初始提交: 添加项目源代码

src/MathExamGenerator.java

@@ -0,0 +1,626 @@
+import java.io.*;
+import java.text.SimpleDateFormat;
+import java.util.*;
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+
+/**
+ * 中小学数学卷子自动生成程序主类
+ */
+public class MathExamGenerator {
+    public static void main(String[] args) {
+        try {
+            ApplicationController controller = new ApplicationController();
+            controller.run();
+        } catch (Exception e) {
+            System.out.println("程序启动失败: " + e.getMessage());
+            e.printStackTrace();
+        }
+    }
+}
+
+/**
+ * 应用程序控制器 - 负责协调各个模块
+ */
+class ApplicationController {
+    private AccountManager accountManager;
+    private String currentUser;
+    private String currentType;
+    private DuplicateChecker duplicateChecker;
+    private FileSaver fileSaver;
+    private Map<String, QuestionGenerator> generatorMap;
+
+    public ApplicationController() {
+        this.accountManager = new AccountManager();
+        this.generatorMap = new HashMap<>();
+        generatorMap.put("小学", new PrimarySchoolGenerator());
+        generatorMap.put("初中", new JuniorHighGenerator());
+        generatorMap.put("高中", new SeniorHighGenerator());
+    }
+
+    public void run() {
+        System.out.println("=== 中小学数学卷子自动生成程序 ===");
+        Scanner scanner = new Scanner(System.in);
+
+        while (true) {
+            // 登录
+            if (!login(scanner)) {
+                break;
+            }
+
+            // 登录后直接进入出题流程
+            boolean stayLoggedIn = true;
+            while (stayLoggedIn) {
+                System.out.print("准备生成" + currentType + "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 = scanner.nextLine().trim();
+
+                // 处理切换类型命令
+                if (input.startsWith("切换为")) {
+                    String newType = input.substring(3).trim();
+                    if (switchType(newType)) {
+                        // 切换成功后继续循环，会显示新的提示
+                        continue;
+                    } else {
+                        // 切换失败，继续当前循环
+                        continue;
+                    }
+                }
+
+                // 处理退出命令
+                if ("-1".equals(input)) {
+                    stayLoggedIn = false;
+                    continue;
+                }
+
+                // 处理题目数量输入
+                try {
+                    int numQuestions = Integer.parseInt(input);
+                    if (numQuestions < 10 || numQuestions > 30) {
+                        System.out.println("题目数量范围应为10-30");
+                        continue;
+                    }
+
+                    // 生成题目
+                    QuestionGenerator generator = generatorMap.get(currentType);
+                    List<String> questions = new ArrayList<>();
+                    int attempts = 0;
+                    int maxAttempts = numQuestions * 10; // 防止无限循环
+
+                    while (questions.size() < numQuestions && attempts < maxAttempts) {
+                        String newQuestion = generator.generateQuestion();
+                        if (!duplicateChecker.isDuplicate(newQuestion)) {
+                            questions.add(newQuestion);
+                            duplicateChecker.addQuestion(newQuestion);
+                        }
+                        attempts++;
+                    }
+
+                    if (questions.size() < numQuestions) {
+                        System.out.println("警告：只生成了" + questions.size() + "道不重复的题目（历史题目过多）");
+                    }
+
+                    // 保存文件
+                    String filename = fileSaver.saveExam(questions, currentType);
+                    System.out.println("试卷已生成并保存为: " + filename);
+                    System.out.println("题目生成完成，可以继续生成新试卷或输入-1退出当前用户");
+
+                } catch (NumberFormatException e) {
+                    System.out.println("请输入有效的数字或'切换为小学/初中/高中'");
+                } catch (Exception e) {
+                    System.out.println("生成题目出错: " + e.getMessage());
+                    e.printStackTrace(); // 添加详细错误信息
+                }
+            }
+
+            // 退出当前用户，准备重新登录
+            logout();
+            System.out.println("已退出当前用户");
+        }
+
+        scanner.close();
+        System.out.println("程序结束");
+    }
+
+    private boolean login(Scanner scanner) {
+        while (true) {
+            System.out.print("请输入用户名和密码（用空格隔开）: ");
+            String input = scanner.nextLine().trim();
+
+            if (input.isEmpty()) {
+                continue;
+            }
+
+            String[] parts = input.split("\\s+");
+            if (parts.length != 2) {
+                System.out.println("请输入正确的用户名、密码格式");
+                continue;
+            }
+
+            String username = parts[0];
+            String password = parts[1];
+
+            LoginResult result = accountManager.validateAccount(username, password);
+            if (result.isSuccess()) {
+                currentUser = username;
+                currentType = result.getUserType();
+                duplicateChecker = new DuplicateChecker(username);
