first commit

.idea/.gitignore

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+# 默认忽略的文件
+/shelf/
+/workspace.xml
+# 基于编辑器的 HTTP 客户端请求
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="openjdk-24" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/math_exam_generator2.iml" filepath="$PROJECT_DIR$/math_exam_generator2.iml" />
+    </modules>
+  </component>
+</project>

math_exam_generator2.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

src/Info.java

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+public interface Info {
+}

src/JuniorQuestionGenerator.java

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+import java.util.Random;
+
+/**
+ * 初中题目生成器实现
+ * 生成适合初中生的数学题目，包含平方和开根号运算
+ */
+public class JuniorQuestionGenerator implements QuestionGenerator {
+    @Override
+    public String generateQuestion(StringBuilder question, Random random) {
+        // 确保所有初中题目都包含至少一个平方或开根号的运算符
+        int num = random.nextInt(100) + 1;
+        boolean isSquare = random.nextBoolean();
+
+        if (isSquare) {
+            // 生成平方题
+            question.append(num).append("^2");
+        } else {
+            // 生成开根号题，确保是完全平方数
+            int sqrtNum = random.nextInt(10) + 1;
+            num = sqrtNum * sqrtNum;
+            question.append("√").append(num);
+        }
+
+        // 添加一些其他运算符使题目更复杂
+        int complexity = random.nextInt(2) + 1;
+        for (int i = 0; i < complexity; i++) {
+            String[] operators = {"+", "-", "*"};
+            String op = operators[random.nextInt(operators.length)];
+            int addNum = random.nextInt(10) + 1;
+            question.append(" ").append(op).append(" ").append(addNum);
+        }
+
+        question.append(" = ?");
+        return question.toString();
+    }
+}

