doc/README.md

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+# 中小学数学卷子自动生成器
+
+## 文件结构及类设计
+软件2302_乔毅凡_个人项目  
+|——src  源代码文件夹  
+  |——Base  基本类包   
+    |——Question  题目类  
+    |——User  用户类  
+  |——Deal  操作类包  
+    |——Deal_file  处理文件保存和查重  
+    |——Deal_paper  生成完整试卷  
+    |——Deal_user  处理用户加载  
+  |——Generator  题目生成器包  
+    |——G_ques  题目生成器接口   
+    |——Pri_g_ques  小学题目生成  
+    |——Jun_g_ques  初中题目生成  
+    |——Sen_g_ques  高中题目生成   
+  |——Math_System  出卷系统类   
+  |——Main  main函数  
+|——doc  说明文件目录  
+  |——README.md  说明文件  
+
+## 使用说明  
+1. 进入系统后，输入账号密码登录（空格分割），登录界面输入exit可以退出系统。  
+2. 登陆后，输入数字（10-30）生成试卷，并提示文件的保存地址。  
+3. 登陆后可以通过“切换为/小学/初中/高中”切换出题模式。  
+4. 输入“-1”退出当前登录  
+
+## 题目生成说明
+1. 小学题目2-5个操作数，运算包含+、-、*、\，随机加括号
+2. 初中题目1-5个操作数，运算包含+、-、*、\，随机加平方或开根（至少一个），没有括号
+3. 高中题目1-5个操作数，运算包含+、-、*、\，每一项均为三角函数，随机加平方。
+
+---
+软件2302 202326010228 乔毅凡

src/Base/Question.java

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+package Base;
+
+public class Question {
+    private int number;
+    private String content;
+    private String type;
+
+    public Question(int number, String content, String type) {
+        this.number = number;
+        this.content = content;
+        this.type = type;
+    }
+
+    public int getNumber() { return number; }
+    public String getContent() { return content; }
+    public String getType() { return type; }
+
+    @Override
+    public String toString(){
+        return this.number+". "+this.content+" = ?";
+    }
+}

src/Base/User.java

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+package Base;
+
+public class User {
+    private String id;
+    private String password;
+    private String type;
+
+    public User(String id, String ps, String type) {
+        this.id = id;
+        this.password = ps;
+        this.type = type;
+    }
+
+    public String getUsername() { return id; }
+    public String getPassword() { return password; }
+    public String getUserType() { return type; }
+
+    public void change_type(String new_type){
+        this.type=new_type;
+    }
+}

src/Deal/Deal_file.java

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+package Deal;
+
+import Base.Question;
+
+import java.io.*;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+public class Deal_file {
+    private static final String BASE_DIR="试卷/";
+
+    public Deal_file() {
+        File baseDir = new File(BASE_DIR);
+        if (!baseDir.exists()) {
+            if (!baseDir.mkdirs())
+                System.out.println("目录创建失败！");
+        }
+    }
+
+    public void savePaper(ArrayList<Question> paper, String username) {
+        String userDirPath = BASE_DIR + username + "/";
+        File userDir = new File(userDirPath);
+        if (!userDir.exists()) {
+            if (!userDir.mkdirs()) {
+                System.out.println("目录创建失败！");
+                return;
+            }
+        }
+        String timestamp = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date());
+        String filePath = userDirPath + timestamp + ".txt";
+
+        try (PrintWriter writer = new PrintWriter(new FileWriter(filePath))) {
+            for (int i = 0; i < paper.size(); i++) {
+                writer.println(paper.get(i).toString());
+                if (i < paper.size() - 1) {
+                    writer.println();
+                }
+            }
+            System.out.println("试卷已保存至: " + new File(filePath).getAbsolutePath());
+        } catch (IOException e) {
+            System.out.println("保存文件出错: " + e.getMessage());
+        }
+    }
+
+    public Set<String> Check_Existing(String username) {
+        Set<String> questions = new HashSet<>();
+        String userDirPath = BASE_DIR + username + "/";
+        File userDir = new File(userDirPath);
+
+        if (!userDir.exists() || !userDir.isDirectory()) {
+            return questions;
+        }
+
+        File[] files = userDir.listFiles();
+        if (files == null) {
+            return questions;
+        }
+
+        for (File file : files) {
+            if (file.isFile() && file.getName().endsWith(".txt")) {
+                try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
+                    String line;
+                    while ((line = reader.readLine()) != null) {
+                        if (!line.trim().isEmpty()) {
+                            questions.add(line.trim());
+                        }
+                    }
+                } catch (IOException e) {
+                    return questions;
+                }
+            }
+        }
+        return questions;
+    }
+}

