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This article mainly shows you "how to apply UML technology in the application system of Web". The content is simple and clear. I hope it can help you solve your doubts. Let me lead you to study and learn this article "how to apply UML technology in Web application system".

Application of UML Technology in Web-based Application system

1. Introduction

The development of Web technology makes the development of management system more convenient and powerful, Web technology plays a skeleton supporting role in the development process of this system, at the same time, the development of component technology provides convenience for the openness and integration of the system, and the effective and reasonable introduction of component technology is a direction of the current development and development of Web system. Through the modeling of the development of the system, the visual graphical representation can show the flow and function of the system. Choosing an effective modeling method, making full use of Web technology and component technology, improving the efficiency of software development and improving the reliability and maintainability of the software are the issues that every software developer is concerned about.

UML (UnifiedModelingLanguage) is a standard modeling language based on object technology. Its well-defined, easy to express and powerful features make it more advantageous in object-oriented analysis and design. In the system modeling based on Web technology and component technology, its perfect component modeling idea and visual modeling advantages are more beneficial for system developers to understand program flow and function, and further improve the development efficiency of Web system and the reusability and repairable of Web components.

Combined with the modeling of project approval process in our self-developed piston PDM system, this paper introduces the application of UML technology in system modeling based on WEB technology and component technology.

2. The structure of application system based on Web

For the application system based on Web technology, the user directly faces the client browser. When using the system, the transaction logic processing after the request and the logical operation of the data are completed by the server and the database system, which is completely transparent to the user. The result obtained after the operation is returned to the user through the browser. This process can be divided into several sub-steps, and the completion of each sub-step can be understood as being handled by a separate application server, which will also exchange and transfer some data with each other before finally getting the conclusion that the user needs. Figure 1 is a schematic diagram of the application structure of Web.

With the development of Web application technology, there will be corresponding improvements or supplements in the interpretation of Web data flow.

3. UML modeling method of Web application system.

Pages, scripts, forms and frames are the key parts of Web application system. The key to the modeling of data flow is to use UML technology to model the application and relationship of the above Web elements. Here is a brief introduction to the modeling representation of these elements.

(1) Page modeling. When users use the Web application system, they operate the system through the page. In page modeling, two category templates "ClientPage" and "SeverPage" can be used to represent client-side pages and server-side pages, respectively. The property of the client page is the variable defined in the scope of the page, the method is the function in the page script; the property of the server page is the variable in the page script, and the method is the function defined in the script. When using page information transmission, there may also be a redirection of the server page, which is represented by the category template "redirect" in UML modeling; the construction association between the client page and the server page is represented by the category template "bulid", which is an one-way association, pointing from the server page to the client page, as shown in figure 2.

In Web application systems, hyperlinks are also often used. In UML modeling, hyperlinks are represented by category template "link", and its parameters are simulated as link attributes.

(2) form modeling. User requirements generally interact with the database through forms. In UML modeling, the form is represented by the category template "form", the attribute is the field in the form, and the form has no method. When the form processes the request, it exchanges data with the Web page, which is done with the submit button submit, and in order to represent this relationship in modeling, it is represented by the category template "submit".

(3) component modeling. In the modeling of Web application system using component technology, component modeling is an important link. In the basic graphical modeling elements of UML, a special component diagram is set up. In the process of using components, they are also divided into client components (such as JavaApplet,ActiveX controls) and server-side components. In the UML modeling representation of the system, the category template "ClientComponent" is used to represent the client component and the "SeverComponent" is used to represent the server component.

(4) frame modeling. The framework is implemented by defining the category template element "frameset". Frameset specifies and names each frame, each frame holds a page; the use of the framework also involves the target target, which is represented by "target" when modeling.

The above is all the contents of this article entitled "how to apply UML Technology in Web Application system". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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