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介绍了一种可视化的建模工具———统一建模语言 (UML) ,阐述了它的显著特点以及可视化的建模方法 ,并以大坝安全辅助决策系统为例 ,在分析了该系统功能需求的基础上 ,运用统一建模语言建立了该系统的静态模型 (用例图、包图 )和动态模型 (活动图、顺序图 ) ,这些模型将有利于开发人员有效地对目标系统进行需求分析、系统设计、源程序自动生成 ,以及通过逆向工程返回到分析设计阶段 ,使系统能适应需求变化的要求 ,从而缩短软件开发周期 ,提高大坝安全辅助决策系统的质量。
This paper introduces a visual modeling tool --- Unified Modeling Language (UML), expounds its salient features and visual modeling methods. Taking dam safety decision support system as an example, this paper analyzes the function of the system Based on the requirements, the static model (use case diagram, package diagram) and dynamic model (activity diagram, sequence diagram) of the system are established by using Unified Modeling Language. These models will help developers effectively analyze the requirements of the target system , System design, automatic generation of source code, and reverse engineering to return to the analysis and design phase, the system can adapt to the requirements of changing requirements, thereby shortening the software development cycle and improving the quality of dam safety decision support system.