fix：无序情况下正确答案、作答答案的判断一致问题

examcloud-support/src/main/java/cn/com/qmth/examcloud/commons/helpers/QuestionOptionHelper.java

@@ -61,10 +61,7 @@ public class QuestionOptionHelper {
 
         if (numberStr.startsWith("[") && numberStr.endsWith("]")) {
             // 已经是Json数字数组的新格式数据，直接解析并返回
-            String[] values = numberStr
-                    .replace("[", "")
-                    .replace("]", "")
-                    .split(",");
+            String[] values = numberStr.replace("[", "").replace("]", "").split(",");
 
             for (String x : values) {
                 if (StringUtils.isBlank(x)) {
@@ -87,6 +84,8 @@ public class QuestionOptionHelper {
             if (String.valueOf(c).matches("[0-9]")) {
                 // 只处理0-9之间的数字
                 numbers.add(c - 48);
+            } else {
+                // 忽略其它字符
             }
         }
 
@@ -107,18 +106,35 @@ public class QuestionOptionHelper {
      * 比较正确答案和学生作答答案是否一致（兼容新、旧格式数据）
      */
     public static boolean isEqualAnswer(String correctAnswer, String studentAnswer) {
+        if (StringUtils.isEmpty(correctAnswer) || StringUtils.isEmpty(studentAnswer)) {
+            // 空正确答案 或 空作答答案，则判为“作答不正确”
+            return false;
+        }
+
+        if (studentAnswer.equals(correctAnswer)) {
+            // 作答答案与正确答案完全一致，则直接判为“作答正确”
+            return true;
+        }
+
+        // 兼容判断题情况（true,false）
+        correctAnswer = correctAnswer.replace("true", "1").replace("false", "0");
+        studentAnswer = studentAnswer.replace("true", "1").replace("false", "0");
+
         List<Integer> correctAnswers = parseNumberOptions(correctAnswer);
         List<Integer> studentAnswers = parseNumberOptions(studentAnswer);
         return CollectionUtils.isEqualCollection(correctAnswers, studentAnswers);
     }
 
     /*public static void main(String[] args) {
-        System.out.println(parseNumbers("987654321 "));
-        System.out.println(parseNumbers("[3,22,1 ]"));
+        System.out.println(isEqualAnswer("", ""));//false
+        System.out.println(isEqualAnswer("", "123"));
+        System.out.println(isEqualAnswer("123", ""));
 
         System.out.println(isEqualAnswer("123", "321"));
         System.out.println(isEqualAnswer("123", "[3,2,1]"));
-        System.out.println(isEqualAnswer("123", "[321]"));
+        System.out.println(isEqualAnswer("123", "[321]"));//false
+        System.out.println(isEqualAnswer("true", "true"));
+        System.out.println(isEqualAnswer("true", "false"));
     }*/
 
 }