用JAVA写一个教材管理系统

好的，一个教材管理系统应该包括以下功能：

1. 登录：管理员和教师应该可以登录系统。

2. 教材管理：管理员可以添加、编辑和删除教材，也可以查看所有的教材。

3. 教师管理：管理员可以添加、编辑和删除教师，也可以查看所有的教师。

4. 分配教材：管理员可以分配教材给教师。

5. 借还教材：教师可以借阅教材并归还给管理员。

6. 教材查询：教师和管理员可以查询教材信息。

基于以上功能，下面是一个简单的JAVA代码，可以实现教材管理系统：

import java.util.*;

// 教材类
class Textbook {
    private String name;
    private String author;
    private int quantity;

    public Textbook(String name, String author, int quantity) {
        this.name = name;
        this.author = author;
        this.quantity = quantity;
    }

    public String getName() {
        return name;
    }

    public String getAuthor() {
        return author;
    }

    public int getQuantity() {
        return quantity;
    }

    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }
}

// 教师类
class Teacher {
    private String name;
    private String id;

    public Teacher(String name, String id) {
        this.name = name;
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public String getId() {
        return id;
    }
}

// 教材管理系统类
public class TextbookManagementSystem {
    private static Map<String, Textbook> textbooks = new HashMap<String, Textbook>();
    private static Map<String, Teacher> teachers = new HashMap<String, Teacher>();

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

        while (true) {
            System.out.println("请输入操作：1.登录 2.退出");
            int operation = scanner.nextInt();

            if (operation == 1) {
                System.out.println("请输入用户名和密码：");
                String username = scanner.next();
                String password = scanner.next();

                if (username.equals("admin") && password.equals("123456")) {
                    System.out.println("管理员登录成功！");
                    adminOperation(scanner);
                } else {
                    System.out.println("教师登录成功！");
                    teacherOperation(scanner);
                }
            } else {
                break;
            }
        }

        scanner.close();
    }

    // 管理员操作
    public static void adminOperation(Scanner scanner) {
        while (true) {
            System.out.println("请输入操作：1.添加教材 2.编辑教材 3.删除教材 4.查看教材 5.添加教师 6.编辑教师 7.删除教师 8.查看教师 9.分配教材 10.退出");
            int operation = scanner.nextInt();

            switch (operation) {
                case 1:
                    addTextbook(scanner);
                    break;
                case 2:
                    editTextbook(scanner);
                    break;
                case 3:
                    deleteTextbook(scanner);
                    break;
                case 4:
                    viewTextbooks();
                    break;
                case 5:
                    addTeacher(scanner);
                    break;
                case 6:
                    editTeacher(scanner);
                    break;
                case 7:
                    deleteTeacher(scanner);
                    break;
                case 8:
                    viewTeachers();
                    break;
                case 9:
                    assignTextbook(scanner);
                    break;
                case 10:
                    return;
                default:
                    System.out.println("输入有误，请重新输入！");
                    break;
            }
        }
    }

    // 教师操作
    public static void teacherOperation(Scanner scanner) {
        while (true) {
            System.out.println("请输入操作：1.借阅教材 2.归还教材 3.查询教材 4.退出");
            int operation = scanner.nextInt();

            switch (operation) {
                case 1:
                    borrowTextbook(scanner);
                    break;
                case 2:
                    returnTextbook(scanner);
                    break;
                case 3:
                    queryTextbook(scanner);
                    break;
                case 4:
                    return;
                default:
                    System.out.println("输入有误，请重新输入！");
                    break;
            }
        }
    }

    // 添加教材
    public static void addTextbook(Scanner scanner) {
        System.out.println("请输入教材名称、作者和数量：");
        String name = scanner.next();
        String author = scanner.next();
        int quantity = scanner.nextInt();

        if (textbooks.containsKey(name)) {
            System.out.println("该教材已存在！");
        } else {
            textbooks.put(name, new Textbook(name, author, quantity));
            System.out.println("添加成功！");
        }
    }

    // 编辑教材
    public static void editTextbook(Scanner scanner) {
        System.out.println("请输入教材名称：");
        String name = scanner.next();

        if (!textbooks.containsKey(name)) {
            System.out.println("该教材不存在！");
        } else {
            Textbook textbook = textbooks.get(name);

            System.out.println("请输入新的教材名称、作者和数量：");
            String newName = scanner.next();
            String author = scanner.next();
            int quantity = scanner.nextInt();

            textbooks.remove(name);
            textbooks.put(newName, new Textbook(newName, author, quantity));
            System.out.println("编辑成功！");
        }
    }

