类图设计缺陷的检测研究-软件工程专业毕业论文.docxVIP

摘要摘要 摘要 摘要 软件开发过程中，设计质量的优劣直接影响到软件的质量，软件设计质量可 以通过度量进行评价。本文根据面向对象设计原则，将面向对象软件设计中的一 些质量特征进行量化，运用面向对象度量及检测规则，生成检测过程，检测软件 设计过程中可能存在的一些设计缺陷，并提出类图存在设计缺陷的原因及改进意 见，从而进一步优化类图。 本文首先研究和归纳了面向对象设计中常见的设计缺陷，从检测原理、检测 装置及阈值调整三方面阐述了设计缺陷检测策略，在此基础上，进一步阐述了构 建检测策略的步骤。 为了检测设计缺陷，提出了类设计缺陷检测模型CDFDM(Class Design Flaws Detection Model)，它形式化地描述了面向对象设计原则及其特征，并进一步引 出了设计质量特征、度量指标及度量方法等关键元素及其关系，结合检测策略， 给出TCDFDM模型的检测机制。CDFDM模型运用度量技术将设计缺陷的质量特征量 化为度量指标，为每个度量指标选择检测装置，并设定相应阈值，从而形成设计 缺陷检测规则，以此识别设计实例中存在的设计缺陷，导出检测过程，最后输出 检测结果。 基于CDFDM模型，设计并实现相应的检测工具，它可以帮助设计人员分析面 向对象设计，了解软件项目的复杂度；CDFDMI具分为度量指标的计算、检测规 则的合成以及设计缺陷识别三部分，本文详细介绍了这三部分的设计与实现，并 应用实际项目中的设计实例验证了CDFDM工具的有效性。最后对本文的工作进行 了总结并提出了未来的工作方向。 关键词：设计原则、软件度量、设计缺陷、缺陷检测 AbstractAbstract Abstract Abstract In software development process，software quality is directly influenced by design quality which is evaluated by metric．According to object oriented design principIes(00DP)，with quantify quality feature in object-oriented software design， the detection process is generated while some design flaws is detected in software design through 00 metric and detection rule；Finally，The reasons of class design flow as well as improving advice are also described to optimize class diagram． Firstly，common design flaws are summarized and detection strategy is described of three aspects，detection theory,detection mechanism and threshold adjustment．Moreover，the steps of detection strategy are introduced in the paper． In order to detect design flaws，Class Design Flaws Detection Model(CDFDM)is proposed which formally describe the key elements and its relation，including OODP and its feature，design quality feature，metric indictor and metric method which are derived from OODP．With detection strategy，a detection mechanism is proposed in CDFDM．Metric technologies which quantify design quality to indictors are used in CDFDM，a filter is selected，and a threshold value is set for each indictor to generate design flaws detection rule，moreover,detection process is generated and design flaw is ind