 类图模型到代码框架自动生成的设计方案，并实现了基于 Velocity 模板引擎 的代码框架自动生成系统。该系统采用 XML 描述的面向业务对象的 UML 类图模 型作为代码框架生成的源模型，经过模型获取、模型代码映射、模板文件编写、 启动模板引擎等一系列步骤，完成从类图模型到代码框架的自动转换。代码框架 自动生成系统支持在业务模型变化后系统行为的快速变化和代码框架的自动生 成，从而在大幅度减少程序开发人员编写重复性代码框架的工作的同时提高代码 框架质量，进而提高开发效率。 然后，通过生成测试类图的代码框架，展示了本系统实际的代码框架生成效 果。并对测试结果、生成速度和模型与代码一致性进行了分析，证明了该系统实 现了设计目标，对软件开发确实具有积极作用。 最后，本文对代码框架自动生成的工作进行了总结，并对未来的发展方向进 行了展望。 关键词：模型 Velocity 代码框架生成 ABSTRACT Currently, in the field of software development based on object-oriented technology, UML has become the dominant standard modeling language. And it has also been confirmed by the actual software development process that compared with manual code writing, based on UML models, automatical code structure generation can effectively reduce code errors, enhance the consistency between the code and model, raise the abstraction level of software architecture, and meanwhile increase the efficiency of software development. Aiming at the problem that how to transform models described by UML class diagrams into the applicable code structure, this paper analyzes and compares some kinds of the current automatic code generation techniques. It first introduces several implementation ways of automatic code generation. On this basis, it designs and proposes a template-based method that automatically generates code structure from UML class diagrams, and then, based on this design, this paper presents and implements a Velocity-based code generation system. It employs business-oriented UML class diagram models described with XML as the source model, and after serials of steps such as obtaining class models, mapping from model to code structure, composing template documentation, and starting template engine, completes the automatic conversion from the class diagram models to t