编码规范优化

src/Generator.java

@@ -1,30 +1,30 @@
-import java.io.*;
-import java.nio.file.*;
 import java.util.*;
 import java.util.stream.Collectors;
 
-public class questionGenerator {
+public class Generator {
     private static final Random rand = new Random();
 
     static class QuestionGenerator {
-        private final login.Level level;
+        private final Login.Level level;
         private final Set<String> existing;
 
-        QuestionGenerator(login.Level level, List<String> existingQuestions) {
+        QuestionGenerator(Login.Level level, List<String> existingQuestions) {
             this.level = level;
             this.existing = existingQuestions.stream().map(String::trim).collect(Collectors.toSet());
         }
 
         List<String> generatePaper(int n) {
             Set<String> generated = new LinkedHashSet<>();
-            int attempts = 0;
             // 防止死循环
+            int attempts = 0;
             int maxAttempts = 2000;
+
             while (generated.size() < n && attempts < maxAttempts) {
                 attempts++;
                 String q = generateOneQuestion();
                 // 统一去掉题号与多余空白来比对
                 String key = normalize(q);
+                //与文件内+本次前面生成的查重
                 if (!existing.contains(key) && !generated.contains(key)) {
                     generated.add(q);
                 }
@@ -34,14 +34,14 @@ public class questionGenerator {
             }
             return new ArrayList<>(generated);
         }
-
+        //去空格
         private String normalize(String s) {
             return s.replaceAll("\\s+","").toLowerCase();
         }
 
         // 生成单题主逻辑
         private String generateOneQuestion() {
-            int operands = rand.nextInt(4) + 2; // 保证 2..5 个操作数
+            int operands = rand.nextInt(5) + 1; // 保证 2..5 个操作数
             return switch (level) {
                 case PRIMARY -> genPrimary(operands);
                 case MIDDLE -> genMiddle(operands);
@@ -79,9 +79,8 @@ public class questionGenerator {
         private String genMiddle(int operands) {
             // 基本表达式生成，后插入平方或开根号
             String expr = genPrimary(operands); // 基本算术
-            // decide to apply square or sqrt to random operand or subexpression
+            // 2选1
             if (rand.nextBoolean()) {
-                // apply ^2 somewhere
                 // 找一个数字位置并替换为 (x)^2
                 expr = applySquare(expr);
             } else {
@@ -93,7 +92,7 @@ public class questionGenerator {
         // 生成高中题：至少包含 sin/cos/tan
         private String genHigh(int operands) {
             String expr = genPrimary(operands);
-            expr = applyTrig(expr); // 把某个数或子表达式包成 trig(...)
+            expr = applyTrig(expr);
             return expr;
         }
 
@@ -115,7 +114,6 @@ public class questionGenerator {
         private String applySqrt(String expr) {
             List<int[]> spans = findNumberSpans(expr);
             if (spans.isEmpty()) {
-                // fallback: wrap entire expr
                 return "sqrt(" + expr + ")";
             }
             int[] s = spans.get(rand.nextInt(spans.size()));
@@ -139,7 +137,7 @@ public class questionGenerator {
             return before + func + "(" + num + ")" + after;
         }
 
-        // 找到表达式中纯数字的起止索引
+        // 找出数字位置
         private List<int[]> findNumberSpans(String expr) {
             List<int[]> spans = new ArrayList<>();
             char[] chs = expr.toCharArray();
@@ -156,11 +154,11 @@ public class questionGenerator {
             }
             return spans;
         }
-
+        //a..b随机数
         private int randInt(int a, int b) {
             return rand.nextInt(b - a + 1) + a;
         }
-
+        //抽签功能
         private <T> T randomChoice(List<T> list) {
             return list.get(rand.nextInt(list.size()));
         }

src/Main.java

@@ -1,20 +1,18 @@
 import java.nio.charset.StandardCharsets;
-import java.io.*;
-import java.nio.file.*;
 import java.util.*;
 
