.gitignore

@@ -0,0 +1,30 @@
+### IntelliJ IDEA ###
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+.kotlin
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

.idea/.gitignore

@@ -0,0 +1,8 @@
+# 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

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_25" default="true" project-jdk-name="25" 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://$PROJECT_DIR$/develop.iml" filepath="$PROJECT_DIR$/develop.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

README.md

@@ -1,2 +0,0 @@
-# personal
-

develop.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/MathTestGenerator.java

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+import java.io.*;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+class Question {
+    private String content;
+    private String answer;
+
+    public Question(String content, String answer) {
+        this.content = content;
+        this.answer = answer;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public String getAnswer() {
+        return answer;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Question question = (Question) o;
+        return content.equals(question.content);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(content);
+    }
+}
+
+class User {
+    private String username;
+    private String password;
+    private String level; // 小学、初中、高中
+
+    public User(String username, String password, String level) {
+        this.username = username;
+        this.password = password;
+        this.level = level;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public String getLevel() {
+        return level;
+    }
+
+    public void setLevel(String level) {
+        this.level = level;
+    }
+}
+
+public class MathTestGenerator {
+    private static List<User> users = new ArrayList<>();
+    private static User currentUser = null;
+    private static final String BASE_DIR = "math_questions/";
+
+    static {
+        users.add(new User("张三1", "123", "小学"));
+        users.add(new User("张三2", "123", "小学"));
+        users.add(new User("张三3", "123", "小学"));
+
+        users.add(new User("李四1", "123", "初中"));
+        users.add(new User("李四2", "123", "初中"));
+        users.add(new User("李四3", "123", "初中"));
+
+        users.add(new User("王五1", "123", "高中"));
+        users.add(new User("王五2", "123", "高中"));
+        users.add(new User("王五3", "123", "高中"));
+
+        new File(BASE_DIR).mkdirs();
+    }
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        while (true) {
+            if (currentUser == null) {
+                System.out.print("请输入用户名和密码（用空格隔开）：");
+                String input = scanner.nextLine().trim();
+                String[] parts = input.split(" ");
+
+                if (parts.length != 2) {
+                    System.out.println("请输入正确的用户名、密码");
+                    continue;
+                }
+
+                User user = authenticate(parts[0], parts[1]);
+                if (user != null) {
+                    currentUser = user;
+                    System.out.println("当前选择为 " + currentUser.getLevel() + " 出题");
+                } else {
+                    System.out.println("请输入正确的用户名、密码");
+                }
+            } else {
+                System.out.print("准备生成 " + currentUser.getLevel() + " 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();
+
+                if (input.startsWith("切换为")) {
+                    String level = input.substring(3).trim();
+                    if (level.equals("小学") || level.equals("初中") || level.equals("高中")) {
+                        currentUser.setLevel(level);
+                        System.out.println("系统提示：准备生成 " + currentUser.getLevel() + " 数学题目，请输入生成题目数量");
+                    } else {
+                        System.out.println("请输入小学、初中和高中三个选项中的一个");
+                    }
+                    continue;
+                }
+
+                try {
+                    int count = Integer.parseInt(input);
+                    if (count == -1) {
+                        currentUser = null;
+                        System.out.println("已退出当前用户");
+                    } else if (count >= 10 && count <= 30) {
+                        generateQuestions(count);
+                    } else {
+                        System.out.println("题目数量必须在10-30之间，请重新输入");
+                    }
+                } catch (NumberFormatException e) {
+                    System.out.println("请输入有效的数字");
+                }
+            }
+        }
+    }
+
+    private static User authenticate(String username, String password) {
+        for (User user : users) {
+            if (user.getUsername().equals(username) && user.getPassword().equals(password)) {
+                return user;
+            }
+        }
