基于java的学生管理系统

基于Java的学生管理系统通常包含基本的增删改查功能。下面是一个简单的示例：

import java.util.ArrayList;
import java.util.Scanner;

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

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

    public String getName() {
        return name;
    }

    public int getAge {
        return age;
    }

    public String getId() {
        return id;
    }
}

class StudentManagementSystem {
    private ArrayList<Student> students;

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

    public void addStudent(Student student) {
        students.add(student);
    }

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

    public void updateStudent(String id, Student newStudent) {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getId().equals(id)) {
                students.set(i, newStudent);
                break;
            }
        }
    }

    public void searchStudent(String id) {
        for (Student student : students) {
            if (student.getId().equals(id)) {
                System.out.println("Name: " + student.getName());
                System.out.println("Age: " + student.getAge());
                System.out.println("ID: " + student.getId());
                break;
            }
        }
    }
}

public class Main {
    public static void main(String[] args) {
        StudentManagementSystem sms = new StudentManagementSystem();
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("请选择操作：");
            System.out.println("1. 添加学生");
            System.out.println("2. 删除学生");
            System.out.println("3. 修改学生信息");
            System.out.println("4. 查找学生");
            System.out.println("0. 退出");

            int choice = scanner.nextInt();
            scanner.nextLine(); // 清空输入缓冲区

            switch (choice) {
                case 1:
                    System.out.println("请输入学生姓名：");
                    String name = scanner.nextLine();
                    System.out.println("请输入学生年龄：");
                    int age = scanner.nextInt();
                    scanner.nextLine(); // 清空输入缓冲区
                    System.out.println("请输入学生学号：");
                    String id = scanner.nextLine();
                    Student newStudent = new Student(name, age, id);
                    sms.addStudent(newStudent);
                    System.out.println("添加成功！");
                    break;
                case 2:
                    System.out.println("请输入要删除的学生学号：");
                    String deleteId = scanner.nextLine();
                    sms.deleteStudent(deleteId);
                    System.out.println("删除成功！");
                    break;
                case 3:
                    System.out.println("请输入要修改的学生学号：");
                    String updateId = scanner.nextLine();
                    System.out.println("请输入新的学生姓名：");
                    String newName = scanner.nextLine();
                    System.out.println("请输入新的学生年龄：");
                    int newAge = scanner.nextInt();
                    scanner.nextLine(); // 清空输入缓冲区
                    System.out.println("请输入新的学生学号：");
                    String newId = scanner.nextLine();
                    Student updatedStudent = new Student(newName, newAge, newId);
                    sms.updateStudent(updateId, updatedStudent);
                    System.out.println("修改成功！");
                    break;
                case 4:
                    System.out.println("请输入要查找的学生学号：");
                    String searchId = scanner.nextLine();
                    sms.searchStudent(searchId);
                    break;
                case 0:
                    System.exit(0);
                    break;
                default:
                    System.out.println("无效的选择！");
                    break;
            }
        }
    }
}