学生信息管理系统 java

学生信息管理系统是一个非常典型的 Java 项目，适合初学者练手。以下是一个简单的学生信息管理系统的实现：

1. 学生信息类

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

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

    // getter and setter methods
}

2. 学生信息管理类

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

public class StudentManager {
    private List<Student> students;

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

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

    public void removeStudent(String id) {
        for (Student student : students) {
            if (student.getId().equals(id)) {
                students.remove(student);
                break;
            }
        }
    }

    public Student findStudent(String id) {
        for (Student student : students) {
            if (student.getId().equals(id)) {
                return student;
            }
        }
        return null;
    }

    public List<Student> getAllStudents() {
        return students;
    }
}

3. 用户界面类

import java.util.Scanner;

public class StudentUI {
    private StudentManager manager;

    public StudentUI() {
        manager = new StudentManager();
    }

    public void start() {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("1. Add student");
            System.out.println("2. Remove student");
            System.out.println("3. Find student");
            System.out.println("4. List all students");
            System.out.println("0. Exit");

            int option = scanner.nextInt();
            if (option == 0) {
                break;
            }
            switch (option) {
                case 1:
                    System.out.println("Enter name:");
                    String name = scanner.next();
                    System.out.println("Enter id:");
                    String id = scanner.next();
                    System.out.println("Enter gender:");
                    String gender = scanner.next();
                    System.out.println("Enter age:");
                    int age = scanner.nextInt();
                    System.out.println("Enter major:");
                    String major = scanner.next();
                    manager.addStudent(new Student(name, id, gender, age, major));
                    break;
                case 2:
                    System.out.println("Enter student id:");
                    String removeId = scanner.next();
                    manager.removeStudent(removeId);
                    break;
                case 3:
                    System.out.println("Enter student id:");
                    String findId = scanner.next();
                    Student student = manager.findStudent(findId);
                    if (student == null) {
                        System.out.println("Student not found");
                    } else {
                        System.out.println(student);
                    }
                    break;
                case 4:
                    for (Student s : manager.getAllStudents()) {
                        System.out.println(s);
                    }
                    break;
                default:
                    System.out.println("Invalid option");
                    break;
            }
        }
    }

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

这个简单的学生信息管理系统可以实现添加、删除、查找和列出所有学生的功能。在实际开发中，还需要考虑数据的持久化、用户权限控制等问题。