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How to analyze the object-oriented system analysis and design method of UML? aiming at this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Research on object-oriented system Analysis and Design method based on UML

This paper discusses the method of object-oriented system analysis and design based on UML, including static modeling and dynamic modeling, and puts forward a practical requirement analysis and modeling method based on UML, which uses activity diagram model to express business model, object diagram, state diagram and interaction diagram model to express system structural logic and behavior logic, and application example diagram to express system requirements. The process concept of requirement analysis and its modeling is discussed, and the development of open student status management system in colleges and universities is taken as a case demonstration.

Introduction

Before introducing UML object orientation, let's take a look at the UML concept. UML is a standardized language for compiling system blueprints, which can realize the visualization, description and construction of system models of various components of large-scale complex systems, as well as the establishment of various necessary documents. It is a well-defined, easy-to-express, powerful and universally applicable modeling language. The development of UML has made outstanding contribution to the development of software engineering.

UML supports the whole process of software development starting from requirements analysis. UML builds system models through three types of graphics: use case (UseCase) diagrams, static structure diagrams (object class diagrams, object diagrams, component diagrams, configuration diagrams) and dynamic behavior diagrams (sequence diagram, collaborative diagram, state diagram, activity diagram). These diagrams can realize the visualization of the system from different abstract angles.

The development of URM has gone through the following stages.

The initial stage is a joint action of experts, in which three OO (object-oriented) methodologists [8] combine their respective methods to form UML0.9.

The second stage is the joint action of the company. The "UML partner organization" composed of more than a dozen companies adds their opinions to UML to form UML1.0 and 1.1, and as a proposal to apply to OMG to become a modeling language specification.

The third stage is the revision and improvement under the control of OMG. OMG formally adopted UML1.1 as the modeling language specification in November 1997, then set up a task force to carry out continuous revision, and produced UML1.2, 1.3 and 1.4 versions, of which UML1.3 is the more important revision.

Currently in the stage of major revision of UML, the goal is to launch UML2.0 as a standard proposal to be submitted to ISO.

Characteristics of 1.UML

UML has the following characteristics:

(1) object-oriented. The main concepts of UML object-oriented technology provide a number of basic representation graphics and methods of model elements, which can express various object-oriented concepts simply and clearly.

(2) Visualization, strong ability to express. The logical model and implementation model of the system can be clearly represented by the model diagram of UML. It can be used for the modeling of various complex systems.

(3) independent of the process. UML is a system modeling language, independent of the development process.

(4) independent of programming language. The software system model established by UML can be realized by any kind of object-oriented programming such as Java, VC++, SmalltaIk and so on.

(5) easy to master and use. UML graphic structure is clear, modeling is simple and clear, and it is easy to master and use.

Using UML for system analysis and design can speed up the development process, improve code quality, and support dynamic business requirements. UML is suitable for system development of all sizes. It can promote software reuse, easily integrate existing systems, and effectively deal with various risks in development.

2.UML object-oriented Analysis and Design process

Using UML for object-oriented system analysis and design, the process usually consists of the following three parts:

(1) identify the use cases and roles of the system

First of all, carry on the requirement investigation to the project, according to the business flow chart and data flow chart of the project and the operators at all levels involved in the project, through analysis, identify all the use cases and roles in the system; then analyze the relationship between the roles and use cases in the system, and then use UML modeling tools to draw the use case diagram of the system, at the same time, outline the concept layer model of the system, and describe the concept layer class diagram and activity diagram with the help of UML modeling tools.

(2) conduct system analysis and extract classes

The task of system analysis is to find out all the requirements of the system and describe them, and to establish a specific domain model. The establishment of a domain model helps developers to examine use cases, extract classes from them, and describe the relationships between classes.

(3) system design, and design classes and their behaviors

The design stage consists of structural design and detailed design. ① architecture design is a high-level design, its task is to define packages (subsystems), including the dependency between packages and the main communication mechanisms. Packages help to describe the logical components of the system and the dependencies between them. The detailed design of ② is to refine the contents of the package, clearly describe all classes, and use UML's dynamic model to describe the behavior of instances of these classes in a specific environment.

This is the answer to the question on how to analyze the object-oriented system analysis and design method of UML. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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