fix:恢复了获取做题记录中的问题

src/main/java/com/nju/edu/eval/service/serviceImpl/RecordServiceImpl.java

@@ -1,6 +1,8 @@
 package com.nju.edu.eval.service.serviceImpl;
 
+import com.nju.edu.eval.data.dao.ExamDao;
 import com.nju.edu.eval.data.dao.RecordDao;
+import com.nju.edu.eval.data.entity.Exam;
 import com.nju.edu.eval.data.entity.QuestionRecord;
 import com.nju.edu.eval.model.vo.record.QuestionRecordVO;
 import com.nju.edu.eval.service.RecordService;
@@ -8,8 +10,10 @@ import com.nju.edu.eval.service.convertor.RecordConvertor;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.util.ArrayList;
 import java.util.List;
-import java.util.stream.Collector;
+import java.util.Map;
+import java.util.Objects;
 import java.util.stream.Collectors;
 
 /**
@@ -18,9 +22,13 @@ import java.util.stream.Collectors;
 @Service
 public class RecordServiceImpl implements RecordService {
     private final RecordDao recordDao;
+
+    private final ExamDao examDao;
+
     @Autowired
-    public RecordServiceImpl(RecordDao recordDao) {
+    public RecordServiceImpl(RecordDao recordDao, ExamDao examDao) {
         this.recordDao = recordDao;
+        this.examDao = examDao;
     }
 
     @Override
@@ -31,8 +39,18 @@ public class RecordServiceImpl implements RecordService {
 
     @Override
     public List<QuestionRecordVO> getQuestionRecordsOfExamByUserId(Integer userId, Integer examId){
-        return recordDao.findAllByUserIdAndExamId(userId, examId)
-                .stream().map(RecordConvertor::convertToVO).collect(Collectors.toList());
+        //获取到对应考试的所有题目信息
+        Map<String, Double> questionAndScore = Objects.requireNonNull(examDao.findById(examId).orElse(null)).getQuestionAndScore();
+        //questionRecords为按时间逆序排列的学生做题记录
+        List<QuestionRecord> questionRecords = recordDao.findAllByUserIdAndExamId(userId, examId);
+        List<QuestionRecord> filterRecords = new ArrayList<>();
+        for(QuestionRecord record:questionRecords){
+            filterRecords.add(record);
+            if(filterRecords.size()>=questionAndScore.size()){
+                break;
+            }
+        }
+        return filterRecords.stream().map(RecordConvertor::convertToVO).collect(Collectors.toList());
     }
 
     @Override