fixed

src/main/java/cn/cslg/pas/service/novelty/NoveltyCompareLiteratureService.java

@@ -48,10 +48,10 @@ public class NoveltyCompareLiteratureService extends ServiceImpl<NoveltyCompareL
 
     public Integer addCompareFile(AddCompareFileDTO vo) {
         Integer compareLitertureId = vo.getCompareLitertureId();
-        List<NoveltyCompareLiterature> list = noveltyCompareLiteratureMapper.selectList(new LambdaQueryWrapper<NoveltyCompareLiterature>()
+        NoveltyCompareLiterature literature = noveltyCompareLiteratureMapper.selectOne(new LambdaQueryWrapper<NoveltyCompareLiterature>()
                 .eq(NoveltyCompareLiterature::getCompareLitertureId, compareLitertureId));
-        NoveltyCompareLiterature literature = new NoveltyCompareLiterature();
-        if (CollectionUtils.isEmpty(list)) {
+        if (ObjectUtils.isEmpty(literature)) {
+            literature = new NoveltyCompareLiterature();
             BeanUtils.copyProperties(vo, literature);
             literature.insert();
         }