How to implement a simple student course evaluation results analysis system in Java?

With the popularity of the Internet, more and more students and teachers are beginning to use online course evaluation systems to collect and analyze course feedback. This article will introduce how to use Java to write a simple student course evaluation results analysis system.

1. Determine the requirements of the system

Before you start writing the system, you need to determine the main requirements of the system. A typical student course evaluation system should include the following functions:

(1) Student and teacher account management

(2) Editing and publishing evaluation forms

(3) Online Fill out the evaluation form

(4)Collect and store evaluation data

(5)Data analysis and visual display

2. Create Java project

Create a new Java project in Eclipse or other Java IDE. Select Java SE 1.8 or higher as the Java version required for your project. Create a directory structure as shown below in the project folder:

• src

  • entity (entity class)
  • dao (data access Object)
  • service (service layer)
  • controller (control layer)
  • util (tool class)

3. Design database

Create a new database in MySQL or other relational database, and design the data table as shown below:

• student (student account )
• teacher (teacher account)
• course (course)
• evaluation (evaluation form)
• result (evaluation result)

4. Writing Entity Class

The entity class is a Java class that represents the data table. Create the following entity class in the entity package:

• Student
• Teacher
• Course
• Evaluation
• Result

Each entity class should contain properties, getter and setter methods, and toString methods that correspond to the corresponding fields in the database table.

5. Create Data Access Object

Data Access Object (DAO) is the bridge between Java code and database. Create the following DAO class in the dao package:

• StudentDao
• TeacherDao
• CourseDao
• EvaluationDao
• ResultDao

Each DAO class should contain methods such as insert, update, delete and query data.

6. Writing service layer and control layer

The service layer is used to encapsulate business logic, and the control layer is used to process HTTP requests and responses. Create the following service class in the service package:

• StudentService
• TeacherService
• CourseService
• EvaluationService
• ResultService

Each service class should contain methods to implement specific business logic.

Create the following controller class in the controller package:

• StudentController
• TeacherController
• CourseController
• EvaluationController
• ResultController

Each controller class should contain methods for handling HTTP requests, calling service layer methods, and returning HTTP responses.

7. Writing tool classes

Create the following tool classes in the util package:

• DbUtil: Database connection tool class
• JsonUtil: JSON serialization and deserialization tool class

8. Test system

Compile the Java code and start the Web server to test whether the system can meet the prerequisites to all needs. You can use tools like Postman to send HTTP requests, or use a browser to test. The following is a sample HTTP request:

• GET /student/1: Get student information with ID 1
• PUT /student: Update student information
• POST /student ：Create a new student account
• DELETE /student/1：Delete the student account with ID 1
• GET /evaluation/1：Get the evaluation form information with ID 1
• POST /evaluation: Create a new evaluation form
• PUT /evaluation/1: Update the evaluation form with ID 1
• DELETE /evaluation/1: Delete the evaluation form with ID 1
• POST /result: Submit a new evaluation result

9. Deploy the system

Use a Web server such as Tomcat to deploy the system to the production environment , and use reverse proxy servers such as NGINX for load balancing and HTTPS certificate management.

Summary

Java is a programming language widely used in web development and is suitable for developing web applications of all sizes. The student course evaluation system is a practical online education application. This function can be easily implemented using Java writing system. Before writing the system, you should fully consider the system requirements and database design to avoid performance problems and security vulnerabilities.

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