导入学生数据的时候提示重复数据

src/main/java/com/template/controller/WelcomeStudentController.java

@@ -895,12 +895,14 @@ public class WelcomeStudentController implements WelcomeStudentControllerAPI {
             return CommonResult.fail("学生信息数据导入只支持Xls或Xlsx格式文件");
         }
 
+        StringBuilder sb = new StringBuilder();
         List<String> cardIds = result.stream().map(WelcomeStudent::getCardId).collect(Collectors.toList());
         List<WelcomeStudent> existStudents = welcomeStudentService.queryStudentByCardId(cardIds);
         if (existStudents != null && existStudents.size() > 0) {
             for (WelcomeStudent ws : result) {
                 Optional<WelcomeStudent> ows = existStudents.stream().filter(e -> e.getCardId().equals(ws.getCardId())).findFirst();
                 if (ows != null && ows.isPresent()) {
+                    sb.append(ows.get().getName() + ows.get().getCardId()+"数据在数据库中已存在；");
                     ws.setId(ows.get().getId());
                     ws.setAdmissNum(ws.getAdmissNum());//录取号
                     ws.setName(ws.getName());//姓名
@@ -942,7 +944,7 @@ public class WelcomeStudentController implements WelcomeStudentControllerAPI {
         boolean resultBool = welcomeStudentService.saveOrUpdateBatch(result);
 
         System.out.println("导入学生1");
-        return resultBool ? CommonResult.ok("导入成功") : CommonResult.fail("导入失败");
+        return resultBool ? CommonResult.ok("导入成功："+ sb.toString()) : CommonResult.fail("导入失败");
     }
 
     /**