+                fileSaver = new FileSaver(username);
+                System.out.println("当前选择为" + currentType + "出题");
+                return true;
+            } else {
+                System.out.println("请输入正确的用户名、密码");
+            }
+        }
+    }
+
+    private boolean switchType(String newType) {
+        if ("小学".equals(newType) || "初中".equals(newType) || "高中".equals(newType)) {
+            currentType = newType;
+            System.out.println("已切换为" + newType + "出题");
+            return true;
+        } else {
+            System.out.println("请输入小学、初中和高中三个选项中的一个");
+            return false;
+        }
+    }
+
+    private void logout() {
+        currentUser = null;
+        currentType = null;
+        duplicateChecker = null;
+        fileSaver = null;
+    }
+}
+
+/**
+ * 登录结果封装类
+ */
+class LoginResult {
+    private boolean success;
+    private String userType;
+
+    public LoginResult(boolean success, String userType) {
+        this.success = success;
+        this.userType = userType;
+    }
+
+    public boolean isSuccess() {
+        return success;
+    }
+
+    public String getUserType() {
+        return userType;
+    }
+}
+
+/**
+ * 账户管理类
+ */
+class AccountManager {
+    private Map<String, List<Account>> accounts;
+
+    public AccountManager() {
+        accounts = new HashMap<>();
+
+        // 小学账户
+        List<Account> primaryAccounts = Arrays.asList(
+                new Account("张三1", "123"),
+                new Account("张三2", "123"),
+                new Account("张三3", "123")
+        );
+        accounts.put("小学", primaryAccounts);
+
+        // 初中账户
+        List<Account> juniorAccounts = Arrays.asList(
+                new Account("李四1", "123"),
+                new Account("李四2", "123"),
+                new Account("李四3", "123")
+        );
+        accounts.put("初中", juniorAccounts);
+
+        // 高中账户
+        List<Account> seniorAccounts = Arrays.asList(
+                new Account("王五1", "123"),
+                new Account("王五2", "123"),
+                new Account("王五3", "123")
+        );
+        accounts.put("高中", seniorAccounts);
+    }
+
+    public LoginResult validateAccount(String username, String password) {
+        for (Map.Entry<String, List<Account>> entry : accounts.entrySet()) {
+            for (Account account : entry.getValue()) {
+                if (account.getUsername().equals(username) && account.getPassword().equals(password)) {
+                    return new LoginResult(true, entry.getKey());
+                }
+            }
+        }
+        return new LoginResult(false, null);
+    }
+
+    /**
+     * 账户信息封装类
+     */
+    private static class Account {
+        private String username;
+        private String password;
+
+        public Account(String username, String password) {
+            this.username = username;
+            this.password = password;
+        }
+
+        public String getUsername() {
+            return username;
+        }
+
+        public String getPassword() {
+            return password;
+        }
+    }
+}
+
+/**
+ * 题目生成器接口
+ */
+interface QuestionGenerator {
+    String generateQuestion();
+}
+
+/**
+ * 小学题目生成器
+ */
+class PrimarySchoolGenerator implements QuestionGenerator {
+    private Random random = new Random();
+    private List<String> operators = Arrays.asList("+", "-", "*", "/");
+
+    @Override
+    public String generateQuestion() {
+        try {
+            // 确保每道题目最少有两个操作数（2-5个）
+            int numOperands = random.nextInt(4) + 2; // 2-5个操作数
+
+            // 生成操作数
+            int[] operands = new int[numOperands];
+            for (int i = 0; i < numOperands; i++) {
+                operands[i] = random.nextInt(100) + 1; // 1-100
+            }
+
+            // 生成运算符
+            String[] operatorArray = new String[numOperands - 1];
+            for (int i = 0; i < numOperands - 1; i++) {
+                operatorArray[i] = operators.get(random.nextInt(operators.size()));
+            }
+
+            // 构建表达式并确保结果非负
+            String expression;
+            do {
+                // 重新生成操作数和运算符（如果之前的结果为负）
+                for (int i = 0; i < numOperands; i++) {
+                    operands[i] = random.nextInt(100) + 1;
+                }
+                for (int i = 0; i < numOperands - 1; i++) {
+                    operatorArray[i] = operators.get(random.nextInt(operators.size()));
+                }
+
+                // 构建表达式
+                StringBuilder exprBuilder = new StringBuilder();
+                exprBuilder.append(operands[0]);
+
+                for (int i = 1; i < numOperands; i++) {
+                    // 如果是减法，确保不会产生负数
+                    if ("-".equals(operatorArray[i-1])) {
+                        // 计算当前部分表达式的值
+                        int currentValue = calculatePartialExpression(exprBuilder.toString());
+                        if (currentValue < operands[i]) {
+                            // 如果减法会产生负数，改为加法
+                            operatorArray[i-1] = "+";
+                        }
+                    }
+
