试卷组合策略

src/main/java/com/mathgenerator/Application.java

@@ -2,24 +2,24 @@ package com.mathgenerator;
 
 import com.mathgenerator.auth.Authenticator;
 import com.mathgenerator.service.PaperService;
+import com.mathgenerator.service.strategy.MixedDifficultyStrategy; // 导入具体策略
+import com.mathgenerator.service.strategy.PaperStrategy;       // 导入策略接口
 import com.mathgenerator.storage.FileManager;
-import com.mathgenerator.ui.ConsoleUI; // 导入新的UI类
+import com.mathgenerator.ui.ConsoleUI;
 
-/**
- * 应用程序主入口。
- * 职责：创建并组装所有核心组件，然后启动用户界面。
- */
 public class Application {
     public static void main(String[] args) {
-        // 1. 创建所有核心服务组件
         Authenticator authenticator = new Authenticator();
         FileManager fileManager = new FileManager();
-        PaperService paperService = new PaperService(fileManager);
 
-        // 2. 创建UI组件，并将服务注入其中
+        // 1. 创建一个具体的策略实例
+        PaperStrategy strategy = new MixedDifficultyStrategy();
+
+        // 2. 将策略实例注入到 PaperService 中
+        PaperService paperService = new PaperService(fileManager, strategy);
+
         ConsoleUI consoleUI = new ConsoleUI(authenticator, paperService);
 
-        // 3. 运行UI
         consoleUI.run();
     }
 }

src/main/java/com/mathgenerator/auth/Authenticator.java

@@ -14,7 +14,7 @@ public class Authenticator {
     private static final Map<String, User> USER_DATABASE = initializeUsers();
 
     /**
-     * 初始化预设的用户数据。
+     * 初始化预设的用户数据。这里是暂时定死为这样
      */
     private static Map<String, User> initializeUsers() {
         return Stream.of(

src/main/java/com/mathgenerator/service/PaperService.java

@@ -1,11 +1,8 @@
 package com.mathgenerator.service;
 
-import com.mathgenerator.generator.JuniorHighSchoolGenerator;
-import com.mathgenerator.generator.PrimarySchoolGenerator;
-import com.mathgenerator.generator.QuestionGenerator;
-import com.mathgenerator.generator.SeniorHighSchoolGenerator;
-import com.mathgenerator.model.Level;
 import com.mathgenerator.auth.User;
+import com.mathgenerator.model.Level;
+import com.mathgenerator.service.strategy.PaperStrategy; // 导入策略接口
 import com.mathgenerator.storage.FileManager;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -14,30 +11,28 @@ import java.util.List;
 import java.util.Set;
 
 /**
- * 业务逻辑核心，负责协调生成和存储。
+ * 它现在依赖一个PaperStrategy来决定题目组合方式。
  */
 public class PaperService {
     private final FileManager fileManager;
+    private final PaperStrategy paperStrategy; // 持有策略接口的引用
 
-    public PaperService(FileManager fileManager) {
+    // 通过构造函数注入具体的策略实现
+    public PaperService(FileManager fileManager, PaperStrategy paperStrategy) {
         this.fileManager = fileManager;
+        this.paperStrategy = paperStrategy;
     }
 
-    /**
-     * 创建并保存一份完整的试卷。
-     * @param user 用户对象
-     * @param count 题目数量
-     * @param currentLevel 当前选择的难度等级
-     */
     public void createAndSavePaper(User user, int count, Level currentLevel) {
-        QuestionGenerator generator = createGenerator(currentLevel);
         Set<String> existingQuestions = fileManager.loadExistingQuestions(user.username());
         List<String> newPaper = new ArrayList<>();
         Set<String> generatedInSession = new HashSet<>();
 
-        System.out.println("正在生成题目，请稍候...");
+        System.out.println("正在根据策略生成题目，请稍候...");
         while (newPaper.size() < count) {
-            String question = generator.generateSingleQuestion();
+            // 将选择生成器的逻辑委托给策略对象
+            String question = paperStrategy.selectGenerator(currentLevel).generateSingleQuestion();
+
             if (!existingQuestions.contains(question) && !generatedInSession.contains(question)) {
                 newPaper.add(question);
                 generatedInSession.add(question);
@@ -46,18 +41,10 @@ public class PaperService {
 
         try {
             String filePath = fileManager.savePaper(user.username(), newPaper);
-            System.out.println("成功！" + count + "道" + currentLevel.getChineseName() + "数学题目已生成。");
+            System.out.println("成功！" + count + "道数学题目已生成。");
             System.out.println("文件已保存至: " + filePath);
         } catch (IOException e) {
             System.err.println("错误：保存文件失败 - " + e.getMessage());
         }
     }
-
-    private QuestionGenerator createGenerator(Level level) {
-        return switch (level) {
-            case PRIMARY -> new PrimarySchoolGenerator();
-            case JUNIOR_HIGH -> new JuniorHighSchoolGenerator();
-            case SENIOR_HIGH -> new SeniorHighSchoolGenerator();
-        };
-    }
 }

src/main/java/com/mathgenerator/storage/FileManager.java

@@ -1,7 +1,6 @@
 package com.mathgenerator.storage;
 
 import java.io.IOException;
-//TODO:这里不能导入所有类
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;