Class Diagram for Online Shopping System

A UML class diagram for online shopping system is used to represent, explain, and document the parts (classes) of an online shopping system. It can also be a reference or way to create executable software code. Class diagrams provide an overview of the online shopping’s classes, functions, and relationships.

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Project Overview

Name:Online Shopping System Class Diagram
UML Diagram:Class Diagram
Users:Admin, Sellers, and Buyers
Tools Used:Diagraming Tools that have UML Class Diagram Symbols
Class Diagram Online Shopping System: Overview

What is an Online Shopping?

Online shopping is the same as e-commerce software which also provides functions similar to e-commerce. This kind of platform enables customers to shop online by browsing their sites or mobile apps. It also provide a page that displays different kinds of shopping products.

Additionally, this also allows sellers to display their goods on their sites and sell their products. In short, the online shopping system involves products, customers, and sellers doing their trading online.

What is a Class Diagram?

A UML class diagram for online shopping is crucial and useful for system development. This is because the class diagrams are very effective in showing the system’s structure in detail, including the structures of each class. This works best with other Online Shopping System UML Diagrams.

Additionally, the class diagram blueprints show how things in the system work and are related. It also shows the system’s activities and the services it provides. Therefore, a class diagram defines the physical components of a system and can directly relate to object-oriented languages.

Online Shopping System UML Class Diagram

This simple class diagram for online shopping gives you the exact details about the system’s class characteristics and methods. It also clarifies the connections of classes in the system.

Here, I will be showing you the sample constructed class diagram provided with its attributes and methods. This is constructed with the simple idea derived from the common function of online shopping.

UML Class Diagram for Online Shopping System
Class Diagram Online Shopping System in UML

The illustration shows a simple idea of how the class diagram works. It resembles a flowchart in which classes are shown in boxes with three rectangles in each. The top rectangle has the class’s name; the middle holds the class’s properties, and the bottom contains the class’s methods.

The classes identified for Online Shopping System were the itemscustomerseller, order, delivery, and transaction. Their roles are in the middle part and called their attributes. The function of each class is in its’ methods.

You can edit this diagram and it is up to you how will you create your class diagram. However, you need to be precise with your information and consider the decisions included.

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How to Draw a Class Diagram?

Time needed: 5 minutes

Steps in creating Class Diagram for Online Shopping System.

  • Step 1: Familiarize Class Diagram Components

    Class Diagram Components are used to create class diagrams. They should be familiarized before you build the class diagram.

    To plot the class diagram you will need the class name, its attributes, methods, and their access (visibility). You will base the diagram on the evaluated information to have the exact Class Diagram.

  • Step 2: Determine the targeted users

    Classes are the main part of the diagram and it is presented in a box with three main partitions. It should be declared properly because it could be converted to codes.

  • Step 3: Analyze the activities included

    Attributes of a class should be placed in the middle part of a class. They were then assigned visibility symbols. This visibility has something to do with the codes.

    The operations will be placed at the bottom of a class and represent the functions of a class within a system.

  • Step 4: Plot the Class Diagram

    To map the relationship between the classes, you also need to know the meaning of the symbols at the end of each line that connects them. The ends represent different meanings and relations between two or more classes.


The class diagram is a modeled diagram that explains systems classes and relationships. It can depict the names and attributes of classes, as well as their links and methods that make up the software.

Moreover, the class diagram is the most essential type of UML diagram and is critical in software development. It is an approach to showing the system’s structure in detail and part by part.


If you have inquiries or suggestions about the Class Diagram discussion, just leave us your comments below. We would be glad to hear to concerns and be part of your learning.

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