src/Deal/Deal_paper.java

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+package Deal;
+
+import Base.Question;
+import Base.User;
+import Generator.G_ques;
+import Generator.Jun_g_ques;
+import Generator.Pri_g_ques;
+import Generator.Sen_g_ques;
+
+import java.util.ArrayList;
+import java.util.Set;
+
+public class Deal_paper {
+    private G_ques g_ques;
+    private Deal_file write_file;
+    public Deal_paper(User user){
+        write_file=new Deal_file();
+        switch (user.getUserType()){
+            case "小学":{
+                g_ques=new Pri_g_ques();
+                break;
+            }
+            case "初中":{
+                g_ques=new Jun_g_ques();
+                break;
+            }
+            case "高中":{
+                g_ques=new Sen_g_ques();
+                break;
+            }
+            default:{
+                g_ques=new Pri_g_ques();
+            }
+        }
+    }
+
+    public void g_paper(int count,String username){
+        ArrayList<Question> result=new ArrayList<>();
+        Set<String> existing_ques=write_file.Check_Existing(username);
+        for (int i=0;i<count;i++) {
+            String temp;
+            int try_times = 0;
+            do {
+                temp = g_ques.g_question();
+                try_times++;
+            } while (existing_ques.contains(temp) && try_times <= 50);
+            result.add(new Question(i+1, temp, g_ques.g_type()));
+            existing_ques.add(temp);
+        }
+        write_file.savePaper(result,username);
+    }
+
+    public String get_type(){
+        return g_ques.g_type();
+    }
+}

src/Deal/Deal_user.java

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+package Deal;
+
+import Base.User;
+import java.util.HashMap;
+import java.util.Map;
+
+public class Deal_user {
+    private Map<String,User> all_user;
+    public Deal_user(){
+        load_user();
+    }
+
+    public void load_user(){
+        all_user=new HashMap<>();
+
+        all_user.put("张三1", new User("张三1", "123", "小学"));
+        all_user.put("张三2", new User("张三2", "123", "小学"));
+        all_user.put("张三3", new User("张三3", "123", "小学"));
+
+        // 初中老师
+        all_user.put("李四1", new User("李四1", "123", "初中"));
+        all_user.put("李四2", new User("李四2", "123", "初中"));
+        all_user.put("李四3", new User("李四3", "123", "初中"));
+
+        // 高中老师
+        all_user.put("王五1", new User("王五1", "123", "高中"));
+        all_user.put("王五2", new User("王五2", "123", "高中"));
+        all_user.put("王五3", new User("王五3", "123", "高中"));
+    }
+
+    public User login(String id,String psw){
+        User temp=all_user.get(id);
+        return (temp!=null&&temp.getPassword().equals(psw))?temp:null;
+    }
+}

src/Generator/G_ques.java

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+package Generator;
+
+public interface G_ques {
+    String g_question();
+    String g_type();
+    char g_operator();
+}

src/Generator/Jun_g_ques.java

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+package Generator;
+
+import java.util.Random;
+
+public class Jun_g_ques implements G_ques{
+    private Random ra= new Random();
+
+    @Override
+    public String g_question() {
+        int count=ra.nextInt(5)+1;
+        StringBuilder question = new StringBuilder();
+        boolean flag=false;
+        for (int i=0;i<count;i++){
+            if (i>0){
+                question.append(" ").append(g_operator()).append(" ");
+            }
+            if (ra.nextDouble()<0.25) {
+                if (ra.nextBoolean()) {
+                    question.append(ra.nextInt(30) + 1).append("²");
+                }
+                else {
+                    question.append("√").append(ra.nextInt(100) + 1);
+                }
+                flag=true;
+            }
+            else {
+                question.append(ra.nextInt(100) + 1);
+            }
+        }
+        if (!flag){
+            if(count==1){
+                if (ra.nextBoolean()){
+                    question.append("²");
+                }
+                else {
+                    question.insert(0,"√");
+                }
+            }
+            else {
+                String[] parts = question.toString().split(" ");
+                int pos = ra.nextInt(count);
+                if (ra.nextBoolean()) {
+                    parts[pos * 2] = parts[pos * 2] + "²";
+                } else {
+                    parts[pos * 2] = "√" + parts[pos * 2];
+                }
+                question = new StringBuilder(String.join(" ", parts));
+            }
+        }
+        return question.toString();
+    }
+
+    @Override
+    public String g_type(){
+        return "初中";
+    }
+
+    @Override
+    public char g_operator(){
+        char[] op={'+','-','*','/'};
+        return op[ra.nextInt(op.length)];
+    }
+}

