添加 'src/Main'

src/Main

@@ -0,0 +1,253 @@
+import java.io.*;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+public class Main {
+    private static String[][] USERS = {
+            {"张三1", "123", "小学"},
+            {"张三2", "123", "小学"},
+            {"张三3", "123", "小学"},
+            {"李四1", "123", "初中"},
+            {"李四2", "123", "初中"},
+            {"李四3", "123", "初中"},
+            {"王五1", "123", "高中"},
+            {"王五2", "123", "高中"},
+            {"王五3", "123", "高中"}
+    };
+
+    private static Scanner scanner = new Scanner(System.in);
+    private static String currentUserName = null;
+    private static String currentUserType = null;
+    private static QuestionGenerator questionGenerator = null; // 添加题目生成器实例
+
+    public static void main(String[] args) {
+        startSystem();
+    }
+
+    private static void startSystem() {
+        while (true) {
+            System.out.println("===中小学数学卷子自动生成程序===");
+            System.out.println("1.登录");
+            System.out.println("2.退出系统");
+
+            String input = scanner.nextLine().trim();
+            switch (input) {
+                case "1":
+                    if (loginIn()) {
+                        startQuestionGeneration();
+                    }
+                    break;
+                case "2":
+                    System.out.println("感谢使用，再见！");
+                    scanner.close();
+                    return;
+                default:
+                    System.out.println("请输入有效指令");
+                    break;
+            }
+        }
+    }
+
+    private static boolean loginIn() {
+        System.out.println("请输入用户名和密码(用空格隔开)");
+        while (true) {
+            String input = scanner.nextLine().trim();
+            String[] parts = input.split(" ");
+
+            if (parts.length < 2) {
+                System.out.println("输入格式错误，请重新输入:");
+                continue;
+            }
+
+            for (String[] USER : USERS) {
+                if (parts[0].equals(USER[0]) && parts[1].equals(USER[1])) {
+                    currentUserName = USER[0];
+                    currentUserType = USER[2];
+                    System.out.println("当前选择为" + currentUserType + "出题");
+
+                    // 根据用户类型创建对应的题目生成器实例
+                    questionGenerator = createQuestionGenerator(currentUserType);
+                    return true;
+                }
+            }
+            System.out.println("请输入正确的用户名和密码");
+        }
+    }
+
+    // 工厂方法：根据用户类型创建对应的题目生成器
+    private static QuestionGenerator createQuestionGenerator(String userType) {
+        switch (userType) {
+            case "小学":
+                return new PrimaryQuestionGenerator();
+            case "初中":
+                return new JuniorQuestionGenerator();
+            case "高中":
+                return new SeniorQuestionGenerator();
+            default:
+                return new PrimaryQuestionGenerator();
+        }
+    }
+
+    private static void startQuestionGeneration() {
+        System.out.println("准备生成 " + currentUserType + " 数学题目，请输入生成题目数量（输入-1将退出当前用户，重新登录）：");
+
+        while (true) {
+            String input = scanner.nextLine().trim();
+
+            if (input.startsWith("切换为")) {
+                handleSwitchCommand(input);
+                continue;
+            }
+
+            if (input.equals("-1")) {
+                questionGenerator = null; // 清理生成器实例
+                return;
+            }
+
+            try {
+                int quantity = Integer.parseInt(input);
+                if (quantity >= 10 && quantity <= 30) {
+                    executeQuestionGeneration(quantity);
+                    break;
+                } else {
+                    System.out.println("错误:题目数量必须在10-30之间,请重新输入:");
+                }
+            } catch (NumberFormatException e) {
+                System.out.println("错误:请输入有效的数字(10-30)或-1返回主菜单");
+            }
+        }
+    }
+
+    private static void handleSwitchCommand(String input) {
+        String target = input.substring(3).trim();
+        if (target.equals("小学") || target.equals("初中") || target.equals("高中")) {
+            currentUserType = target;
+            // 切换类型时重新创建题目生成器实例
+            questionGenerator = createQuestionGenerator(currentUserType);
+            System.out.println("已切换为" + currentUserType + "出题模式");
+            System.out.println("准备生成 " + currentUserType + " 数学题目，请输入生成题目数量");
