diff --git a/exam-module-judgement/exam-module-judgement-biz/src/main/java/pc/exam/pp/module/judgement/service/auto_tools/AutoToolsServiceImpl.java b/exam-module-judgement/exam-module-judgement-biz/src/main/java/pc/exam/pp/module/judgement/service/auto_tools/AutoToolsServiceImpl.java
index df1daa12..1138ad46 100644
--- a/exam-module-judgement/exam-module-judgement-biz/src/main/java/pc/exam/pp/module/judgement/service/auto_tools/AutoToolsServiceImpl.java
+++ b/exam-module-judgement/exam-module-judgement-biz/src/main/java/pc/exam/pp/module/judgement/service/auto_tools/AutoToolsServiceImpl.java
@@ -1,6 +1,7 @@
 package pc.exam.pp.module.judgement.service.auto_tools;
 
 import cn.hutool.core.io.IoUtil;
+import com.alibaba.excel.util.StringUtils;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import jakarta.annotation.Resource;
@@ -193,22 +194,24 @@ public class AutoToolsServiceImpl implements AutoToolsService{
             // 1-1-2、读取内容转换成json
             String select_string = readFileAsString(select_file.getPath());
             Stu stu = stringToJson(select_string);
-            // 1-1-3、进行选择题判分
-            for (String key : stu.getQuestionResultMap().keySet()) {
-                // 查询该题的成绩
-                StuPaperScoreDO stuPaperScoreDO = stuPaperScoreService.getStuScoreByPaperIdAndQuid(stuId, paperId, key);
-                // 判断是否做过该题
-                boolean isNull = false;
-                if (stuPaperScoreDO == null) {
-                    stuPaperScoreDO = new StuPaperScoreDO();
-                    stuPaperScoreDO.setStuId(stuId);
-                    stuPaperScoreDO.setQuId(key);
-                    stuPaperScoreDO.setPaperId(paperId);
-                    isNull = true;
+            if(stu!=null){
+                // 1-1-3、进行选择题判分
+                for (String key : stu.getQuestionResultMap().keySet()) {
+                    // 查询该题的成绩
+                    StuPaperScoreDO stuPaperScoreDO = stuPaperScoreService.getStuScoreByPaperIdAndQuid(stuId, paperId, key);
+                    // 判断是否做过该题
+                    boolean isNull = false;
+                    if (stuPaperScoreDO == null) {
+                        stuPaperScoreDO = new StuPaperScoreDO();
+                        stuPaperScoreDO.setStuId(stuId);
+                        stuPaperScoreDO.setQuId(key);
+                        stuPaperScoreDO.setPaperId(paperId);
+                        isNull = true;
+                    }
+                    String value = stu.getQuestionResultMap().get(key);
+                    double selectScore = judgementChoiceService.programmingChoice(2.0, key, value, stuPaperScoreDO, isNull);
+                    score += selectScore;
                 }
-                String value = stu.getQuestionResultMap().get(key);
-                double selectScore = judgementChoiceService.programmingChoice(2.0, key, value, stuPaperScoreDO, isNull);
-                score += selectScore;
             }
             // 1-1-4、删除文件
             select_file.delete();