Java编写一个学生管理系统

这里提供一个简单的学生管理系统的Java代码，实现了添加学生、删除学生、查找学生和打印学生列表等基本功能：

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

public class StudentManagementSystem {
    private ArrayList<Student> students = new ArrayList<>();

    public void start() {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请输入操作编号：");
            System.out.println("1. 添加学生");
            System.out.println("2. 删除学生");
            System.out.println("3. 查找学生");
            System.out.println("4. 打印学生列表");
            System.out.println("0. 退出");

            int choice = scanner.nextInt();

            if (choice == 0) {
                break;
            }

            switch (choice) {
                case 1:
                    addStudent();
                    break;
                case 2:
                    deleteStudent();
                    break;
                case 3:
                    findStudent();
                    break;
                case 4:
                    printStudents();
                    break;
                default:
                    System.out.println("请输入正确的操作编号！");
                    break;
            }
        }
    }

    private void addStudent() {
        Scanner scanner = new Scanner(System.in);
        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();
        System.out.println("请输入学生性别（男/女）：");
        String gender = scanner.next();
        System.out.println("请输入学生班级：");
        String clazz = scanner.next();
        Student student = new Student(name, age, gender, clazz);
        students.add(student);
        System.out.println("添加成功！");
    }

    private void deleteStudent() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要删除的学生姓名：");
        String name = scanner.nextLine();
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getName().equals(name)) {
                students.remove(i);
                System.out.println("删除成功！");
                return;
            }
        }
        System.out.println("没有找到要删除的学生！");
    }

    private void findStudent() {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要查找的学生姓名：");
        String name = scanner.nextLine();
        for (Student student : students) {
            if (student.getName().equals(name)) {
                System.out.println(student);
                return;
            }
        }
        System.out.println("没有找到要查找的学生！");
    }

    private void printStudents() {
        if (students.size() == 0) {
            System.out.println("当前没有学生信息！");
        } else {
            for (Student student : students) {
                System.out.println(student);
            }
        }
    }

    public static void main(String[] args) {
        StudentManagementSystem system = new StudentManagementSystem();
        system.start();
    }
}

class Student {
    private String name;
    private int age;
    private String gender;
    private String clazz;

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

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public String getGender() {
        return gender;
    }

    public String getClazz() {
        return clazz;
    }

    @Override
    public String toString() {
        return "学生姓名：" + name + "，年龄：" + age + "，性别：" + gender + "，班级：" + clazz;
    }
}

使用时，可以直接运行 `StudentManagementSystem` 类即可。