    // 删除教材
    public static void deleteTextbook(Scanner scanner) {
        System.out.println("请输入教材名称：");
        String name = scanner.next();

        if (!textbooks.containsKey(name)) {
            System.out.println("该教材不存在！");
        } else {
            textbooks.remove(name);
            System.out.println("删除成功！");
        }
    }

    // 查看教材
    public static void viewTextbooks() {
        for (Textbook textbook : textbooks.values()) {
            System.out.println("教材名称：" + textbook.getName() + "，作者：" + textbook.getAuthor() + "，数量：" + textbook.getQuantity());
        }
    }

    // 添加教师
    public static void addTeacher(Scanner scanner) {
        System.out.println("请输入教师姓名和工号：");
        String name = scanner.next();
        String id = scanner.next();

        if (teachers.containsKey(id)) {
            System.out.println("该教师已存在！");
        } else {
            teachers.put(id, new Teacher(name, id));
            System.out.println("添加成功！");
        }
    }

    // 编辑教师
    public static void editTeacher(Scanner scanner) {
        System.out.println("请输入教师工号：");
        String id = scanner.next();

        if (!teachers.containsKey(id)) {
            System.out.println("该教师不存在！");
        } else {
            Teacher teacher = teachers.get(id);

            System.out.println("请输入新的教师姓名：");
            String name = scanner.next();

            teacher = new Teacher(name, id);
            teachers.put(id, teacher);
            System.out.println("编辑成功！");
        }
    }

    // 删除教师
    public static void deleteTeacher(Scanner scanner) {
        System.out.println("请输入教师工号：");
        String id = scanner.next();

        if (!teachers.containsKey(id)) {
            System.out.println("该教师不存在！");
        } else {
            teachers.remove(id);
            System.out.println("删除成功！");
        }
    }

    // 查看教师
    public static void viewTeachers() {
        for (Teacher teacher : teachers.values()) {
            System.out.println("教师姓名：" + teacher.getName() + "，工号：" + teacher.getId());
        }
    }

    // 分配教材
    public static void assignTextbook(Scanner scanner) {
        System.out.println("请输入教师工号和教材名称：");
        String id = scanner.next();
        String name = scanner.next();

        if (!teachers.containsKey(id)) {
            System.out.println("该教师不存在！");
        } else if (!textbooks.containsKey(name)) {
            System.out.println("该教材不存在！");
        } else {
            Teacher teacher = teachers.get(id);
            Textbook textbook = textbooks.get(name);

            System.out.println("请输入分配数量：");
            int quantity = scanner.nextInt();

            if (textbook.getQuantity() < quantity) {
                System.out.println("库存不足！");
            } else {
                textbook.setQuantity(textbook.getQuantity() - quantity);
                System.out.println("分配成功！");
            }
        }
    }

    // 借阅教材
    public static void borrowTextbook(Scanner scanner) {
        System.out.println("请输入教材名称：");
        String name = scanner.next();

        if (!textbooks.containsKey(name)) {
            System.out.println("该教材不存在！");
        } else {
            Textbook textbook = textbooks.get(name);

            System.out.println("请输入借阅数量：");
            int quantity = scanner.nextInt();

            if (textbook.getQuantity() < quantity) {
                System.out.println("库存不足！");
            } else {
                textbook.setQuantity(textbook.getQuantity() - quantity);
                System.out.println("借阅成功！");
            }
        }
    }

    // 归还教材
    public static void returnTextbook(Scanner scanner) {
        System.out.println("请输入教材名称：");
        String name = scanner.next();

        if (!textbooks.containsKey(name)) {
            System.out.println("该教材不存在！");
        } else {
            Textbook textbook = textbooks.get(name);

            System.out.println("请输入归还数量：");
            int quantity = scanner.nextInt();

            textbook.setQuantity(textbook.getQuantity() + quantity);
            System.out.println("归还成功！");
        }
    }

    // 查询教材
    public static void queryTextbook(Scanner scanner) {
        System.out.println("请输入教材名称：");
        String name = scanner.next();

        if (!textbooks.containsKey(name)) {
            System.out.println("该教材不存在！");
        } else {
            Textbook textbook = textbooks.get(name);

            System.out.println("教材名称：" + textbook.getName() + "，作者：" + textbook.getAuthor() + "，数量：" + textbook.getQuantity());
        }
    }
}

以上是一个基本的教材管理系统，可以根据具体需求进行修改和扩展。