Object-Oriented Requirements Modeling Based On UML

Today, the information systems have become increasingly complex, multiplex and interactional. The traditional function-oriented methods of development cannot fit in with the complexity and inconstant requirements, and the result of analysis and design cannot be reused effectively. By comparison, object-oriented modeling technique is flexible, reusable and can reduce the risk of development because it makes the complexity and changeability in control. So object-oriented technique can improve the affectivity of software development. And Unified Modeling Language is a standard language for specifying, visualizing, constructing, and documenting the artifacts of object-oriented software systems. So the transformation from function-oriented methods to object-oriented methods is inevitable.Requirements Engineering is developed with the development of the computer, and in the early days of the development of the computer, the software scale is not very large, so requirements analysis is not thought so much. With the development of the computer, the lager the software system scale is, the more important requirements analysis and definition are in the whole software development process, and requirements analysis and definition are in the whole software development life cycle. Object-Oriented Requirements Modeling Based on UML is the main research direction in the paper.Firstly, the paper describes the actuality and the content of requirements engineering, points out the questions those are in requirements engineering, and gives the resolvent to it. Secondly, it analyses the object-oriented modeling technology, extracts the idea of the key technique. Thirdly, UML is briefly described. Lastly, it brings forward object-oriented requirements modeling based on UML. To demonstrate the viability of the approach, it takes an example.