-public class mpg_main {
+public class Main {
     private static final Scanner scanner = new Scanner(System.in, StandardCharsets.UTF_8);
     public static void main(String[] args) {
         System.out.println("=== 中小学数学卷子自动生成程序 ===");
         while (true) {
-            login.Account user = login.loginLoop();
+            Login.Account user = Login.LoginLoop();
             if (user == null) continue;
-            login.Level currentLevel = user.level;
-            System.out.println("当前选择为 " + languageSwitch.levelToChinese(currentLevel) + "出题");
+            Login.Level currentLevel = user.level;
+            System.out.println("当前选择为 " + LanguageSwitch.levelToChinese(currentLevel) + "出题");
             boolean loggedIn = true;
             while (loggedIn) {
-                System.out.print("系统提示“准备生成 " + languageSwitch.levelToChinese(currentLevel) + "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）：”\n> ");
+                System.out.print("系统提示“准备生成 " + LanguageSwitch.levelToChinese(currentLevel) + "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）：”\n> ");
                 String line = scanner.nextLine().trim();
                 if (line.equals("-1")) {
                     System.out.println("退出当前用户，返回登录界面。");
@@ -27,12 +25,12 @@ public class mpg_main {
                         System.out.println("请输入小学、初中和高中三个选项中的一个");
                         continue;
                     }
-                    login.Level newLevel = languageSwitch.chineseToLevel(target);
+                    Login.Level newLevel = LanguageSwitch.chineseToLevel(target);
                     if (newLevel == null) {
                         System.out.println("请输入小学、初中和高中三个选项中的一个");
                     } else {
                         currentLevel = newLevel;
-                        System.out.println("切换成功。当前选择为 " + languageSwitch.levelToChinese(currentLevel) + "出题");
+                        System.out.println("切换成功。当前选择为 " + LanguageSwitch.levelToChinese(currentLevel) + "出题");
                     }
                     continue;
                 }
@@ -53,14 +51,14 @@ public class mpg_main {
                     continue;
                 }
                 // 生成题目
-                List<String> existing = loadFile.loadExistingQuestions(user.username);
-                questionGenerator.QuestionGenerator qg = new questionGenerator.QuestionGenerator(currentLevel, existing);
+                List<String> existing = LoadFile.loadExistingQuestions(user.username);
+                Generator.QuestionGenerator qg = new Generator.QuestionGenerator(currentLevel, existing);
                 List<String> paper = qg.generatePaper(n);
                 if (paper.isEmpty()) {
                     System.out.println("未能生成题目（可能因去重约束导致）。");
                 } else {
                     // 保存文件
-                    String savedPath = savepaper.savePaper(user.username, paper);
+                    String savedPath = Save.savePaper(user.username, paper);
                     System.out.println("已生成 " + paper.size() + " 道题，保存为: " + savedPath);
                 }
             }

src/Save.java

@@ -3,7 +3,7 @@ import java.nio.file.*;
 import java.util.*;
 import java.text.SimpleDateFormat;
 import java.nio.charset.StandardCharsets;
-public class savepaper {
+public class Save {
     // 保存试卷，返回保存路径字符串
     public static String savePaper(String username, List<String> paper) {
         Path userDir = Paths.get("data", username);

src/languageSwitch.java

@@ -1,6 +1,6 @@
-public class languageSwitch {
+public class LanguageSwitch {
     //等级转中文输出
-    public static String levelToChinese(login.Level l) {
+    public static String levelToChinese(Login.Level l) {
         return switch (l) {
             case PRIMARY -> "小学";
             case MIDDLE -> "初中";
@@ -9,12 +9,12 @@ public class languageSwitch {
         };
     }
     //等级中文输入转level
-    public static login.Level chineseToLevel(String s) {
+    public static Login.Level chineseToLevel(String s) {
         s = s.trim();//去除前后空格
         return switch (s) {
-            case "小学" -> login.Level.PRIMARY;
-            case "初中" -> login.Level.MIDDLE;
-            case "高中" -> login.Level.HIGH;
+            case "小学" -> Login.Level.PRIMARY;
+            case "初中" -> Login.Level.MIDDLE;
+            case "高中" -> Login.Level.HIGH;
             default -> null;
         };
     }

src/loadFile.java

@@ -3,9 +3,9 @@ import java.io.*;
 import java.nio.file.*;
 import java.util.*;
 import java.util.stream.Collectors;
-public class loadFile {
+public class LoadFile {
     // 读取该用户文件夹下已有题目的所有题目文本
-   public static List<String> loadExistingQuestions(String username) {
+    public static List<String> loadExistingQuestions(String username) {
         List<String> all = new ArrayList<>();
         Path userDir = Paths.get("data", username);
         if (!Files.exists(userDir)) return all;

src/login.java

@@ -3,7 +3,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Scanner;
 
-public class login {
+public class Login {
     public static class Account {
         String username;//用户名
         String password;//密码
@@ -35,7 +35,7 @@ public class login {
         accounts.put("王五2", new Account("王五2","123", Level.HIGH));
         accounts.put("王五3", new Account("王五3","123", Level.HIGH));
     }
-    public static Account loginLoop() {
+    public static Account LoginLoop() {
         while (true) {
             System.out.print("请输入用户名和密码，两者之间用空格隔开：\n> ");
             String line = scanner.nextLine().trim();//行输入；
@@ -49,7 +49,7 @@ public class login {
             Account acc = accounts.get(username);
 
             if (acc != null && acc.password.equals(password)) {
-                System.out.println("登录成功。当前选择为 " + languageSwitch.levelToChinese(acc.level) + "出题");
+                System.out.println("登录成功。当前选择为 " + LanguageSwitch.levelToChinese(acc.level) + "出题");
                 return acc;
             } else {
                 System.out.println("请输入正确的用户名、密码");