src/Generator/Pri_g_ques.java

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+package Generator;
+
+import java.util.Random;
+
+public class Pri_g_ques implements G_ques{
+    private Random ra= new Random();
+
+    @Override
+    public String g_question() {
+        int count=ra.nextInt(4)+2;
+        StringBuilder question = new StringBuilder();
+        int count_bracket=0;
+        for (int i=0;i<count;i++) {
+            if (i > 0) {
+                question.append(" ").append(g_operator()).append(" ");
+            }
+            if (i!=count-1&&ra.nextDouble()<0.4){
+                question.append("(");
+                count_bracket++;
+            }
+            question.append(ra.nextInt(100) + 1);
+        }
+        if (count_bracket!=0){
+            question.append(")".repeat(Math.max(0, count_bracket)));
+        }
+        return question.toString();
+    }
+
+    @Override
+    public String g_type(){
+        return "小学";
+    }
+
+    @Override
+    public char g_operator(){
+        char[] op={'+','-','*','/'};
+        return op[ra.nextInt(op.length)];
+    }
+}

src/Generator/Sen_g_ques.java

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+package Generator;
+
+import java.util.Random;
+
+public class Sen_g_ques implements G_ques{
+    private Random ra= new Random();
+
+    @Override
+    public String g_question() {
+        int count=ra.nextInt(5)+1;
+        StringBuilder question = new StringBuilder();
+        boolean flag=false;
+        for (int i=0;i<count;i++) {
+            if (i > 0) {
+                question.append(" ").append(g_operator()).append(" ");
+            }
+            if (ra.nextDouble()<0.3){
+                question.append(g_trig()).append("²").append("(").append(g_angle()).append("°)");
+            }
+            else {
+                question.append(g_trig()).append("(").append(g_angle()).append("°)");
+            }
+        }
+        return question.toString();
+    }
+
+    @Override
+    public String g_type(){
+        return "高中";
+    }
+
+    @Override
+    public char g_operator(){
+        char[] op={'+','-','*','/'};
+        return op[ra.nextInt(op.length)];
+    }
+
+    public String g_trig(){
+        String[] trig={"sin","cos","tan"};
+        return trig[ra.nextInt(trig.length)];
+    }
+
+    public String g_angle(){
+        String[] angle={"15","22.5","75","105","120","135","150","210","300"};
+        return angle[ra.nextInt(angle.length)];
+    }
+}

src/Main.java

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+public class Main {
+    public static void main(String[] args){
+        Math_System m_system=new Math_System();
+        m_system.main_menu();
+    }
+}

src/Math_System.java

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+import Base.User;
+import Deal.Deal_paper;
+import Deal.Deal_user;
+
+import java.util.Scanner;
+
+public class Math_System {
+    private User now_user;
+    private Deal_paper d_paper;
+    private Deal_user d_user;
+    private Scanner scanner;
+
+    public Math_System(){
+        now_user=null;
+        d_paper=null;
+        d_user=new Deal_user();
+    }
+
+    public void main_menu(){
+        scanner=new Scanner(System.in);
+        while(true){
+            if (now_user==null){
+                login_in();
+            }
+            else {
+                generator();
+            }
+        }
+    }
+
+    public void login_in(){
+        System.out.println("请输入用户名和密码（空格分隔）:");
+        String input = scanner.nextLine().trim();
+
+        if (input.equalsIgnoreCase("exit")) {
+            System.exit(0);
+        }
+
+        String[] parts = input.split("\\s+"); //空格
+
+        if (parts.length != 2){
+            System.out.println("请输入正确的用户名、密码");
+            return;
+        }
+
+        String username=parts[0];
+        String psw=parts[1];
+
+        if (d_user.login(username,psw)==null) {
+            now_user=null;
+            System.out.println("请输入正确的用户名、密码");
+        }
+        else {
+            now_user=d_user.login(username,psw);
+            d_paper=new Deal_paper(now_user);
+            System.out.println("当前选择为 " + now_user.getUserType() + " 出题");
+        }
+    }
+
+    public void generator(){
+        System.out.println("准备生成"+now_user.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 = scanner.nextLine().trim();
+
+        if (input.equals("-1")){
+            now_user=null;
+            d_paper=null;
+            return;
+        }
+        if (input.startsWith("切换为")) {
+            change_mode(input);
+            return;
+        }
+        try {
+            int count = Integer.parseInt(input);
+            if (count<10||count>30){
+                System.out.println("题目数量应在10-30之间。");
+                return;
+            }
+            d_paper.g_paper(count,now_user.getUsername());
+        }catch (NumberFormatException e){
+            System.out.println("请正确输入题目数量。");
+        }
+    }
+
+    public void change_mode(String new_mode){
+        String[] parts=new_mode.split("切换为");
+        String type=parts[1].trim();
+        if ((!type.equals("小学") && !type.equals("初中") && !type.equals("高中")) || parts.length!=2){
+            System.out.println("请输入小学、初中和高中三个选项中的一个");
+        }
+        else{
+            now_user.change_type(type);
+            d_paper=new Deal_paper(now_user);
+            System.out.println("成功切换为"+type);
+        }
+    }
+}