+                    exprBuilder.append(" ").append(operatorArray[i-1]).append(" ").append(operands[i]);
+                }
+
+                expression = exprBuilder.toString();
+
+                // 计算整个表达式的结果
+                double result = evaluateExpression(expression);
+
+                // 如果结果为负，重新生成
+                if (result < 0) {
+                    continue;
+                }
+
+                // 随机添加括号（只在有3个及以上操作数时）
+                if (numOperands >= 3 && random.nextDouble() < 0.3) {
+                    // 只在表达式开头和结尾添加括号，避免复杂计算
+                    expression = "(" + expression + ")";
+                }
+
+                break;
+            } while (true);
+
+            // 在表达式末尾添加等号
+            return expression + " =";
+        } catch (Exception e) {
+            // 如果生成题目出错，返回一个简单的默认题目
+            return "10 + 20 =";
+        }
+    }
+
+    /**
+     * 计算部分表达式的值（简化版，只处理简单的加减乘除）
+     */
+    private int calculatePartialExpression(String expression) {
+        try {
+            // 简单的表达式计算，只处理没有括号的情况
+            String[] tokens = expression.split(" ");
+            int result = Integer.parseInt(tokens[0]);
+
+            for (int i = 1; i < tokens.length; i += 2) {
+                String operator = tokens[i];
+                int operand = Integer.parseInt(tokens[i+1]);
+
+                switch (operator) {
+                    case "+":
+                        result += operand;
+                        break;
+                    case "-":
+                        result -= operand;
+                        break;
+                    case "*":
+                        result *= operand;
+                        break;
+                    case "/":
+                        if (operand != 0) result /= operand;
+                        break;
+                }
+            }
+
+            return result;
+        } catch (Exception e) {
+            return 0; // 如果计算出错，返回0
+        }
+    }
+
+    /**
+     * 评估表达式的结果（简化版）
+     */
+    private double evaluateExpression(String expression) {
+        try {
+            // 移除括号（简化处理）
+            String cleanExpression = expression.replace("(", "").replace(")", "");
+
+            // 简单的表达式计算
+            String[] tokens = cleanExpression.split(" ");
+            double result = Double.parseDouble(tokens[0]);
+
+            for (int i = 1; i < tokens.length; i += 2) {
+                String operator = tokens[i];
+                double operand = Double.parseDouble(tokens[i+1]);
+
+                switch (operator) {
+                    case "+":
+                        result += operand;
+                        break;
+                    case "-":
+                        result -= operand;
+                        break;
+                    case "*":
+                        result *= operand;
+                        break;
+                    case "/":
+                        if (operand != 0) result /= operand;
+                        break;
+                }
+            }
+
+            return result;
+        } catch (Exception e) {
+            return 0; // 如果计算出错，返回0
+        }
+    }
+}
+
+/**
+ * 初中题目生成器
+ */
+class JuniorHighGenerator implements QuestionGenerator {
+    private Random random = new Random();
+    private List<String> baseOperators = Arrays.asList("+", "-", "*", "/");
+
+    @Override
+    public String generateQuestion() {
+        try {
+            // 确保每道题目最少有两个操作数（2-5个）
+            int numOperands = random.nextInt(4) + 2; // 2-5个操作数
+            StringBuilder expression = new StringBuilder();
+
+            boolean hasSpecialOperator = false;
+
+            for (int i = 0; i < numOperands; i++) {
+                // 确保至少有一个特殊运算符
+                if (!hasSpecialOperator && (i == numOperands - 1 || random.nextDouble() < 0.3)) {
+                    if (random.nextBoolean()) {
+                        // 平方
+                        int num = random.nextInt(10) + 1; // 平方的数不宜太大
+                        expression.append(num).append("²");
+                    } else {
+                        // 开根号
+                        int num = random.nextInt(100) + 1;
+                        expression.append("√").append(num);
+                    }
+                    hasSpecialOperator = true;
+                } else {
+                    expression.append(random.nextInt(100) + 1);
+                }
+
+                if (i < numOperands - 1) {
+                    String operator = baseOperators.get(random.nextInt(baseOperators.size()));
+                    expression.append(" ").append(operator).append(" ");
+                }
+            }
+
+            // 如果还没有特殊运算符，强制添加一个
+            if (!hasSpecialOperator) {
+                if (random.nextBoolean()) {
+                    expression.insert(0, random.nextInt(10) + 1 + "² + ");
+                } else {
+                    expression.insert(0, "√" + (random.nextInt(100) + 1) + " + ");
+                }
+            }
+
+            // 在表达式末尾添加等号
+            return expression.toString() + " =";
+        } catch (Exception e) {
