v1.3 题目生成逻辑实现

src/main/java/com/ybw/mathapp/Main.java

@@ -4,7 +4,6 @@ import com.ybw.mathapp.entity.QuestionWithOptions;
 import com.ybw.mathapp.service.JuniorHighGenerator;
 import com.ybw.mathapp.service.MultipleChoiceGenerator;
 import com.ybw.mathapp.service.PrimarySchoolGenerator;
-import com.ybw.mathapp.service.SeniorHighGenerator;
 import java.util.List;
 
 public class Main {

src/main/java/com/ybw/mathapp/service/JuniorHighGenerator.java

@@ -1,6 +1,6 @@
 package com.ybw.mathapp.service;
 
-import static com.ybw.mathapp.service.PrimarySchoolGenerator.isNumeric;
+import static com.ybw.mathapp.service.AdvancedCaculate.isNumeric;
 
 import java.util.ArrayList;
 import java.util.List;

src/main/java/com/ybw/mathapp/service/MultipleChoiceGenerator.java

@@ -33,7 +33,6 @@ public class MultipleChoiceGenerator {
    * 生成指定数量的选择题，确保题干不重复。
    *
    * @param count      题目数量
-   * @param numOptions 选项数量，默认为4
    * @return 选择题列表 (去重后)
    */
   public List<QuestionWithOptions> generateMultipleChoiceQuestions(int count) {

src/main/java/com/ybw/mathapp/service/PrimarySchoolGenerator.java

@@ -1,5 +1,7 @@
 package com.ybw.mathapp.service;
 
+import static com.ybw.mathapp.service.AdvancedCaculate.isNumeric;
+
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Random;
@@ -78,26 +80,6 @@ public class PrimarySchoolGenerator implements QuestionGenerator {
     }
   }
 
-  /**
-   * 判断给定字符串是否为数字。
-   *
-   * <p>该方法检查字符串是否可以转换为数字格式。
-   *
-   * @param str 待检查的字符串
-   * @return 如果字符串是数字则返回true，否则返回false
-   */
-  public static boolean isNumeric(String str) {
-    if (str == null || str.isEmpty()) {
-      return false;
-    }
-    try {
-      Double.parseDouble(str);
-      return true;
-    } catch (NumberFormatException e) {
-      return false;
-    }
-  }
-
   /**
    * 生成基本的四则运算表达式部分。
    *

src/main/java/com/ybw/mathapp/service/SeniorHighGenerator.java

@@ -1,6 +1,6 @@
 package com.ybw.mathapp.service;
 
-import static com.ybw.mathapp.service.PrimarySchoolGenerator.isNumeric;
+import static com.ybw.mathapp.service.AdvancedCaculate.isNumeric;
 
 import java.util.ArrayList;
 import java.util.List;