+        return null;
+    }
+
+    private static void generateQuestions(int count) {
+        String level = currentUser.getLevel();
+        Set<Question> allQuestions = new HashSet<>();
+        Set<Question> existingQuestions = loadExistingQuestions();
+
+        while (allQuestions.size() < count) {
+            Question question = generateQuestion(level);
+            if (!existingQuestions.contains(question) && !allQuestions.contains(question)) {
+                allQuestions.add(question);
+            }
+        }
+
+        saveQuestions(allQuestions);
+        System.out.println("已生成" + count + "道" + level + "数学题目，并保存到文件");
+    }
+
+    private static Question generateQuestion(String level) {
+        Random random = new Random();
+        int operandCount = random.nextInt(5) + 1; // 1-5个操作数
+        List<Integer> operands = new ArrayList<>();
+
+        for (int i = 0; i < operandCount; i++) {
+            operands.add(random.nextInt(100) + 1); // 1-100的数字
+        }
+
+        List<Character> operators = new ArrayList<>();
+        if (level.equals("小学")) {
+            char[] ops = {'+', '-', '*', '/'};
+            for (int i = 0; i < operandCount - 1; i++) {
+                operators.add(ops[random.nextInt(4)]);
+            }
+        } else if (level.equals("初中")) {
+            char[] ops = {'+', '-', '*', '/', '^'};
+            for (int i = 0; i < operandCount - 1; i++) {
+                operators.add(ops[random.nextInt(5)]);
+            }
+        } else {
+            char[] ops = {'+', '-', '*', '/', '^', 's', 'c', 'l'}; // s:sin, c:cos, l:log
+            for (int i = 0; i < operandCount - 1; i++) {
+                operators.add(ops[random.nextInt(8)]);
+            }
+        }
+
+        StringBuilder questionStr = new StringBuilder();
+        questionStr.append(operands.get(0));
+
+        for (int i = 0; i < operators.size(); i++) {
+            char op = operators.get(i);
+            switch (op) {
+                case '^':
+                    questionStr.append("^").append(operands.get(i + 1));
+                    break;
+                case 's':
+                    questionStr.append("+sin(").append(operands.get(i + 1)).append(")");
+                    break;
+                case 'c':
+                    questionStr.append("+cos(").append(operands.get(i + 1)).append(")");
+                    break;
+                case 'l':
+                    questionStr.append("+log(").append(operands.get(i + 1)).append(")");
+                    break;
+                default:
+                    questionStr.append(op).append(operands.get(i + 1));
+            }
+        }
+        questionStr.append(" = ?");
+
+        String answer = calculateAnswer(operands, operators, level);
+
+        return new Question(questionStr.toString(), answer);
+    }
+
+    private static String calculateAnswer(List<Integer> operands, List<Character> operators, String level) {
+        return "计算结果";
+    }
+
+    private static Set<Question> loadExistingQuestions() {
+        Set<Question> questions = new HashSet<>();
+        String userDir = BASE_DIR + currentUser.getUsername() + "/";
+        File dir = new File(userDir);
+
+        if (!dir.exists()) {
+            return questions;
+        }
+
+        File[] files = dir.listFiles((d, name) -> name.endsWith(".txt"));
+        if (files == null) {
+            return questions;
+        }
+
+        for (File file : files) {
+            try (BufferedReader br = new BufferedReader(new FileReader(file))) {
+                String line;
+                while ((line = br.readLine()) != null) {
+                    line = line.trim();
+                    if (line.matches("\\d+\\. .+ = \\?")) {
+                        String content = line.substring(line.indexOf(". ") + 2);
+                        questions.add(new Question(content, ""));
+                    }
+                }
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+
+        return questions;
+    }
+
+    private static void saveQuestions(Set<Question> questions) {
+        String userDir = BASE_DIR + currentUser.getUsername() + "/";
+        new File(userDir).mkdirs();
+
+        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
+        String fileName = userDir + sdf.format(new Date()) + ".txt";
+
+        try (BufferedWriter bw = new BufferedWriter(new FileWriter(fileName))) {
+            List<Question> questionList = new ArrayList<>(questions);
+            for (int i = 0; i < questionList.size(); i++) {
+                bw.write((i + 1) + ". " + questionList.get(i).getContent());
+                bw.newLine();
+                if (i != questionList.size() - 1) {
+                    bw.newLine();
+                }
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}