src/MathExamGenerator.java

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+import java.io.*;
+import java.nio.charset.Charset;
+import java.nio.file.*;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+/**
+ * 中小学数学卷子自动生成程序
+ * 主类，负责用户登录、题目生成和文件操作
+ */
+public class MathExamGenerator {
+    // 预设的用户账号信息
+    private static final Map<String, UserInfo> USER_ACCOUNTS = new HashMap<>();
+
+    // 当前登录用户信息
+    private static UserInfo currentUser = null;
+    // 已生成的题目集，用于检查重复
+    private static final Set<String> generatedQuestions = new HashSet<>();
+
+    private static boolean isRunning = true;
+
+    static {
+        // 初始化小学、初中和高中各三个账号
+        // 小学账户
+        USER_ACCOUNTS.put("张三1", new UserInfo("张三1", "123", "小学"));
+        USER_ACCOUNTS.put("张三2", new UserInfo("张三2", "123", "小学"));
+        USER_ACCOUNTS.put("张三3", new UserInfo("张三3", "123", "小学"));
+
+        // 初中账户
+        USER_ACCOUNTS.put("李四1", new UserInfo("李四1", "123", "初中"));
+        USER_ACCOUNTS.put("李四2", new UserInfo("李四2", "123", "初中"));
+        USER_ACCOUNTS.put("李四3", new UserInfo("李四3", "123", "初中"));
+
+        // 高中账户
+        USER_ACCOUNTS.put("王五1", new UserInfo("王五1", "123", "高中"));
+        USER_ACCOUNTS.put("王五2", new UserInfo("王五2", "123", "高中"));
+        USER_ACCOUNTS.put("王五3", new UserInfo("王五3", "123", "高中"));
+    }
+
+    public static void main(String[] args) {
+        // 使用BufferedReader配合InputStreamReader，明确指定GBK编码
+        try (BufferedReader reader = new BufferedReader(
+                new InputStreamReader(System.in, Charset.forName("GBK")))) {
+
+            System.out.println("欢迎使用中小学数学卷子自动生成程序");
+            System.out.println("请使用您的账号和密码登录（格式：用户名 密码）");
+
+            while (isRunning) {
+                if (currentUser == null) {
+                    handleLogIn(reader);
+                } else {
+                    handleRequirement(reader);
+                }
+            }
+        } catch (IOException e) {
+            System.out.println("输入输出错误：" + e.getMessage());
+        }
+    }
+    public static void handleLogIn(BufferedReader reader) throws IOException {
+        // 用户未登录，显示登录提示
+        System.out.print("请输入用户名和密码（用空格隔开,输入exit退出）：");
+        String input = reader.readLine();
+
+        if (input == null || input.trim().isEmpty()) {
+            return;
+        } else if (input.equals("exit")) {
+            isRunning = false;
+            return;
+        }
+
+        String[] parts = input.split(" ");
+
+        if (parts.length == 2) {
+            String username = parts[0];
+            String password = parts[1];
+            // 验证用户登录
+            boolean loginSuccess = false;
+            for (Map.Entry<String, UserInfo> entry : USER_ACCOUNTS.entrySet()) {
+                if (entry.getValue().getUsername().equals(username) &&
+                        entry.getValue().getPassword().equals(password)) {
+                    currentUser = entry.getValue();
+                    loginSuccess = true;
+                    break;
+                }
+            }
+            if (loginSuccess) {
+                System.out.println("登录成功！当前选择为" + currentUser.getUserType() + "出题");
+                System.out.println("提示：您可以输入'切换为小学'、'切换为初中'或'切换为高中'来切换题目难度");
+                handleUserChoice();
+                loadExistingQuestions();
+            } else {
+                System.out.println("登录失败，请输入正确的用户名和密码");
+            }
+        } else {
+            System.out.println("输入格式错误，请用空格分隔用户名和密码");
+        }
+    }
+    private static void handleRequirement(BufferedReader reader) throws IOException {
+        // 用户已登录，显示题目数量输入提示
+        System.out.print("准备生成" + currentUser.getUserType() +
+                "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）：");
+        String input = reader.readLine();
+        if (input == null || input.trim().isEmpty()) {
+            return;
+        }
+        // 检查是否为切换类型命令
+        if (input.startsWith("切换为")) {
+            String targetType = input.substring(3).trim();
+            if ("小学".equals(targetType) || "初中".equals(targetType) || "高中".equals(targetType)) {
+                currentUser.setUserType(targetType);
+                System.out.println("切换成功！准备生成" + currentUser.getUserType() + "数学题目，请输入生成题目数量");
+            } else {
+                System.out.println("切换类型错误，请输入'切换为小学'、'切换为初中'或'切换为高中'");
+            }
+            return;
+        }
+
+        try {
+            int questionCount = Integer.parseInt(input);
+
+            if (questionCount == -1) {
+                // 退出登录
+                currentUser = null;
+                generatedQuestions.clear();
+                System.out.println("已退出登录");
+            } else if (questionCount >= 10 && questionCount <= 30) {
+                // 生成题目
+                generateExam(questionCount);
+            } else {
+                System.out.println("题目数量必须在10-30之间");
+            }
+        } catch (NumberFormatException e) {
+            System.out.println("请输入有效的数字");
+        }
+    }
+    // 生成试卷
+    private static void generateExam(int questionCount) {
+        List<String> questions = generateUniqueQuestions(questionCount);
+
+        // 保存试卷到文件
+        saveExamToFile(questions);
+
+        System.out.println("已成功生成" + questions.size() + "道" + currentUser.getUserType() + "数学题目");
+        handleUserChoice();
+    }
+
+    // 生成不重复的题目
+    private static List<String> generateUniqueQuestions(int questionCount) {
+        List<String> questions = new ArrayList<>();
+        Random random = new Random();
