Using Java to build student information management module of online examination system

Using Java to build the student information management module of the online examination system

In modern education, with the development of information technology, online examination systems have gradually replaced the traditional paper-based examination system Quality examination has become the preferred tool for schools and institutions to conduct examinations. In order to realize the student information management function of the online examination system, we can use Java language for development.

This article will use a simple sample code to demonstrate how to use Java to build the student information management module of the online examination system. This module includes the functions of entering, querying, modifying and deleting student information.

First, we need to create a student class to store basic information of students, such as student number, name, age, etc. The code example is as follows:

public class Student {
    private String id;
    private String name;
    private int age;

    // 构造方法
    public Student(String id, String name, int age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    // Getter和Setter方法
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

Next, we need to create a student information management class to manage student information. This class includes operations such as adding, querying, modifying, and deleting student information. The code example is as follows:

import java.util.ArrayList;
import java.util.List;

public class StudentManager {
    private List<Student> students;

    public StudentManager() {
        students = new ArrayList<>();
    }

    // 添加学生信息
    public void addStudent(Student student) {
        students.add(student);
    }

    // 查询学生信息
    public Student getStudentById(String id) {
        for (Student student : students) {
            if (student.getId().equals(id)) {
                return student;
            }
        }
        return null;
    }

    // 修改学生信息
    public void updateStudent(Student student) {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getId().equals(student.getId())) {
                students.set(i, student);
                break;
            }
        }
    }

    // 删除学生信息
    public void deleteStudent(String id) {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getId().equals(id)) {
                students.remove(i);
                break;
            }
        }
    }
}

When using the student information management module, we can implement the addition, deletion, modification, and query functions of student information by creating student objects and calling corresponding methods. The following is a usage example:

public class Main {
    public static void main(String[] args) {
        // 创建学生信息管理对象
        StudentManager studentManager = new StudentManager();
        
        // 添加学生信息
        Student student1 = new Student("001", "张三", 18);
        studentManager.addStudent(student1);
        
        // 查询学生信息
        Student student = studentManager.getStudentById("001");
        System.out.println("学号：" + student.getId());
        System.out.println("姓名：" + student.getName());
        System.out.println("年龄：" + student.getAge());
        
        // 修改学生信息
        student.setAge(19);
        studentManager.updateStudent(student);
        
        // 删除学生信息
        studentManager.deleteStudent("001");
    }
}

Through the above code example, we can use Java language to build the student information management module of the online examination system. This module can easily enter, query, modify and delete student information, and provides basic functional support for the development of online examination systems. Of course, the actual online examination system also needs to be integrated with other modules to achieve complete functionality.

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