+            // 如果生成题目出错，返回一个简单的默认题目
+            return "√25 + 10 =";
+        }
+    }
+}
+
+/**
+ * 高中题目生成器
+ */
+class SeniorHighGenerator implements QuestionGenerator {
+    private Random random = new Random();
+    private List<String> baseOperators = Arrays.asList("+", "-", "*", "/");
+    private List<String> trigFunctions = Arrays.asList("sin", "cos", "tan");
+
+    @Override
+    public String generateQuestion() {
+        try {
+            // 确保每道题目最少有两个操作数（2-5个）
+            int numOperands = random.nextInt(4) + 2; // 2-5个操作数
+            StringBuilder expression = new StringBuilder();
+
+            boolean hasTrigFunction = false;
+
+            for (int i = 0; i < numOperands; i++) {
+                // 确保至少有一个三角函数
+                if (!hasTrigFunction && (i == numOperands - 1 || random.nextDouble() < 0.3)) {
+                    String trigFunc = trigFunctions.get(random.nextInt(trigFunctions.size()));
+                    int angle = random.nextInt(360); // 角度0-359
+                    expression.append(trigFunc).append("(").append(angle).append("°)");
+                    hasTrigFunction = true;
+                } else {
+                    expression.append(random.nextInt(100) + 1);
+                }
+
+                if (i < numOperands - 1) {
+                    String operator = baseOperators.get(random.nextInt(baseOperators.size()));
+                    expression.append(" ").append(operator).append(" ");
+                }
+            }
+
+            // 如果还没有三角函数，强制添加一个
+            if (!hasTrigFunction) {
+                String trigFunc = trigFunctions.get(random.nextInt(trigFunctions.size()));
+                int angle = random.nextInt(360);
+                expression.insert(0, trigFunc + "(" + angle + "°) + ");
+            }
+
+            // 在表达式末尾添加等号
+            return expression.toString() + " =";
+        } catch (Exception e) {
+            // 如果生成题目出错，返回一个简单的默认题目
+            return "sin(30°) + 10 =";
+        }
+    }
+}
+
+/**
+ * 查重管理器
+ */
+class DuplicateChecker {
+    private String username;
+    private Set<String> historyQuestions;
+
+    public DuplicateChecker(String username) {
+        this.username = username;
+        this.historyQuestions = new HashSet<>();
+        loadHistoryQuestions();
+    }
+
+    private void loadHistoryQuestions() {
+        File userFolder = new File("exams/" + username);
+        if (!userFolder.exists() || !userFolder.isDirectory()) {
+            userFolder.mkdirs();
+            return;
+        }
+
+        File[] files = userFolder.listFiles((dir, name) -> name.endsWith(".txt"));
+        if (files == null) return;
+
+        Pattern questionPattern = Pattern.compile("\\d+\\.\\s*(.+)");
+
+        for (File file : files) {
+            try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
+                String line;
+                while ((line = reader.readLine()) != null) {
+                    Matcher matcher = questionPattern.matcher(line);
+                    if (matcher.find()) {
+                        String question = matcher.group(1).trim();
+                        historyQuestions.add(normalizeQuestion(question));
+                    }
+                }
+            } catch (IOException e) {
+                System.out.println("读取历史文件出错: " + e.getMessage());
+            }
+        }
+    }
+
+    private String normalizeQuestion(String question) {
+        // 移除多余空格和等号
+        return question.replaceAll("\\s+", " ").replace(" =", "").trim();
+    }
+
+    public boolean isDuplicate(String question) {
+        // 移除等号后再进行比较
+        String normalized = normalizeQuestion(question.replace(" =", ""));
+        return historyQuestions.contains(normalized);
+    }
+
+    public void addQuestion(String question) {
+        // 移除等号后再保存
+        String normalized = normalizeQuestion(question.replace(" =", ""));
+        historyQuestions.add(normalized);
+    }
+}
+
+/**
+ * 文件保存器
+ */
+class FileSaver {
+    private String username;
+    private File userFolder;
+
+    public FileSaver(String username) {
+        this.username = username;
+        this.userFolder = new File("exams/" + username);
+        this.userFolder.mkdirs();
+    }
+
+    public String saveExam(List<String> questions, String questionType) {
+        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
+        String timestamp = dateFormat.format(new Date());
+        String filename = timestamp + ".txt";
+        File file = new File(userFolder, filename);
+
+        try (PrintWriter writer = new PrintWriter(new FileWriter(file))) {
+            writer.println(questionType + "数学试卷");
+            writer.println("==============================");
+            writer.println();
+
+            for (int i = 0; i < questions.size(); i++) {
+                writer.println((i + 1) + ". " + questions.get(i));
+                writer.println();
+            }
+
+            return file.getAbsolutePath();
+        } catch (IOException e) {
+            System.out.println("保存文件出错: " + e.getMessage());
+            return null;
+        }
+    }
+}