+        int attempts = 0;
+        int maxAttempts = questionCount * 3; // 最多尝试次数，避免死循环
+
+        while (questions.size() < questionCount && attempts < maxAttempts) {
+            String question = generateQuestion();
+            if (!generatedQuestions.contains(question)) {
+                questions.add(question);
+                generatedQuestions.add(question);
+            }
+            attempts++;
+        }
+
+        return questions;
+    }
+
+    // 处理用户生成试卷后的选择
+    private static void handleUserChoice() {
+        System.out.println("请选择：");
+        System.out.println("1. 生成题目");
+        System.out.println("2. 切换题目难度");
+        System.out.println("3. 退出当前用户");
+        System.out.println("4. 退出程序");
+
+        try {
+            BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(System.in, Charset.forName("GBK")));
+            String choice = reader.readLine();
+
+            switch (choice) {
+                case "2":
+                    handleDifficultySwitch();
+                    break;
+                case "3":
+                    currentUser = null;
+                    generatedQuestions.clear();
+                    System.out.println("已退出登录");
+                    break;
+                case "1":
+                    break;
+                case "4":
+                    isRunning = false;
+                    break;
+                default:
+                    // 继续生成题目，不需要额外操作
+                    break;
+            }
+        } catch (IOException e) {
+            System.out.println("输入错误：" + e.getMessage());
+        }
+    }
+
+    // 处理难度切换
+    private static void handleDifficultySwitch() {
+        try {
+            BufferedReader reader = new BufferedReader(
+                    new InputStreamReader(System.in, Charset.forName("GBK")));
+
+            while (true) {
+                System.out.print("请输入目标难度（小学/初中/高中）：");
+                String targetType = reader.readLine();
+
+                if ("小学".equals(targetType) || "初中".equals(targetType) || "高中".equals(targetType)) {
+                    currentUser.setUserType(targetType);
+                    System.out.println("已切换为" + targetType + "难度");
+                    break;
+                } else {
+                    System.out.println("难度类型错误，请重新输入");
+                }
+            }
+        } catch (IOException e) {
+            System.out.println("输入错误：" + e.getMessage());
+        }
+    }
+
+    // 根据用户类型获取对应的题目生成器
+    private static QuestionGenerator getQuestionGenerator() {
+        if ("小学".equals(currentUser.getUserType())) {
+            return new PrimaryQuestionGenerator();
+        } else if ("初中".equals(currentUser.getUserType())) {
+            return new JuniorQuestionGenerator();
+        } else if ("高中".equals(currentUser.getUserType())) {
+            return new SeniorQuestionGenerator();
+        }
+        return null;
+    }
+
+    // 根据用户类型生成题目
+    private static String generateQuestion() {
+        StringBuilder question = new StringBuilder();
+        Random random = new Random();
+        QuestionGenerator generator = getQuestionGenerator();
+
+        if (generator != null) {
+            return generator.generateQuestion(question, random);
+        }
+
+        return "题目生成错误";
+    }
+
+    // 加载已存在的题目，避免重复
+    private static void loadExistingQuestions() {
+        if (currentUser == null) return;
+        try {
+            String userDir = currentUser.getUsername();
+            File dir = new File(userDir);
+
+            if (dir.exists() && dir.isDirectory()) {
+                File[] files = dir.listFiles();
+                if (files != null) {
+                    for (File file : files) {
+                        if (file.isFile() && file.getName().endsWith(".txt")) {
+                            try (BufferedReader reader = new BufferedReader(
+                                    new InputStreamReader(new FileInputStream(file), Charset.forName("GBK")))) {
+                                String line;
+                                while ((line = reader.readLine()) != null) {
+                                    line = line.trim();
+                                    if (!line.isEmpty() && !line.matches("^\\d+\\.")) {
+                                        generatedQuestions.add(line);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (IOException e) {
+            System.out.println("加载已存在题目时出错：" + e.getMessage());
+        }
+    }
+
+    // 保存试卷到文件
+    private static void saveExamToFile(List<String> questions) {
+        try {
+            // 创建用户目录（相对路径）
+            String userDir = currentUser.getUsername();
+            Files.createDirectories(Paths.get(userDir));
+
+            // 生成文件名：年-月-日-时-分-秒.txt
+            String timestamp = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date());
+            String filePath = userDir + File.separator + timestamp + ".txt";
+
+            try (BufferedWriter writer = new BufferedWriter(
+                    new OutputStreamWriter(new FileOutputStream(filePath), Charset.forName("GBK")))) {
+                for (int i = 0; i < questions.size(); i++) {
+                    writer.write((i + 1) + ". " + questions.get(i));
+                    writer.newLine();
+                    if (i < questions.size() - 1) {
+                        writer.newLine(); // 题目之间空一行
+                    }
+                }
+            }
+        } catch (IOException e) {
+            System.out.println("保存试卷时出错：" + e.getMessage());
+        }
+    }
+}