+        } else {
+            System.out.println("错误:请输入小学,初中和高中三个选项中的一个");
+        }
+    }
+
+    private static void executeQuestionGeneration(int quantity) {
+        File userDir = new File(currentUserName);
+
+        try {
+            // 1. 创建文件夹
+            if (!userDir.exists()) {
+                boolean created = userDir.mkdir();
+                if (!created) {
+                    System.out.println("文件夹创建失败");
+                    return;
+                }
+                System.out.println("创建用户文件夹:" + userDir.getAbsolutePath());
+            }
+
+            // 2. 加载历史题目用于查重
+            Set<String> existingQuestions = loadExistingQuestions(userDir);
+            System.out.println("已加载" + existingQuestions.size() + "道历史题目用于查重");
+
+            // 3. 生成新题目（使用题目生成器实例）
+            List<String> newQuestions = generateQuestions(quantity, existingQuestions);
+
+            // 4. 保存题目
+            saveQuestionsToFile(newQuestions, userDir);
+            System.out.println("成功生成" + newQuestions.size() + "道题目!");
+
+        } catch (Exception e) {
+            System.out.println("生成题目过程中发生错误;" + e.getMessage());
+        }
+    }
+
+    // 修改生成题目的方法，使用题目生成器实例
+    private static List<String> generateQuestions(int quantity, Set<String> existingQuestions) {
+        List<String> newQuestions = new ArrayList<>();
+        Random random = new Random();
+        int attempts = 0;
+        int maxAttempts = quantity * 10;
+
+        while (newQuestions.size() < quantity && attempts < maxAttempts) {
+            attempts++;
+
+            // 使用题目生成器实例生成题目
+            int operandCount = random.nextInt(5) + 1;
+            String question = questionGenerator.generateQuestion(operandCount, random);
+
+            if (!existingQuestions.contains(question) && !newQuestions.contains(question)) {
+                newQuestions.add(question);
+                existingQuestions.add(question);
+
+                if (newQuestions.size() % 5 == 0) {
+                    System.out.println("已生成 " + newQuestions.size() + " 道题目");
+                }
+            }
+        }
+
+        if (attempts >= maxAttempts && newQuestions.size() < quantity) {
+            System.out.println("警告: 由于重复题目较多，只生成了 " + newQuestions.size() + " 道不重复题目");
+        }
+
+        return newQuestions;
+    }
+
+    // 以下文件操作方法保持不变
+    private static Set<String> loadExistingQuestions(File userDir) {
+        Set<String> questions = new HashSet<>();
+
+        if (!userDir.exists() || !userDir.isDirectory()) {
+            return questions;
+        }
+
+        File[] txtFiles = userDir.listFiles(new FilenameFilter() {
+            @Override
+            public boolean accept(File dir, String name) {
+                return name.toLowerCase().endsWith(".txt");
+            }
+        });
+
+        if (txtFiles == null) {
+            return questions;
+        }
+
+        for (File file : txtFiles) {
+            try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
+                String line;
+                while ((line = reader.readLine()) != null) {
+                    if (line.contains(".") && !line.trim().isEmpty()) {
+                        String question = line.substring(line.indexOf(".") + 1).trim();
+                        if (!question.isEmpty()) {
+                            questions.add(question);
+                        }
+                    }
+                }
+            } catch (IOException e) {
+                System.out.println("读取文件失败: " + file.getName());
+            }
+        }
+
+        return questions;
+    }
+
+    private static void saveQuestionsToFile(List<String> questions, File userDir) throws IOException {
+        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
+        String timestamp = dateFormat.format(new Date());
+        String filename = timestamp + ".txt";
+
+        File outputFile = new File(userDir, filename);
+
+        try (PrintWriter writer = new PrintWriter(new FileWriter(outputFile))) {
+            for (int i = 0; i < questions.size(); i++) {
+                writer.print((i + 1) + ". ");
+                writer.println(questions.get(i));
+
+                if (i < questions.size() - 1) {
+                    writer.println();
+                }
+            }
+        }
+
+        System.out.println("题目已保存到: " + outputFile.getAbsolutePath());
+    }
+}