src/PrimaryQuestionGenerator.java

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+import java.util.Random;
+
+/**
+ * 小学题目生成器实现
+ * 生成适合小学生的数学题目
+ */
+public class PrimaryQuestionGenerator implements QuestionGenerator {
+    @Override
+    public String generateQuestion(StringBuilder question, Random random) {
+        int num1 = random.nextInt(100) + 1; // 1-100的随机数
+        int num2 = random.nextInt(100) + 1;
+        String[] operators = {"+", "-", "*", "/"};
+        String op = operators[random.nextInt(operators.length)];
+
+        // 确保减法和除法结果为正整数
+        if ("-".equals(op) && num1 < num2) {
+            int temp = num1;
+            num1 = num2;
+            num2 = temp;
+        } else if ("/".equals(op)) {
+            // 确保除法结果为整数
+            num1 = num2 * (random.nextInt(10) + 1);
+        }
+
+        // 10%的概率添加括号
+        if (random.nextDouble() < 0.1) {
+            question.append("(");
+            question.append(num1);
+            question.append(" ").append(op).append(" ");
+            question.append(num2);
+            question.append(")");
+        } else {
+            question.append(num1);
+            question.append(" ").append(op).append(" ");
+            question.append(num2);
+        }
+
+        question.append(" = ?");
+        return question.toString();
+    }
+}

src/QuestionGenerator.java

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+import java.util.Random;
+
+/**
+ * 题目生成器接口
+ * 定义生成数学题目的基本方法
+ */
+public interface QuestionGenerator {
+    /**
+     * 生成一道数学题目
+     * @param question 用于构建题目的StringBuilder
+     * @param random 随机数生成器
+     * @return 生成的题目字符串
+     */
+    String generateQuestion(StringBuilder question, Random random);
+}

src/SeniorQuestionGenerator.java

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+import java.util.Random;
+
+/**
+ * 高中题目生成器实现
+ * 生成适合高中生的数学题目，包含三角函数运算
+ */
+public class SeniorQuestionGenerator implements QuestionGenerator {
+    @Override
+    public String generateQuestion(StringBuilder question, Random random) {
+        // 确保所有高中题目都包含至少一个sin、cos或tan的运算符
+        String[] functions = {"sin(", "cos(", "tan("};
+        String func = functions[random.nextInt(functions.length)];
+        int angle = random.nextInt(180);
+
+        question.append(func).append(angle).append(")");
+
+        // 添加一些其他运算符使题目更复杂
+        int complexity = random.nextInt(3);
+        for (int i = 0; i < complexity; i++) {
+            String[] operators = {"+", "-", "*", "/"};
+            String op = operators[random.nextInt(operators.length)];
+            int num = random.nextInt(10) + 1;
+            question.append(" ").append(op).append(" " ).append(num);
+        }
+
+        question.append(" = ?");
+        return question.toString();
+    }
+}

src/UserInfo.java

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+/**
+ * 用户信息类
+ * 存储用户的基本信息，包括用户名、密码和用户类型
+ */
+public class UserInfo implements Info {
+    private String username;
+    private String password;
+    private String userType;
+
+    /**
+     * 构造函数
+     * @param username 用户名
+     * @param password 密码
+     * @param userType 用户类型（小学/初中/高中）
+     */
+    public UserInfo(String username, String password, String userType) {
+        this.username = username;
+        this.password = password;
+        this.userType = userType;
+    }
+
+    /**
+     * 获取用户名
+     * @return 用户名
+     */
+    public String getUsername() {
+        return username;
+    }
+
+    /**
+     * 获取密码
+     * @return 密码
+     */
+    public String getPassword() {
+        return password;
+    }
+
+    /**
+     * 获取用户类型
+     * @return 用户类型
+     */
+    public String getUserType() {
+        return userType;
+    }
+
+    /**
+     * 设置用户类型
+     * @param userType 用户类型
+     */
+    public void setUserType(String userType) {
+        this.userType = userType;
+    }
+}

src/张三2/2025-09-24-12-24-30.txt

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+1. 1 * 34 = ?
+
+2. 30 + 93 = ?
+
+3. 82 * 33 = ?
+
+4. 98 * 97 = ?
+
+5. 58 * 77 = ?
+
+6. 97 - 96 = ?
+
+7. 86 - 27 = ?
+
+8. 73 - 22 = ?
+
+9. 52 + 5 = ?
+
+10. 42 - 6 = ?
+
+11. 72 * 62 = ?
+
+12. 60 - 23 = ?
+
+13. 43 - 37 = ?
+
+14. 198 / 99 = ?
+
+15. 4 / 1 = ?
+
+16. 42 + 57 = ?
+
+17. 356 / 89 = ?
+
+18. 144 / 36 = ?
+
+19. 189 / 21 = ?
+
+20. 74 + 43 = ?